Results
2005-10-16: The FAA is adopting a new airworthiness directive (AD) for General Electric (GE) CF6-80E1 series turbofan engines that have an electronic control unit (ECU) with software version E.1.M. or earlier installed. This AD requires installing improved software for the ECU. This AD results from an uncommanded engine acceleration event caused by a failure of the ECU digital interface unit (DIU). We are issuing this AD to prevent an undetected failure of the ECU DIU, which could result in uncommanded acceleration to the overspeed limit without response to throttle commands. The airplane could then experience asymmetric thrust.
2016-01-15: We are adopting a new airworthiness directive (AD) for Agusta S.p.A. (Agusta) Model AB139 and AW139 helicopters. This AD requires visually inspecting certain subfloor frames for a crack. This AD was prompted by reports of cracks on in-service helicopters. The actions of this AD are intended to detect or prevent a crack in the subfloor frame, which could result in failure of the pilot and co-pilot pedal support frame and subsequent loss of control of the helicopter.
2005-10-17: This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 777-200 and -300 series airplanes, that requires modification of the bolt holes of the lower side of the body splice t-chord common to the paddle fittings of the lower wing panel. The modification includes performing a high frequency eddy current inspection of the fastener holes for cracks, repairing the hole if necessary, and replacing the fasteners with new inconel bolts. This action is necessary to prevent fatigue cracks in the lower t-chord at the bolt holes common to the paddle fittings that could result in fractures of one or more of the t-chord segments, which could lead to detachment of the lower wing panel and consequent loss of the wing. This action is intended to address the identified unsafe condition.
73-26-06: 73-26-06 BOEING: Amdt. 39-1762. Applies to all Model 727 airplanes, certificated in all categories, listed in Boeing Service Bulletin 727-32-203, Revision 3, dated November 21, 1973, or later FAA approved revisions. \n\tA.\tFor reworked torsion shafts which were not plated in a manner to provide corrosion protection as specified in Boeing Service Bulletin 727-32-203, Revision 3, dated November 21, 1973, within the next 750 landings after the effective date of this AD, unless already accomplished within the last 750 landings, and thereafter at intervals not to exceed 1500 landings since the last such inspection, inspect the shafts for cracks in accordance with such service bulletin or later FAA approved revisions. Shafts found cracked are to be replaced prior to further flight with one of the following, any one of which is terminating action. \n\t\t1)\tA shaft P/N 65-18949-1 which has never been reworked; or \n\t\t2)\tA shaft P/N 65-18949-1 which has been reworked in accordance with BoeingService Bulletin 727-32-203, Revision 3, dated November 21, 1973, or later FAA approved revisions; or \n\t\t3)\tA shaft (P/N 65-18949-1) which has been reworked in a manner approved by the Chief, Engineering and Manufacturing Branch, FAA Northwest Region; or \n\t\t4)\tA newly designed shaft as specified in and installed in accordance with Boeing Service Bulletin 727-32-205, dated March 14, 1973, or later FAA approved revisions. \n\tB.\tPrior to accumulation of 8,000 landings on a reworked torsion shaft which was not plated in a manner to provide corrosion protection, as specified in Boeing Service Bulletin 727- 32-203, Revision 3, dated November 21, 1973, or within the next 3,000 landings time in service after the effective date of this AD, whichever occurs later, replace the shaft with one of those described in A(1), A(2), A(3), or A(4). \n\tC.\tFor the purpose of this AD, when conclusive records are not available to show the number of landings accumulated by a particular shaft, the number oflandings may be computed by dividing the airplane time in service since the shaft was installed in the airplane by the operator's fleet average time per flight for his Model 727 airplanes. \n\tD.\tUpon request of the operator, an FAA maintenance inspector, subject to prior approval of the Chief, Engineering & Manufacturing Branch, FAA Northwest 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 contains substantiating data to justify the increase for that operator. \n\n\tThis Amendment becomes effective upon publication.
61-20-03: 61-20-03 RUSSELL MANUFACTURING COMPANY SAFETY BELT: Amdt. 337 Part 507 Federal Register September 20, 1961. Applies to All Aircraft Equipped With Rusco Model RM23 P/N SB1709 Safety Belts Manufactured From October 1959, through June 1960, and Equipped With D-832B Buckles. Compliance required with the next 25 hours' time in service after the effective date of this directive. Service difficulties with Rusco Model RM23, P/N SB1709, safety belt assemblies manufactured from October 1959, through June 1960, have been reported wherein the buckle cam does not securely grip the webbing thereby causing the assembly to slip. In order to determine the airworthiness of these belts, a minimum tensile load of 100 pounds must be applied to the belt assembly. If the webbing slips through the buckle as a result of this test, the belt must be considered unairworthy and replaced with an airworthy belt assembly conforming to TSO-C22 standards prior to further flight. (Russell Manufacturing Company Bulletin No. 61-5 covers this same subject.) This directive effective October 20, 1961.
74-04-01: 74-04-01 CESSNA: Amdt. 39-1783. Applies to Model 172 (Serial Numbers 17260759 through 17261495, F17200905 through F-17201034 and FR17200351 through FR17200440) series airplanes. Compliance: Required as indicated, unless already accomplished. To detect cracks in the aft fuselage bulkhead assembly and provide means for repair of cracked assemblies, accomplish the following: A) Within the next 100 hours' time in service after the effective date of this AD, visually inspect the aft fuselage bulkhead assembly (P/N 0512157-7) for cracks in accordance with Cessna Service Letter SE73-37 dated November 16, 1973, or later FAA-approved revisions. B) If as a result of any inspection required herein, cracks are found, prior to further flight, repair the bulkhead assembly in accordance with Cessna Service Kit SK 172-44. C) Any alternate methods of compliance with this AD must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region. Thisamendment becomes effective February 12, 1974.
2005-10-21: The FAA is superseding an existing airworthiness directive (AD), which applies to certain Boeing Model 747 airplanes. That AD currently requires inspections to detect cracks in the front spar pressure bulkhead chord, and repair if necessary. This new AD requires repetitive high frequency eddy current (HFEC) inspections of the body station (BS) 1000 bulkhead chord for cracks, repetitive detailed inspections of the bathtub fittings, if installed, for cracks, and corrective action if necessary. Initiation of the new inspections ends the inspections of the existing AD. This AD also revises the applicability of the existing AD to include additional airplanes. This AD is prompted by reports of cracks in the BS 1000 bulkhead chord. We are issuing this AD to detect and correct fatigue cracks in the BS 1000 bulkhead chord, which, if not repaired before they reach critical length, could result in the failure of the adjacent structure and skin and lead to in-flight depressurization of the airplane. \n\nDATES: This AD becomes effective June 23, 2005. \n\n\tThe incorporation by reference of Boeing Alert Service Bulletin 747-53A2471, dated March 27, 2003; and Boeing Service Bulletin 747-53- 2064, Revision 4, including Addendum, dated September 23, 1983; as listed in the regulations; is approved by the Director of the Federal Register as of June 23, 2005.
75-07-08: 75-07-08 SIKORSKY AIRCRAFT: Amendment 39-2138. Applies to Models S-58 and S-58T series helicopters certificted in all categories, including Military Type HSS-1, HSS-1F, HSS-1N, HUS-1, HUS-1A, HUS-1AN, HUS-1G, HUS-1Z, H-34A, H-34C, H-34J, CH-34A, CH- 34C, HH-34F, SH-34G, SH-34H, SH-34J, UH-34D, UH-34E, UH-34G, UH-34J, VH-34C, VH- 34D, equipped with S1610-31100 series rotary rudder assemblies and S1610-34200 series counterweight assembly. Compliance required as indicated. To prevent excessive stresses and possible structural failures in the tail rotor blades, tail rotor gear box assembly, and tail pylon area, from tail rotor unbalance, accomplish the following: a. Within the next 10 hours time in service after the effective date of this AD unless already accomplished, lubricate and inspect the rotary assembly, P/N S1610-31100 series and counterweight assembly, P/N S1610-34200 series, for balance in accordance with Section 2, Paragraph A of Sikorsky Service Bulletin No. 58B15-14A, dated December 19, 1974, or later FAA approved revision. b. Thereafter, lubricate and inspect at intervals not to exceed 50 hours time in service from the last inspection, or earlier if unbalance is suspected, in accordance with Section 2, Paragraph B of Sikorsky Service Bulletin No. 58B15-14A or later FAA approved revision. c. If after two consecutive 50 hour repetitive inspections as specified in Paragraph b., the rotor balance remains unchanged, and within limits, these inspections can be extended to a 100 hour interval. These 100 hour intervals can be maintained if all subsequent 100 hour inspections show that rotor balance remains unchanged. d. Rotary rudder assemblies, P/N S1610-31100 series and counterweight assembly P/N S1610-34200 series which are not balanced as specified in Paragraphs a., b., and c must be either rebalanced or removed for corrective action in accordance with Section 2, Paragraphs A and B of Sikorsky Service Bulletin No. 58B15-14A or laterFAA approved revision, before further flight. e. 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 Sikorsky Aircraft, Division of United Aircraft Corporation, Stratford, Connecticut 06602. These documents may also be examined at the Office of the Regional Counsel, New England Region, Federal Aviation Administration, 12 New England Executive Park, Burlington, Massachusetts 01803. This amendment becomes effective April 8, 1975.
61-16-05: 61-16-05 PIPER: Amdt. 311 Part 507 Federal Register July 26, 1961. Applies to PA-18/150, PA-18A/125, PA-18A/135, PA-18A/150, PA-18S/150, PA-18AS/150: Serial Numbers 18-1667, 18-1887, 18-4260, 18-4860, 18-6127, 18-6289, 18-6301, 18-6332, 18-6375, 18-6398, 18-6418, 18-6424, 18-6434, 18-6437, 18-6438, 18-6444, 18-6463, 18-6466, 18-6501, 18-6540, 18-6604, 18-6606, 18-6609, 18-6616, 18-6657, 18-6668, 18-6679, 18-6680, 18-6681, 18-6682, 18-6771, 18-6855, 18-6914, 18-6924, 18-6981, 18-6991, 18-6992, 18-6993, 18-7018, 18-7025, 18-7037, 18-7043, 18-7047, 18-7058, 18-7071, 18-7072, 18-7075, 18-7078, 18-7093. PA- 22/150, PA-22S/150, PA-22/160, PA-22S/160: Serial Numbers 22-6116, 22-6167, 22-6359, 22-6421, 22-6466, 22-6550, 22-6704, 22-6758, 22-6883. Compliance required within 10 hours' time in service after the effective date of this AD unless already accomplished. To preclude loss of control of the airplane as a result of failed nicopress sleeves in the control system, the following must be accomplished: (a) In PA-18 Series aircraft, aileron, lower elevator, and flap flexible stainless steel cable assemblies, P/N's 12794-03, 13271-02, 13745-02, 40123-44, 40123-86, 40123-87, and 10870-12 shall be replaced with respective assemblies P/N's 12794-00, 13271-00, 13745-00, 40123-03, 40123-77, 40123-76, and 10870-08, or respective assemblies P/N's 12794-04, 13271- 03, 13745-03, 14300-19, 14300-27, 14300-28, and 10870-17. (b) In PA-22 Series aircraft, aileron, lower elevator, flap and rudder cable assemblies P/N's 11527-03, 12515-04, 13108-03, 13109-13, 13109-15, 40123-83, 40123-84, and 40123-94 shall be replaced with respective cable assemblies P/N's 11527-02, 12515-03, 13108-02, 13109- 10, 13109-12, 40123-68, 40123-69, and 40123-93; or respective cable assemblies P/N's 11527- 04, 12515-06, 13108-11, 13109-18, 13109-19, 14300-24, 14300-25, and 14300-29. Standard landplane galvanized cables are satisfactory for continued or replacement use. (PiperService Bulletin Number 181 dated November 5, 1959, and Piper Service Letter No. 355, dated February 23, 1961, cover this same subject.) This supersedes AD 59-26-06. This directive effective July 26, 1961.
66-03-01: 66-03-01 BRISTOL SIDDELEY: Amdt. 39-186 Part 39 Federal Register January 28, 1966. Applies to de Havilland Model Gipsy Queen Series 30 Engines With Crankshafts With Modification 2036 or 2162 Installed. Compliance required as indicated. To prevent further failures of the crankshaft front end that could result in loss of the propeller, accomplish the following: (a) Unless already accomplished within the last 375 hours' time in service, inspect crankshaft for cracks within the next 25 hours' time in service after the effective date of this AD in accordance with Bristol Siddeley Technical News Sheet (TNS) GQ30 No. 70, dated November 16, 1965, or later ARB-approved issue, or an FAA- approved equivalent, and thereafter at intervals not to exceed 400 hours' time in service from the last inspection until modified in accordance with (c). (b) Replace cracked crankshafts before further flight with an uncracked crankshaft. (c) Incorporate Modification 2925 (which introduces shot peening underneath the chrome to improve the fatigue strength) on crankshaft within the next 1,600 hours' time in service after the effective date of this AD unless already accomplished. This directive effective January 28, 1966.