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89-07-05: 89-07-05 BOEING: Amendment 39-6163.\n\tApplicability: All Model 727 series airplanes, certificated in any category. \n\n\tCompliance: Required as indicated, unless previously accomplished. \n\tTo prevent binding of the aileron control wheel caused by internal damage in the aileron power control unit (PCU), accomplish the following: \n\n\tA.\tPrior to the accumulation of 18,000 hours time in service on the PCU since new or overhauled with new seals, or within the next 3,000 hours time in service on the PCU after the effective date of this AD, whichever occurs later, accomplish either of the following, in accordance with Boeing Alert Service Bulletin 727-27A0220, Revision 1, dated July 28, 1988: \n\n\t\t1.\tReplace any aileron power control unit with a PCU which has been overhauled including new piston seals or one which has accumulated less than 18,000 hours time in service. Continue to replace any PCU prior to the accumulation of 18,000 hours time in service on the PCU. \n\n\t\t2.\tPerforma hydraulic bench internal leakage test on the aileron power control unit. Before further flight, replace any PCU which fails the test. Repeat the hydraulic bench internal leakage test at intervals not to exceed 2,500 flight cycles. \n\n\tB.\tInspection of the aileron power control unit, and modification of the aileron power control unit including replacement of piston seals, in accordance with National Waterlift Service Bulletin 27-21-1/200, dated April 8, 1988, or National Waterlift Service Bulletin 27-10- 1/200, Revision 1, dated November 4, 1988, constitutes terminating action for the repetitive replacement or internal leakage test required by paragraph A., above. \n\n\tC.\tAn alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region. \n\n\tNOTE: The request should be forwarded through an FAA Principal Maintenance Inspector (PMI), who may add any comments and then send it to the Manager, Seattle Aircraft Certification Office. \n\n\tD.\tSpecial flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base for accomplishment of the rework required by this AD. \n\n\tAll persons affected by this directive who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124-2207. These documents may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or the Seattle Aircraft Certification Office, 9010 East Marginal Way South, Seattle, Washington. \n\n\tThis amendment (39-6163, AD 89-07-05) becomes effective April 26, 1989.
48-28-02: 48-28-02 DOUGLAS: Applies to C-54 and DC-4 Aircraft. \n\n\tTo be accomplished not later than April 1, 1949. \n\n\tAs a fire protection measure in order to prevent burn through, replace the present cabin heater combustion ducts with corrosion resistant steel ducts. \n\n\t(Douglas Service Bulletin DC-4 No. 89 covers this same subject.)
48-10-01: 48-10-01 DOUGLAS: Applies to DC-6 Aircraft. \n\n\tTo be accomplished prior to return to service in class A operation-with cabin supercharging and thermal deicing operative (with the exception of heat windshield deicing) and with cabin heaters inoperative. \n\n\tRework must be accomplished in accordance with the following Douglas Co. data: \n\n\tService Bulletin DC-6 No. 204A. Procedure for Disconnecting No. 2 and No. 3 Alternate Fuel Cells, dated December 18, 1947, or Service Bulletin DC-6 No. 204B, Fuel Tank Vent System Revision, as revised February 19, 1948. \n\n\tService Bulletin DC-6 No. 200, Revised Heater Fuel Pressure Regulator Diaphragms, as revised February 26, 1948. \n\n\tService Bulletin DC-6 No. 201, Removal-Heater Fuel Pressure Regulator Static Balance Lines, dated December 6, 1947. \n\n\tService Bulletin DC-6 No. 202, Heater Fuel Pump Check Valve-Rework, dated December 9, 1947. \n\n\tService Bulletin DC-6 No. 208, Cabin Heater and De-icer Fuel System Revision, as revised February 20, 1948. \n\n\tService Bulletin DC-6 No. 226, section I of V, Fire Extinguisher System for Boiler Room, as revised February 19, 1948. \n\n\tService Bulletin DC-6 No. 226, section II of V, CO2 Piping, as revised February 21, 1948. \n\n\tService Bulletin DC-6 No. 226, section III of V, Installation Fire Detector Boxes and Conduit, dated February 12, 1948. Except that fire detectors in the under floor cargo compartments are not required since these compartments have been determined to comply with CAR 4b.383(d) requirements for Class "D" compartments when they otherwise comply with this Airworthiness Directive. \n\n\tService Bulletin DC-6 No. 226, section IV of V, Electrical Rework, as revised Feb. 26, 1948. \n\n\tService Bulletin DC-6 No. 226, section V of V, Sealing of Forward and Aft Baggage Compartment and Invertor Compartment Blower Duct, as revised February 24, 1948. \n\n\tService Bulletin DC-6 No. 233, Fuel Overboard Drains for Wing Nose Area, dated January 14, 1948. \n\n\tServiceBulletin DC-6 No. 247, Drainage Holes and Dams for Fuselage and Wings, as revised February 18, 1948. \n\n\tService Bulletin DC-6 No. 252, Heater Exhaust Louver Removal, as revised February 17, 1948. \n\n\tService Bulletin DC-6 No. 262, Installation of Combustion Heater Backfire Switches dated February 24, 1948. \n\n\tSuperchargers with No. 7357594 stamped on gearbox housing and 5357091 stamped on the impeller housing (scroll) are satisfactory for A operation. These superchargers will be eligible for either A or C operation when reworked and identified as shown in Douglas Service Bulletin DC-6 No. 258. \n\n\tService Bulletin DC-6 No. 225, Alcohol Windshield De-icing System, as revised February 24, 1948. \n\n\tService Bulletin DC-6 No. 246, Relocation of Manual and Automatic Pressure Relief Valve, as revised February 17, 1948. \n\n\tService Bulletin No. 224 canceled October 4, 1961. \n\n\tService Bulletin DC-6 No. 217, Installation of Fire Axe, as revised Dec. 23, 1947. \n\n\tService BulletinDC-6 No. 214, Modification of Main Junction Box and Annex, as revised February 16, 1948. \n\n\tService Bulletin DC-6 No. 230, Rerouting of Heater Accessory Compartment Power Cables, as revised February 16, 1948. \n\n\tService Bulletin DC-6 No. 149, Fuse Protection for Flight Instrument Transformers, dated December 5, 1947. \n\n\tService Bulletin DC-6 No. 237, Addition of Fuse on Master Switch for Buffet, as revised February 21, 1948. \n\n\tService Bulletin DC-6 No. 248, Conduit Clipping to Combustible Fluid Lines, as revised February 13, 1948, and Addendum dated February 13, 1948. \n\n\tService Bulletin DC-6 No. 212, protective Shield at Forward and AFT Cargo Compartment Lights, as revised January 7, 1948. \n\n\tService Bulletin DC-6 No. 206, Rework of Battery Leads to Prevent Shorting, dated December 9, 1947. \n\n\tService Bulletin DC-6 No. 218, Addition of Phenolic Sheet Insulation to AC Circuit Breaker Guard Assembly, dated December 17, 1947. \n\n\tService Bulletin DC-6 No. 221, Revision ofHeater Fire Extinguisher Buttons, dated December 20, 1947. \n\n\tService Bulletin DC-6 No. 210, Protection for Outer Wing Booster Pump Lead-In, as revised December 22, 1947. \n\n\tService Bulletin DC-6 No. 213, Starter and Generator Power Cable in Wing, as revised December 19, 1947. \n\n\tService Bulletin DC-6 No. 242, Relocation of Tail Heater Control Can, as revised February 17, 1948. \n\n\tService Bulletin DC-6 No. 203, Hand Fire Extinguisher Support Bracket Revision, as revised February 17, 1948. \n\n\tService Bulletin DC-6 No. 260, Installation of AAL Type Master Switch Arrangement and Emergency Inverter, as revised February 24, 1948. (This installation not required on aircraft incorporating one set of vacuum operated flight instruments.) \n\n\tService Bulletin DC-6 No. 267, Installation Heater Safety Relays, dated February 27, 1948. \n\n\tService Bulletin DC-6 No. 205, Rework of DC-6 Fuel Tank and Cell Vent Chambers, as revised February 23, 1948. \n\n\tService Bulletin DC-6 No. 207, Guard for Fuel Booster Pump Switches, as revised December 19, 1947. \n\n\tService Bulletin DC-6 No. 253, Fireproofing of Wing De-icer Ducts in Nacelles, as revised February 24, 1948. \n\n\tService Bulletin DC-6 No. 219, Rework of Whittaker Firewall Shut-Off Valves, dated December 19, 1947. \n\n\tService Bulletin DC-6 No. 114, Fuel Flow Transmitter Line Replacement, dated October 29, 1947. \n\n\tService Bulletin DC-6 No. 261, Installation of Oil Separator for Vacuum Pump Drain Lines, dated February 25, 1948. \n\n\tService Bulletin DC-6 No. 249, Boiler Room Duct Revision, dated February 24, 1948. \n\n\tService Bulletin DC-6 No. 232, Wing Heater Exhaust Insulation Cover, as revised February 16, 1948. \n\n\tService Bulletin DC-6 No. 234, Tail Heater Ground Blower Check Valve Revision, as revised January 23, 1948. \n\n\tThe rework outlined in the data listed above is based upon an airplane which incorporates certain production changes. Therefore, in order to satisfactorily complete the required rework, some aircraft* must also be revised in accordance with the following: \n\n\tService Bulletin DC-6 No. 62, Rework-Cabin Pressure Control Valve Linkage, dated September 2, 1947. \n\n\tService Bulletin DC-6 No. 111, Cabin Heater Fire Extinguisher Bottle, dated October 22, 1947. (Partial accomplishment only is required, which is to include: Support No. 5333704-10, Pipe No. 5332568-518 and attaching parts.) \n\n\tService Bulletin DC-6 No. 119, Aft Baggage Compartment Smoke Detector Pick-up Pipe Revision, dated December 6, 1947. (To be accomplished only if Modification Item 59 has not been accomplished.) \n\n\tService Bulletin DC-6 No. 16, installation of Additional Dams and Drain Plug in Fuselage Bottom, dated June 26, 1947. \n\n\tService Bulletin DC-6 No. 161, Rear Lounge Hot Air Supply Duct Sound Trap Installation, dated January 30, 1948. (Need not be accomplished on Serial Nos. 42854 through 42891, 43000 through 43009, 43055, and 43061 until Service Bulletin DC-6 No. 59, Improved Aft Lounge Heating, dated September 16,1947, has been accomplished.) \n\n\tService Bulletin DC-6 No. 95, Revision-Ground Blower Duct and Check Valve and Air Duct Connection Improvement, dated October 21, 1947. (Accomplish portion covered by Service Change No. 354 and that portion of Service Change No. 358 which includes cable assemblies 1342327-502 and -504, hook No. 1342315, latch assembly 1342314, AN 960-10L, washers, AN 486-4 clevis, AN 393-11 and -13 pins, AN 380-2-2 cotters and AN 365-428 nuts.) \n\n\tIn addition to the above, the following must also be accomplished on all aircraft: \n\n\t1. Inspect the wing structure around the fuel tanks in accordance with Douglas Service Letter to all Operators dated December 29, 1947 (ref. A214TS-2521/SRD 529.37). Any damage found as a result of the inspection must be satisfactorily repaired. \n\n\t2. The Airplane Flight Manual for each airplane must be revised to include FAA-approved procedures covering "Fuel Usage," "Fire Fighting" and "SmokeEvacuation from the Cockpit." This information, pages 1 and 2 of Section I, and pages 31 through 65 of Section III, as revised February 26, 1948, for aircraft incorporating Hamilton Standard Propellers, or pages 1 and 2 of Section I, and pages 31 through 71 of Section III, as revised February 26, 1948, for aircraft incorporating Curtiss Propellers, should be obtained from the Douglas Co. \n\n\t3. Disconnect the cabin heater electrically and block off all fuel lines to this heater. \n\n\tRevised October 4, 1961. \n\n\t*Serial numbers of airplanes affected by this rework are listed on the pertinent Service Bulletin(s). Also, additional information may be obtained from the "Supplement" to "Cross Reference List-Service Changes and Modification Items" which has been prepared and revised by the Douglas Co. as of February 11 1948.
89-19-07: 89-19-07 BOEING: Amendment 39-6322. (Docket No. 89-NM-48-AD) \n\tApplicability: Model 747 series airplanes, equipped with General Electric CF6-45 and CF6-50 engines, listed in Boeing Alert Service Bulletin 747-76A2071, Revision 1, dated January 26, 1989, certificated in any category. \n\n\tCompliance: Required as indicated, unless previously accomplished. \n\n\tTo eliminate the potential for uncommanded thrust operation due to engine control cable rupture, accomplish the following: \n\n\tA.\tWithin the next 60 days or 450 flight hours after the effective date of this AD, whichever occurs first, visually inspect the thrust control cables near the idler pulley for wear and strand separation, in accordance with the accomplishment instructions of Boeing Alert Service Bulletin 747-76A2071, Revision 1, dated January 26, 1989. If wear or strand separation is identified, replace the cable prior to further flight, in accordance with the service bulletin. Repeat the inspection at intervals not to exceed 600 flight hours. \n\n\tB.\tWithin one year after the effective date of this AD, install a pressure attenuator and attaching hardware to the engine-driven hydraulic pump in accordance with the accomplishment instructions of Service Bulletin 747-76A2071, Revision 1, dated January 26, 1989. This installation constitutes terminating action for the repetitive inspections required by paragraph A., above. \n\n\tC.\tAn alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region. \n\n\tNOTE: The request should be forwarded through an FAA Principal Maintenance Inspector (PMI), who will either concur or comment and then send it to the Manager, Seattle Aircraft Certification Office. \n\n\tD.\tSpecial flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD. \n\n\tAll persons affected by this directive who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124. These documents may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 17900 Pacific Highway South, Seattle, Washington, or Seattle Aircraft Certification Office, 9010 East Marginal Way South, Seattle, Washington. \n\n\tThis amendment (39-6322, AD 89-19-07) becomes effective on October 14, 1989.
87-13-10: 87-13-10 MCDONNELL DOUGLAS: Amendment 39-5666. Applies to McDonnell Douglas Model DC-9-30, -40, and C-9 (Military) series airplanes, Fuselage Numbers 1 through 1084, certificated in any category. Compliance required as indicated, unless previously accomplished. \n\n\tTo prevent the failure of the rudder drive crank assembly, accomplish the following: \n\n\tA.\tWithin 1,000 landings or 150 days after the effective date of this AD, whichever occurs earlier, unless already accomplished within the last 2,000 landings or 7 months, eddy current or ultrasonically inspect the rudder drive crank assembly for cracks in accordance with McDonnell Douglas DC-9 Service Bulletin 27-261, Revision 1, dated April 3, 1987, or later FAA-approved revisions. \n\n\t\t1.\tIf no cracks are found, accomplish repetitive inspections at intervals not to exceed 12 months or 3,000 landings, whichever occurs earlier, until such time as the procedures described in paragraph A.3., below, are accomplished. \n\n\t\t2.\tIf crack(s) are found, before further flight, replace cracked rudder drive crank assembly with a new P/N 5912801-1 or -501 drive crank. If a new 5912801-1 drive crank assembly is used as a replacement part, inspect in accordance with paragraph A.1., above. \n\n\t\t3.\tInstallation of rudder drive crank assembly P/N 5912801-501, in accordance with McDonnell Douglas DC-9 Service Bulletin 27-261, Revision 1, dated April 3, 1987, or later FAA-approved revisions, constitutes terminating action for the repetitive inspections required by paragraph A.1., above. \n\n\tB.\tAlternate means of compliance which provide an equivalent level of safety may be used when approved by the Manager, Los Angeles Aircraft Certification Office, FAA, Northwest Mountain Region. \n\n\tC.\tUpon the request of an operator, an FAA Maintenance Inspector, subject to prior approval of the Manager, Los Angeles Aircraft Certification Office, FAA, Northwest Mountain Region, may adjust the repetitive inspection intervals specified inthis AD to permit compliance at an established inspection period of the operator if the request contains substantiating data to justify the change for that operator. \n\n\tAll persons affected by this directive who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to the McDonnell Douglas Corporation, 3855 Lakewood Boulevard, Long Beach, California 90846, Attention: Director, Publications and Training, C1-L65 (54-60). These documents may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or at 4344 Donald Douglas Drive, Long Beach, California. \n\n\tThis amendment becomes effective August 8, 1987.
2009-24-11: The FAA is adopting a new airworthiness directive (AD) for GE CF34-1A, CF34-3A, and CF34-3B series turbofan engines. This AD requires removing from service certain part number (P/N) and serial number (SN) fan blades within compliance times specified in this AD, inspecting the fan blade abradable rub strip on certain engines for wear, inspecting the fan blades on certain engines for cracks, inspecting the aft actuator head hose fitting for correct position, and, if necessary, repositioning the hose fitting. This AD results from a report of an under-cowl fire and a failed fan blade. We are issuing this AD to prevent failure of certain P/N and SN fan blades and aft actuator head hoses, which could result in an under-cowl fire and subsequent damage to the airplane.
92-16-16: 92-16-16 BOEING: Amendment 39-8326. Docket No. 91-NM-247-AD. Supersedes AD 90-21-04, Amendment 39-6759. \n\n\tApplicability: Model 767-200, -200ER, -300, and -300ER series airplanes; as listed in Boeing Alert Service Bulletin 767-27A0118, Revision 1, dated January 9, 1992; certificated in any category. \n\n\tCompliance: Required as indicated, unless accomplished previously.\n \n\tTo prevent loss of warning of incorrect take-off flap setting, and a gear-up-landing condition when flaps are set at 25 degrees, accomplish the following: \n\n\t(a)\tFor airplanes defined as Group I in Boeing Alert Service Bulletin 767-27A0118, Revision 1, dated January 9, 1992: Within 45 days after the effective date of this AD, perform a one-time visual inspection of the Flap Stabilizer Position Module (FSPM) in the P50 card file (in 3 places), to locate discrepant FSPM cards, in accordance with Boeing Alert Service Bulletin 767-27A0118, Revision 1, dated January 9, 1992. \n\n\t\t(1)\tIf any P/N 285T0099-17FSPM card is found, prior to further flight, remove that card in accordance with the Accomplishment Instructions in the service bulletin, and replace it with a P/N 285T0099-13 FSPM card. \n\n\t\t(2)\tIf no discrepancies are detected, no further action is necessary. \n\n\t(b)\tFor airplanes defined as Group II in Boeing Alert Service Bulletin 767-27A0118, Revision 1, dated January 9, 1992: Within 45 days after the effective date of this AD, perform a one-time visual inspection of the P/N 285T0099-17 FSPM in the P50 card file (in 3 places); remove all P/N 285T0099-17 FSPM cards, and visually inspect the connectors for proper pin keying, in accordance with Boeing Alert Service Bulletin 767-27A0118, Revision 1, dated January 9, 1992. \n\n\t\t(1)\tFSPM P/N 285T0099-17 cards designated "MOD A" do not need to be inspected or removed. \n\n\t\t(2)\tIf pins other than numbered parts 47 and 64 are clipped on the FSPM 285T0099-17 connector, prior to further flight, remove and repair the FSPM, reinstall, and test, in accordance with the service bulletin. \n\n\t\t(3)\tIf no discrepancies are detected, reinstall and test each P/N 285T0099-17 FSPM card in accordance with the service bulletin. \n\n\t(c)\tWithin 15 days after accomplishing the requirements of paragraph (a) and (b) of this AD, submit a report of all discrepant FSPM parts that require rework to the Manager, Manufacturing Inspection District Office, ANM-108S, FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, Washington 98055-4056; or fax (206) 227-1181. Information collection requirements contained in this regulation have been approved by the Office of Management and Budget (OMB) under the provisions of the Paperwork Reduction Act of 1980 (44 U.S.C. 3501 et seq.) and have been assigned OMB Control Number 2120-0056. \n\n\t(d)\tAs of the effective date of this AD, no person shall install a P/N 285T0099-17 FSPM unit on any airplane unless that FSPM is new or has been inspected and tested in accordance with Boeing Alert Service Bulletin 767-27A0118, Revision 1, dated January 9, 1992. \n\n\t(e)\tAn alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Seattle Aircraft Certification Office. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Seattle ACO. \n\n\tNOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Seattle ACO. \n\n\t(f)\tSpecial flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the airplane to a location where the requirements of this AD can be accomplished. \n\n\t(g)\tThe inspections, repair, and test shall be done in accordance with Boeing Alert Service Bulletin 767-27A0118, Revision 1, dated January 9, 1992. This incorporation by reference was approved by the Director of the FederalRegister in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be obtained from Boeing Commercial Airplane Group, P.O. Box 3707, Seattle, Washington 98124. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, Washington; or at the Office of the Federal Register, 800 North Capitol Street NW., 7th Floor, Suite 700, Washington, DC. \n\n\t(h)\tThis amendment becomes effective on September 28, 1992.
2009-18-01: The FAA is adopting a new airworthiness directive (AD) for CFM International, S.A. CFM56-5B1/P; -5B2/P; -5B3/P; -5B3/P1; -5B4/P; -5B4/ P1; -5B5/P; -5B6/P; -5B7/P; -5B8/P; -5B9/P; -5B1/3; -5B2/3; -5B3/3; - 5B4/3; -5B5/3; -5B6/3; -5B7/3; -5B8/3; -5B9/3; -5B3/3B1; and -5B4/3B1 turbofan engines. This AD requires initial and repetitive eddy current inspections (ECIs) of certain part number (P/N) low-pressure (LP) turbine rear frames. This AD results from a refined lifing analysis by the engine manufacturer that shows the need to identify initial and repetitive inspection thresholds for inspecting certain LP turbine rear frames. We are issuing this AD to detect low-cycle-fatigue cracks in the LP turbine rear frame, which could result in an engine separating from the airplane, causing damage to, and possibly leading to loss of control of the airplane.
88-06-06: 88-06-06 MCDONNELL DOUGLAS: Amendment 39-5879. Applies to McDonnell Douglas Model DC-10-10, -10F, -15, -30, -30F, and KC-10A (Military) series airplanes that do not have a secondary retention system installed in accordance with AD 87-07-04, certificated in any category. Compliance required as indicated, unless previously accomplished. \n\n\tTo prevent structural damage to the airplane due to engine core cowl door separation, accomplish the following: \n\n\tA.\tWithin ten days after the effective date of this AD, check the core cowl door latches in accordance with McDonnell Douglas Model DC-10 Alert Service Bulletin A71-150, Revision 1, dated January 27, 1988, or later FAA-approved revision, once each day for engine Numbers 1 and 3 (wing mounted engines) and after each core cowl door is opened and subsequently closed. \n\n\tB.\tIf the latch is open, before further flight, properly close the latch; if the latch will not engage, adjust the latch in accordance with Maintenance Manual Chapter 71-13-01, paragraph entitled "Adjustment/test core cowl doors"; if the latch cannot be properly adjusted, replace the latch prior to further flight. \n\n\tC.\tThe checks required by paragraph A., above, may be discontinued after the secondary retention system is installed in accordance with AD 87-07-04. \n\n\tD.\tAn alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety and which has the concurrence of an FAA Principal Maintenance Inspector, may be used when approved by the Manager, Los Angeles Aircraft Certification Office, FAA, Northwest Mountain Region. \n\n\tE.\tSpecial flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD. \n\n\tAll persons affected by this directive who have not already received the appropriate service information from the manufacturer may obtain copies upon request to McDonnell Douglas Corporation, 3855 Lakewood Boulevard, Long Beach, California 90846, Attention: Director of Publications, C1-L00 (54-60). This information may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or at the Los Angeles Aircraft Certification Office, 4344 Donald Douglas Drive, Long Beach, California. \n\n\tThis amendment becomes effective April 4, 1988.
89-23-02: 89-23-02 BOEING: Amendment 39-6373. Docket No. 89-NM-100-AD. \n\n\tApplicability: Model 757 and 767 series airplanes, as listed in Boeing Alert Service Bulletins 757-29A0037, Revision 1, and 767-29A0035, Revision 1, both dated November 23, 1988, certificated in any category. \n\n\tCompliance: Required within the next 6,000 hours time-in-service after the effective date of this AD, unless previously accomplished. \n\n\tTo prevent the possible complete loss of hydraulic power, accomplish the following: \n\n\tA.\tRemove and rework or replace the Ram Air Turbine (RAT) Ground Checkout Module (GCM) in accordance with Boeing Service Bulletin 757-29A0037, Revision 1, dated November 23, 1988, or Revision 2, dated August 3, 1989 (for Model 757 airplanes); or Boeing Service Bulletin 767-29A0035, Revision 1, dated November 23, 1989, or Revision 2, dated August 3, 1989 (for Model 767 airplanes); as appropriate. Prior to returning the airplane to service: \n\n\t\t1.\tIf the RAT has been operated ortested since the airplane delivery, prior to returning the airplane to service, inspect the downstream filter screen of the removed GCM. \n\n\t\t2.\tIf the screen is damaged or missing, or if GCM has been removed previously without inspecting the screen, prior to further flight, either test the RAT hydraulic pump or replace it in accordance with the applicable service bulletins. \n\n\t\t3.\tIf the RAT hydraulic pump is tested and found to be damaged, prior to further flight, replace it with a serviceable pump in accordance with the applicable service bulletin. \n\n\tB.\tAn alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region. \n\n\tNOTE: The request should be forwarded through an FAA Principal Maintenance Inspector (PMI), who will either concur or comment, and then send it to the Manager, Seattle Aircraft Certification Office. \n\n\tC.\tSpecial flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD. \n\n\tAll persons affected by this directive who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124. These documents may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 17900 Pacific Highway South, Seattle, Washington, or Seattle Aircraft Certification Office, 9010 East Marginal Way South, Seattle, Washington. \n\n\tThis amendment (39-6373, AD 89-23-02) becomes effective on December 1, 1989.