Results
2004-23-14: The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 767-200, -300, and -300F series airplanes. This AD requires reworking the surface of the ground stud brackets of the transformer rectifier unit (TRU) and the airplane structure mounting surface, and measuring the resistance from the bracket to the structure and the ground lug to the bracket using a bonding meter. This AD is prompted by a report of loss of all direct current (DC) power generation during a flight, due to inadequate electrical ground path between the ground bracket of the TRU and the structure. We are issuing this AD to prevent depletion of the main battery and consequent loss of all DC power, which could cause the loss of flight critical systems.
2000-03-15: This amendment adopts a new airworthiness directive (AD), applicable to certain McDonnell Douglas Model MD-11 and MD-11F series airplanes, that requires replacement of the existing terminal strips and supports above the main cabin area; and installation of spacers between terminal strips and mounting brackets in the avionics compartment; as applicable. This amendment is prompted by a report indicating that, during flight, an incident of electrical arcing occurred at a terminal strip located overhead in the main cabin. The actions specified by this AD are intended to prevent electrical arcing caused by power feeder cable terminal lugs grounding against terminal strip support brackets, which could result in smoke and fire in the main cabin or avionics compartment.
2023-01-13: The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model DC-9-81 (MD-81), DC-9-82 (MD-82), DC- 9-83 (MD-83), and DC-9-87 (MD-87) airplanes; and Model MD-88 airplanes. This AD was prompted by an evaluation by the design approval holder (DAH) indicating that certain center wing lower stringers are subject to widespread fatigue damage (WFD). WFD analysis found that fatigue cracks could grow to a critical length after the structural modification point (SMP) for these center wing lower stringers. This AD requires replacing certain left and right side center wing lower stringers. The FAA is issuing this AD to address the unsafe condition on these products.
79-03-06: 79-03-06 GULFSTREAM AMERICAN CORPORATION (GAC) (Formerly Grumman American Aviation Corporation): Amendment 39-3408. Applies to GAC Model GA-7 serial numbers GA7-0002 through GA7-0038, GA7-0040, and GA7-0042 through GA7-0087, airplanes certificated in all categories. Compliance is required as indicated, unless already accomplished. To prevent partial loss of rudder control, accomplish the following within 10 hours time in service after the effective date of this AD: 1. Inspect and modify the rudder assembly as appropriate in accordance with GAC Service Bulletin ME-16 dated January 31, 1979, or later revision approved by the Chief, Engineering and Manufacturing Branch, FAA, Southern Region. (a) If freeplay exceeds the maximum allowed in Service Bulletin ME-16 (.040 inches or 1 degree), modify the rudder assembly in accordance with this bulletin before further flight; however, if the freeplay does not exceed .080 inches or 2 degrees, the aircraft may be flown toa base for repairs in accordance with FAR 21.197. (b) If the freeplay is .040 inches (1 degree) or less, modify the rudder system in accordance with Service Bulletin ME-16 within 100 hours time in service after the effective date of this AD. 2. An equivalent method of compliance may be used if approved by the Chief, Engineering and Manufacturing Branch, FAA, Southern Region. This amendment is effective February 15, 1979.
2023-03-01: The FAA is adopting a new airworthiness directive (AD) for Airbus Helicopters Deutschland GmbH (AHD) Model BO-105A, BO-105C, BO- 105S, BO-105LS A-1, BO-105LS A-3, MBB-BK 117 A-1, MBB-BK 117 A-3, MBB- BK 117 A-4, MBB-BK 117 B-1, MBB-BK 117 B-2, MBB-BK 117 C-1, MBB-BK 117 C-2, and MBB-BK 117 D-2 helicopters. This AD was prompted by a report of a missing main rotor swashplate (swashplate) inner ring (inner ring). This AD requires inspecting for the presence of the inner ring and, depending on the results, accomplishing additional actions. This AD also prohibits installing an affected swashplate unless it is determined that the inner ring is installed, as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.
2004-23-13: This amendment adopts a new airworthiness directive (AD); applicable to certain Airbus Model A330, A340-200, and A340-300 series airplanes; that requires inspecting the ram air turbine (RAT) actuator to determine its serial number; and re-identifying the RAT actuator, inspecting the RAT actuator to determine whether the rotary solenoids are in the correct position, and replacing the RAT actuator, as applicable. This action is necessary to prevent failure of the RAT actuator to deploy when necessary during flight, which could result in reduced controllability of the airplane. This action is intended to address the identified unsafe condition.
2014-02-04: We are adopting a new airworthiness directive (AD) for Eurocopter France (Eurocopter) Model EC 155B and EC155B1 helicopters. This AD requires repetitively inspecting the lower and upper front and rear fittings (fittings) that attach the upper fin to the fenestron for a crack and, if there is a crack, removing all four fittings from service. This AD also requires, within a specified time, removing all fittings from service, and the fittings would not be eligible to be installed on any [[Page 5248]] helicopter. This AD was prompted by the loss of an upper fin in flight. The actions of this AD are intended to detect a crack in the fittings to prevent loss of the upper fin and subsequent loss of control of the helicopter.
62-23-04: 62-23-04 GENERAL DYNAMICS/CONVAIR: Amdt. 497 Part 507 Federal Register October 19, 1962. Applies to All Model 30 Aircraft. Compliance required as indicated. As a result of cracking of the main landing gear door upper forward attachment fitting, P/N 30-55153, the following shall be accomplished: (a) Within the next 100 hours' time in service after the effective date of this AD, unless already accomplished within the preceding 250 hours' time in service, and at intervals thereafter not to exceed 350 hours' time in service following that initial inspection, conduct a close visual and dye penetrant inspection of P/N 30-55153 to detect any cracking of the fitting in the vicinity of the attachment of the door actuator. Particular attention shall be given to the radii between the leg and base of these tee-shaped fittings. (b) Any fitting inspected per (a) and found to exhibit a crack not exceeding 4 inches in length shall be replaced with an uncracked part or repaired inaccordance with General Dynamics/Convair Telegraphic Service Instructions dated August 10, 1962, or an equivalent method approved by the Chief, Engineering and Manufacturing Branch, FAA Western Region, prior to further flight. (c) Fittings repaired per (b) shall be reinspected in accordance with the inspection provisions of (a) at intervals not to exceed 100 hours' time in service. (d) Any fitting inspected in accordance with (a) or (c) and found to exhibit a crack greater than 4 inches in length shall be replaced with an uncracked part prior to further flight. (e) When fitting, P/N 30-55153, is reworked in accordance with the provisions of General Dynamics/Convair Service Bulletin No. 32-38, or equivalent rework approved by the Chief, Engineering and Manufacturing Branch, FAA Western Region, the inspections prescribed by (a) or (c) may be discontinued. (f) Upon request of the operator, an FAA maintenance inspector, subject to prior approval of the Chief, Engineering and Manufacturing Branch, FAA Western Region, may adjust the repetitive inspection intervals specified in this AD to permit compliance at an established inspection period of the operator, if the request is substantiated by technical data and/or other facts which justify the acceptability of such increased intervals. (General Dynamics/Convair Alert Service Bulletin No. A32-11, Telegraphic Service Instructions dated August 10, 1962, and Service Bulletin No. 32-38 pertain to this subject.) This directive effective October 19, 1962.
84-01-04: 84-01-04 GARRETT TURBINE ENGINE COMPANY (GTEC, formerly AiResearch Manufacturing Company of Arizona): Amendment 39-4792. Applies to GTEC Engine Models TSE331-3 and TPE331-1, -2, -3, -5, and -6 series engines. Compliance required as indicated, unless already accomplished. To reduce the possibility of rapid destruction of the engine turbine, accomplish the following: (a) Inspect in accordance with the following schedule, P/N 868630-1, -2, -3, -4, and -7 third stage turbine wheels, identified by serial number (S/N) below, in accordance with paragraph 2 of GTEC Service Bulletin (SB) No. TPE/TSE331-72-0351, dated April 14, 1982, or equivalent approved by the Manager, Western Aircraft Certification Field Office. Remove from service, prior to further flight, third stage turbine wheels not meeting the inspection criteria. Third stage turbine wheels meeting the inspection criteria may be continued in service to the life limits of paragraph (d) herein. WHEEL TOTAL CYCLES INSPECT Less than 900 Before accumulation of 1000 cycles. 900 or more, and less than 1000 Within the next 100 cycles. 1000 or more, and less than 1200 Within the next 50 cycles. More than 1200 Within the next 10 cycles. NOTES: For purposes of this AD, a cycle is defined as any operating sequence involving an engine start, aircraft takeoff and landing, followed by engine shutdown, and one cycle shall be counted for each such operational sequence. For purposes of this AD, turbine wheels which comply with paragraph 2 of GTEC SB No. TPE/TSE/331-72-0351 or an equivalent approved by the Manager, Western Aircraft Certification Field Office, must have the SB annotated on the life limited parts log card which is located either with the third stage wheel assembly or with the engine log book. Serial Numbers: 0-01345-419 0-01345-1313 0-01345-2372 9-01345-15426 420 1314 2374 15427 421 1315 2375 15428 422 1316 2376 15429 423 1317 237715432 424 1318 2378 15433 425 1319 2379 18246 426 1320 2380 18247 428 1321 2381 18248 430 1322 2382 18250 431 1323 2383 18251 432 1324 2384 18252 433 1325 2385 18253 435 1326 2386 18256 436 1328 2387 18258 437 1329 2388 18259 438 1330 2529 18260 439 1331 3106 18262 440 1332 3107 18263 441 1335 3109 18264 442 1336 3110 18265 443 1338 3111 18266 444 2336 3112 18286 446 2337 3113 18287 447 2338 3114 18288 448 2339 3118 18289 449 2340 3119 18302 450 2341 3121 18304 451 2342 3122 18305 452 2343 3123 18310 453 2344 3124 18311 454 2345 3125 18316 455 2346 3126 18317 456 2347 3127 18318 458 2348 3128 18320 459 2349 3129 18321 461 2350 3130 18323 463 2351 3131 18324 1296 2352 3121 18325 1298 2353 3133 18326 1299 2354 3124 18328 1301 2355 3135 18329 1302 2356 3136 18330 1304 2357 3140 18414 1305 2358 3141 18415 1306 2359 3145 13072364 3146 1308 2365 3147 1309 2366 3149 1311 2367 3150 1312 2369 3152 2371 3153 3737 (b) Remove from service according to the following schedule, P/N 868630-1, -2, -3, -4, and -7 third stage turbine wheels identified by S/N below: WHEEL TOTAL CYCLES REMOVE* Less than 1300. Before accumulation of 1500 cycles. 1300 or more and less than 2550. Before accumulation of 2600 cycles or within the next 200 cycles whichever occurs first. 2550 or more. Within the next 50 cycles. *No wheel listed below may exceed 1500 total cycles in service after June 1, 1983. Serial Numbers: 0-01345-18350 0-01345-20025 0-01345-21873 18623 20026 21874 18659 20130 21875 18660 20588 21876 18663 20589 21877 18669 20590 21878 18672 20591 21879 18673 20592 21880 18674 20593 21881 18676 20594 21882 18677 20595 21883 18678 20596 21884 19294 20597 21885 19295 20598 21886 19321 20599 21887 19980 20600 2188819983 20601 21889 19984 20602 21890 19985 20603 21891 19986 20604 21892 19987 20605 21893 19988 20606 21894 19989 20607 21895 19990 20608 21896 19991 20609 21897 19992 20611 21898 19993 20612 21899 19994 20613 21900 19995 20614 21903 20615 19996 20616 21904 19997 20617 21905 19998 20618 21906 19999 20619 21907 20000 20620 21908 20001 20621 21909 20002 20622 21910 20003 20623 21911 20004 20624 21914 20008 20625 22332 20009 20626 22333 20010 20627 20011 20628 20012 20629 20013 20630 20014 20631 20015 20632 20016 20633 20017 20634 20018 20635 20019 20637 20020 20779 20021 21869 20022 21870 20023 21871 20024 21872 (c) Inspect, prior to accumulating 2600 total wheel cycles, P/N 868630-1, -2, -3, -4, and -7 third stage turbine wheels introduced into service on or after March 24, 1978, and not listed by S/N in paragraph (a) or (b) herein, in accordancewith paragraph 2 of GTEC SB No. TPE/TSE/331-72-0351, dated April 14, 1982, or equivalent approved by the Manager, Western Aircraft Certification Field Office. Remove from service prior to further flight third stage turbine wheels not meeting the inspection criteria. Third stage turbine wheels meeting the inspection criteria may be continued in service to the life limits of paragraph (d) herein. (d) Remove from service the following turbine wheels within the cyclic life limits specified below: WHEEL STAGE PART NUMBER CYCLE LIFE First 867569-1, -3, -7 5700 cycles Second 868272-1, -2, -3, -4 5400 cycles Third 868630-1, -2, -3, -4, -7 3600 cycles Third 868630-8 4300 cycles Third 895539-1, -2, -3, -4 2000 cycles Turbine wheels listed in this paragraph introduced into service prior to March 24, 1978, were not required to have their cyclic lives recorded. As of the effective date of this AD, lives of these wheels shall be converted to cycles by crediting each hour of operation 9 with 1.5 cycles (i.e.: 3500 hrs x 1.5 = 5250 cycles). Actual cycles, if known, may be used in lieu of this conversion. Thereafter, wheel operating life shall be accrued in cycles. Remove from service in accordance with the following schedule P/N 895539-1, -2, -3, and -4 third stage turbine wheels which exceed the above-listed cyclic limits after converting from hours to cycles: WHEEL TOTAL CYCLES REMOVE 2,000 to 3,750 Within the next 300 cycles. 3,751 to 4,500 Within the next 175 cycles. 4,501 to 5,250 Within the next 75 cycles. Remove from service within the next 300 cycles or 10 months in service, whichever comes first after the effective date of this amendment, P/N 867569-1, -3, -7, P/N 868272-1, -2, -3, -4, and P/N 868630-1, -2, -3, -4, -7 turbine wheels which exceed the above-listed cyclic limits after converting from hours to cycles. (e) Prior to accumulating an additional 2700 cycles after February 11, 1982, onall affected engines containing P/N 868630-1, -2, -3, or -4 or P/N 895539-1, -2, -3, or -4 third stage turbine wheels, or upon next removal of the third stage turbine wheel, after September 9, 1982, whichever occurs earlier, either: (1) Remove curvic coupling gasket, P/N 868892-2, located forward of third stage turbine wheel, and replace it with a serviceable P/N 868892-9 curvic coupling gasket or subsequently approved part number gasket as prescribed in paragraph 2 of GTEC SB No. TPE331-72-0300, dated September 9, 1981, or an equivalent approved by the Manager, Western Aircraft Certification Field Office; or, (2) Replace the third stage turbine wheel with a P/N 868630-7, P/N 868630-8, or an equivalent approved by the Manager, Western Aircraft Certification Field Office. NOTE: The P/N 868630-1, -2, -3, or -4 turbine wheel may be modified to the P/N 868630-7 third stage turbine wheel design by compliance with instructions provided in GTEC SB No. TPE331-72-0327, dated December 14, 1981, or an equivalent approved by the Manager, Western Aircraft Certification Field Office. (f) Remove the third stage turbine seal P/N 868259-1 and replace with a serviceable P/N 868259-2 or subsequently approved part number seal as prescribed in paragraph 2 of GTEC SB No. TPE331-72-0380, dated November 17, 1982, or an equivalent approved by the Manager, Western Aircraft Certification Field Office, upon next removal of the third stage turbine wheel from all affected engines after February 1, 1983. (g) Remove third stage turbine stators P/N 868379-1 from all affected engines and replace with a serviceable P/N 868379-3 or subsequently approved part number stator, as prescribed in paragraph 2 of GTEC SB No. TPE331-72-0384, dated November 17, 1982, or an equivalent approved by the Manager, Western Aircraft Certification Field Office, no later than next removal of the third stage turbine wheel after 2000 hours stator third stage total time, or time since new, or timesince overhaul. NOTE: Operating time and cycles are to be recorded in the Engine Log Book for P/N 868379-3 and subsequent P/N turbine stators. (h) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate aircraft to a base for the accomplishment of inspections or modifications required by this AD. (i) Alternative inspections, modifications, or other actions which provide an equivalent level of safety may be used when approved by the Manager, Western Aircraft Certification Field Office, FAA Northwest Mountain Region. The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to Garrett Turbine Engine Company, Attn: Customer Service Engineering, Department 77-4, P.O. Box 5217, Phoenix,Arizona 85010. These documents also may be examined at FAA Rules Docket, Federal Aviation Administration, New England Region, Office of the Regional Counsel, Burlington, Massachusetts 01803. This AD supersedes AD 82-27-07, Amendment 39-4528, which became effective January 7, 1983. This amendment becomes effective January 25, 1984.
2023-01-05: The FAA is adopting a new airworthiness directive (AD) for certain Learjet, Inc., Model 45 airplanes. This AD was prompted by a determination that new or more restrictive airworthiness limitations are necessary. This AD requires revising the existing inspection program to incorporate reduced inspection intervals for the anti-ice manifold assembly. The FAA is issuing this AD to address the unsafe condition on these products.
2004-23-12: This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 757-200 and -300 series airplanes. This AD requires inspection of the guide arm assembly on passenger door number 1 left for a part mark to determine whether the guide arm assembly contains an adjuster rod, which was incorrectly manufactured, and replacement of any such adjuster rod. This action is necessary to prevent failure of the adjuster rod in the passenger door guide arm assembly, which could prevent the door from opening or closing during normal or emergency operations, resulting in the inability to evacuate the crew and passengers in an emergency. This action is intended to address the identified unsafe condition.
2023-01-03: The FAA is adopting a new airworthiness directive (AD) for all Airbus SAS Model A330-200, A330-200 Freighter, A330-300, A330-800, A330-900, A340-200, and A340-300 series airplanes. This AD was prompted by a determination that certain landing gear parts have been manufactured with improper material or using a deviating manufacturing process. This AD requires replacing each affected part with a serviceable part, and for certain airplanes, re-assessing any previously repaired main landing gear (MLG) sliding piston, as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. This AD also limits the installation of affected parts under certain conditions. The FAA is issuing this AD to address the unsafe condition on these products.
2000-02-33: This amendment adopts a new airworthiness directive (AD) applicable to certain Boeing Model 747-400 series airplanes that requires various inspections and functional tests to detect discrepancies of the thrust reverser control and indication system, and correction of any discrepancy found. This amendment is prompted by reports indicating that several center drive units (CDU) were returned to the manufacturer of the CDU's because of low holding torque of the CDU cone brake. The actions specified by this AD are intended to ensure the integrity of the fail safe features of the thrust reverser system by preventing possible failure modes in the thrust reverser control system that can result in inadvertent deployment of a thrust reverser during flight.
2004-23-08: This amendment supersedes an existing airworthiness directive (AD), applicable to Airbus Model A300 B4-600R and A300 F4-600R series airplanes, that currently requires a one-time detailed inspection for damage of the center tank fuel pumps and fuel pump canisters, and replacement of damaged fuel pumps and fuel pump canisters with new or serviceable parts. That AD also requires repetitive detailed inspections of the fuel pumps and repetitive eddy current inspections of the fuel pump canisters, and replacement of damaged fuel pumps and fuel pump canisters with new or serviceable parts. This amendment mandates modification of the canisters of the center tank fuel pumps, which would terminate the repetitive inspections required by the existing AD. The actions specified by this AD are intended to prevent damage to the fuel pump and fuel pump canister, which could result in loss of flame trap capability and could provide a fuel ignition source in the center fuel tank. This action isintended to address the identified unsafe condition.
2000-02-32: This amendment supersedes an existing airworthiness directive (AD), applicable to Eurocopter France Model SA. 315B helicopters, that currently requires initial and repetitive visual inspections and modification, if necessary, of the horizontal stabilizer spar tube (spar tube). This amendment requires the same corrective actions as the existing AD and would require an additional dye-penetrant inspection of the half-shell attachment clamps (clamps). This amendment is prompted by an in-service report of fatigue cracks that initiated from corrosion pits. The actions specified by this AD are intended to prevent fatigue failure of the spar tube, separation of the horizontal stabilizer and impact with the main or tail rotor, and subsequent loss of control of the helicopter.
2023-02-02: The FAA is adopting a new airworthiness directive (AD) for all Gulfstream Aerospace Corporation (Gulfstream) Model GV and GV-SP airplanes. This AD was prompted by the omission of a life limit in the airworthiness limitations section (ALS) of the maintenance manual for a certain main landing gear (MLG) trunnion pin. This AD requires revising the ALS of the existing instructions for continued airworthiness (ICA) or inspection program for the airplane to establish a life limit for the affected MLG trunnion pin. The FAA is issuing this AD to address the unsafe condition on these products.
2000-02-30: This document adopts a new airworthiness directive (AD) that applies to all Twin Commander Aircraft Corporation (Twin Commander) 600 series airplanes. This AD requires you to revise the Airplane Flight Manual (AFM) to include requirements for activating the airframe pneumatic deicing boots. This AD is the result of reports of in-flight incidents and an accident that occurred in icing conditions where the airframe pneumatic deicing boots were not activated. The actions specified by this AD are intended to assure that flightcrews have the information necessary to activate the pneumatic wing and tail deicing boots at the first signs of ice accumulation. Without this information, flightcrews could experience reduced controllability of the aircraft due to adverse aerodynamic effects of ice adhering to the airplane prior to the first deicing cycle.
2004-23-04: This amendment adopts a new airworthiness directive (AD), applicable to certain Airbus Model A319 and A320 series airplanes, that requires a modification and replacement affecting all fuel tanks. All affected airplanes require the installation of fuses in the wiring of the fuel quantity indicating probes of all fuel tanks. Some affected airplanes also require replacement of the high-level sensors of the additional center tanks (ACTs) with new sensors. For all affected airplanes, these actions are necessary to prevent overheating of the fuel probes due to a short circuit. For some affected airplanes, these actions are necessary to prevent fuel leakage due to inadequate space for thermal expansion within the ACTs. Such conditions could result in fuel vapors or fuel contacting an ignition source and/or consequent fire/explosion in the center fuel tanks. These actions are intended to address the identified unsafe condition.
2004-23-10: The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 737-700 and -800 series airplanes. This AD requires doing an initial inspection for pitting and cracks of the lower skin panel at the lap joint; trimming the inner skin; installing exterior doublers; replacing the fuselage skin assembly; doing repetitive supplemental inspections; and repairing if necessary; as applicable. This AD is prompted by a report indicating that localized pitting in the lower skin panels was found during production on a limited number of airplanes. We are issuing this AD to detect and correct premature fatigue cracking at certain lap splice locations and consequent rapid decompression of the airplane.
2023-01-11: The FAA is adopting a new airworthiness directive (AD) for all Safran Helicopter Engines, S.A. (Safran) Makila 1A and Makila 1A1 model turboshaft engines. This AD was prompted by reports of false engine fire warnings. This AD requires replacing the affected fire detectors, as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. This AD also prohibits the installation of affected fire detectors. The FAA is issuing this AD to address the unsafe condition on these products.
64-05-03: 64-05-03 GENERAL DYNAMICS: Amdt. 688 Part 507 Federal Register February 21, 1964. Applies to All Models 22, 22M, 30 and 30A Aircraft. Compliance required as indicated. To prevent slipping of the aileron trim tab dial assembly in relation to the cable drum within the aileron and rudder trim gearbox assembly; to insure that the gear teeth on the aileron trim tab dial gear are not damaged; and to ascertain that the inside rim of the aileron trim tab dial gear is not rubbing against the sides of the hub of the aileron and rudder trim gear box, accomplish the following: (a) Within 500 hours' time in service after the effective date of this AD, and thereafter at intervals not to exceed 500 hours' time in service from the last check, perform an operational check (see Maintenance Manual) to determine that the aileron trim tab dial indicator and the aileron trim tab deflections correspond throughout the operational range and that the aileron trim tab control knob and dial workproperly without evidence of binding or slippage. If there is any evidence that the aileron trim tab dial indicator and the aileron trim tab deflections do not correspond throughout the operational range or if there is any evidence of binding or slippage in the operation of the aileron trim tab control knob and dial, rework the aircraft per (b)(1) and (b)(2) before further flight. After compliance with paragraph (b) the checks required by this paragraph may be discontinued. (b) Within 1,500 hours' time in service after the effective date of this AD unless the modification has already been accomplished: (1) Pin the aileron trim drum shaft to the shaft gear and the aileron trim tab dial to the aileron trim tab gear per General Dynamics/Convair 880 Service Bulletin No. 27-27, 880M Service Bulletin No. 27-34, or 990 Service Bulletin No. 27-52, as applicable, or an FAA Western Region Engineering and Manufacturing Branch approved equivalent. (2) Conduct a visual inspection of the aileron trim tab dial gear and hub of the support within the aileron and rudder trim gearbox assembly and if there is any evidence that the gear teeth on the aileron trim tab dial gear are damaged or there is any evidence that the inside of the rim of the aileron trim tab dial gear is rubbing the hub of the support, rework the hub of the support and replace any damaged aileron trim tab dial gear with a new gear in accordance with General Dynamics/Convair 880 Service Bulletin No. 27-70, 880M Service Bulletin No. 27-37 or 990 Service Bulletin No. 27-62, as applicable, or an FAA Western Region Engineering and Manufacturing Branch approved equivalent. (General Dynamics/Convair 880 Service Bulletin Nos. 27-27 and 27-70, 880M Service Bulletins Nos. 27-34 and 27-37 and 990 Service Bulletins Nos. 27-52 and 27-62 cover this same subject.) This directive effective March 23, 1964.
2000-02-34: This amendment adopts a new airworthiness directive (AD), applicable to all Bombardier Model CL-600-2B19 (Regional Jet Series 100) series airplanes, that requires revising the Airplane Flight Manual to provide the flightcrew with modified procedures and limitations for operating in icing conditions. This amendment is prompted by an accident report indicating that possible accretion of ice on the wings of the airplane, due to the wing anti- ice system not being activated by the flightcrew, could have contributed to the source of the accident. The actions specified by this AD are intended to prevent undetected accretion of ice on the wings, which could result in reduced controllability of the airplane during normal icing conditions.
2004-23-07: This amendment supersedes an existing airworthiness directive (AD), applicable to certain Boeing Model 737 series airplanes, that currently requires modification of certain fuselage support structure for the number 2 galley. This amendment requires modification of the same support structure using new methods based on new calculations. This amendment also expands the applicability of the existing AD to include additional airplanes. The actions specified by this AD are intended to prevent the galley from shifting, which could limit access to the galley door during emergencies, and result in injury to passengers and flightcrew. This action is intended to address the identified unsafe condition.
2023-01-07: The FAA is adopting a new airworthiness directive (AD) for all GE Aviation Czech s.r.o. (GEAC) H75-100, H75-200, H80, H80-100, H80- 200, H85-100, and H85-200 model turboprop engines. This AD is prompted by the manufacturer revising the airworthiness limitations section (ALS) of the existing engine maintenance manual (EMM) to introduce updated coefficients for the calculation of the cyclic life and safe life for the main shaft. This AD requires revising the ALS of the existing EMM and the operator's existing approved maintenance or inspection program, as applicable, to incorporate the updated coefficients and recalculate the cycles accumulated on critical parts. The FAA is issuing this AD to address the unsafe condition on these products.
2004-23-05: This amendment adopts a new airworthiness directive (AD), applicable to certain McDonnell Douglas airplanes, that requires reversing the ground stud installation of the main battery, and installing a new nameplate on the cover of the battery. This action is necessary to prevent damage to equipment or possible fire in the electrical/electronics equipment compartment due to electrical arcing between the ground stud of the main battery and adjacent structure. This action is intended to address the identified unsafe condition.