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2017-22-04: We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 737-200, -200C, -300, -400, and -500 series airplanes. This AD was prompted by reports of skin doublers that disbonded from their skin panels. This AD requires repetitive inspections of fuselage skin panels, and applicable on-condition actions. We are issuing this AD to address the unsafe condition on these products.
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60-20-01: 60-20-01 AERO COMMANDER: Amdt. 204 Part 507 Federal Register September 28, 1960. Applies to Models 680-E and 720, Serial Numbers 501, 623 Through 873 Except 820, 850, 860, 867 and 872.
Compliance required within the next 100 hours' time in service after the effective date of this amendment.
The manufacturer's inspection has determined a nonconformity with the approved design data and it is possible that aircraft in service may have the following nonconformity:
AN 426AD-5 rivets have been installed instead of 3/16-inch huckbolts in the lower surface of the wing at the rear spar between wing station 54 and the inboard nacelle attach angle on both the left and right wings.
(a) Inspection. Inspect the lower wing at rear spar between wing station 54 and the inboard nacelle attach angles on both the left and right wings to determine whether 3/16-inch huckbolts or AN 426AD-5 rivets have been installed. If the AN 426AD-5 rivets are installed, the wing shall be reworked as outlined in paragraph (b).
(b) Rework. Remove flaps and wing trailing edge closeout skins on both left and right wings. Drill out the AN 426AD-5 rivets and replace with AN 426AD-6 rivets. These rivet heads will protrude below the wing surface by approximately 0.030 inch. Do not overdrive the rivets in an attempt to sink them completely.
Measure the distance between the rivet which passes through the wing skin and rear spar cap at wing station 54 and the screw which passes through the inboard nacelle attach angle. This distance should be approximately 4.5 inches and should contain six rivets (0.75 inch on center) and the screw. If only five rivets exists in this area, a brazier head rivet (AN 456AD-6) must be added between the nacelle attach angle screw and the next rivet inboard. If sufficient space does not exist to permit minimum rivet to rivet spacing of three rivet diameters, contact the Service Department, Aero Design & Engineering Company for approved repairinstructions.
Replace flaps and left and right wing trailing edge skins. (Aero Design Service Bulletin No. 62 covers this same subject.)
This directive effective October 28, 1960.
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63-15-06: 63-15-06 PIAGGIO: Amdt. 591 Part 507 Federal Register July 24, 1963. Applies to Model P.166 Aircraft, Serial Numbers 1, through 403.
Compliance required within 25 hours' time in service after the effective date of this AD.
To preclude failure of the elevator trim tab control system and lever, P/N 5069, because of unsound welding seams, accomplish the following:
(a) Inspect right and left levers, P/N's 5069.03 and 5069.02, respectively, for cracks or unsatisfactory machining in accordance with Piaggio Service Bulletin No. 166-30 dated February 1, 1963.
(b) If any defects specified in the service bulletin are found, before further flight replace the lever with a lever inspected and found to have no defects.
This directive effective August 23, 1963.
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2017-21-08: We are adopting a new airworthiness directive (AD) for all Airbus Model A310 series airplanes. This AD was prompted by a revision of certain airworthiness limitation items (ALI) documents, which require more restrictive maintenance requirements and airworthiness limitations. This AD requires revising the maintenance or inspection program to incorporate the maintenance requirements and airworthiness limitations. We are issuing this AD to address the unsafe condition on these products.
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2017-21-04: We are adopting a new airworthiness directive (AD) for certain Gulfstream Aerospace LP Model Gulfstream G150 airplanes. This AD was prompted by a report indicating that the main entrance door (MED) opened during flight, and by the determination that the ``CABIN DOOR UNLOCK'' crew alerting system (CAS) message may extinguish before the handle latch pin is fully engaged. This AD requires accomplishing an updated rigging procedure for the adjustment of the MED microswitch. We are issuing this AD to address the unsafe condition on these products.
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2017-21-03: We are adopting a new airworthiness directive (AD) for certain Gulfstream Aerospace LP Model Gulfstream 100, Astra SPX, and 1125 Westwind Astra airplanes. This AD was prompted by a report indicating that the main entrance door (MED) opened during flight, and by the determination that the ``CABIN DOOR UNLOCK'' crew alerting system (CAS) message may extinguish before the handle latch pin is fully engaged. This AD requires accomplishing an updated rigging procedure for the adjustment of the MED microswitch. We are issuing this AD to address the unsafe condition on these products.
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60-16-01: 60-16-01 BEECH: Amdt. 186 Part 507 Federal Register August 4, 1960. Applies to All Model C45G, C45H, TC45G, and TC45H Airplanes Which Have Been Converted From Military Status to Civil Certification.
Compliance required not later than October 1, 1960.
The emergency position switch of the electrical turn and bank indicator that bypasses the master switch arrangement contrary to CAR 3.688, must be removed. The live wire connected to the switch must be disconnected at the battery terminal and either removed from the airplane or carefully insulated and secured.
Passenger seats (P/N 734-183302) which partially block the emergency exit must be removed, relocated, or reversed to provide a clear and unobstructed opening as required by CAR 3.387. Two configurations of seat P/N 734-183302 were delivered to the military only one of which has been structurally substantiated for aft facing mounting. This seat can be identified by the triangular shaped closed rear leg formed from 2 sheets of 0.040 alal with a long stiffening bead on the outer face of the leg. FAA approval must be obtained for any modification of the seating arrangement, other than removing or reversing (if applicable) the obstructing seat.
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61-13-01: 61-13-01 CONVAIR: Amdt. 297 Part 507 Federal Register June 20, 1961. Applies to All Model 22 (880) Aircraft.
Instances of fire due to overheating of Bussman 60 and 70 amp type ACO and ACY limiters in the freon compressor and recirculation fan motor circuits have occurred. To preclude fires of this type, the following modifications must be accomplished:
Unless already accomplished, compliance with items (a) and (b) is required within the next 130 hours' time in service:
(a) Replace the Bussman 60 and 70 amp type ACO and ACY limiters and their holders which are located in the AC power distribution box with type AHB limiters and their holders.
(b) Replace the nameplates adjacent to the 60 and 70 amp limiters with similar nameplates made of a fire resistant material such as impregnated fiberglass.
(Convair Service Bulletin No. 24-42 covers this same subject.)
This directive effective June 20, 1961.
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64-28-02: 64-28-02 HUGHES: Amendment 39-617. Applies to Models 269A, 269A-1, 269A-2 and 269B helicopters.
Compliance required as indicated.
Due to inadequate lubrication of the main rotor blade flapping hinge bearings, binding has occurred, resulting in overstressing and failure of one main rotor blade. To prevent main rotor blade overstressing and failure, accomplish the following:
(a) For helicopters having less than 100 hours' time in service on the effective date of this AD inspect the main rotor blade flapping hinge bearings for the condition indicated in (d), prior to the accumulation of 110 hours' time in service, unless already accomplished, and thereafter at periods not to exceed 400 hours' time in service from the last inspection.
(b) For helicopters having 100 hours' or more time in service on the effective date of this AD inspect the main rotor blade flapping hinge bearings for the condition indicated in (d), within the next 10 hours' time in service, unless already accomplished within the last 390 hours' time in service, and thereafter at periods not to exceed 400 hours' time in service from the last inspection.
(c) Within 10 hours' time in service, after the effective date of this AD, unless already accomplished within the last 15 hours' time in service, and thereafter at periods not to exceed 25 hours' time in service, apply MIL-G-25537 grease through the grease fittings to all main rotor blade flapping hinge bearings and inspect to ascertain that a thorough purging of the bearings has been achieved.
If new grease does not exude from all six bearings, inspect the bearings at the location where the grease does not exude, for the condition indicated in (d), before further flight.
(d) If bearings are found to be worn or damaged in excess of the limits specified in Hughes Service Information Notice No. 2A-39.1, 2A-1-06.1 or 2B-07-.1, remove from service before further flight.
(e) If the inner race of any bearing is found to be brinelled or worn in excess of the 0.002 inch limit specified in Hughes Service Information Notice No. 2A-39.1, 2A-1-06.1 or 2B- 07.1, remove the corresponding main rotor blade from service before further flight, and conspicuously mark it to prevent inadvertent return to service.
(f) If the inner race of any bearing is brinelled or worn, but not in excess of the 0.002 inch limit specified in Hughes Service Information Notice No. 2A-39.1, 2A-1-06.1 or 2B- 07.1, inspect the corresponding main rotor blade for skin cracks in the exposed areas adjacent to the edges of the blade root fitting beside the outboard bolt. Inspect both upper and lower surfaces of the blade, using a 4- to 6-power magnifying glass. If any cracks are found remove the blade from service before further flight.
(g) Starting with the effective date of this AD, conduct initial and repetitive inspections of all main rotor blades in a manner and at periods specified in Hughes Service Information NoticesNo. 2A-38 dated September 9, 1964, No. 2A-1-05 dated September 14, 1964, and No. 2B-06 dated September 16, 1964, or later revisions approved by FAA Western Region Aircraft Engineering Division.
(h) The following Hughes Service Information Notices or later FAA approved revisions are approved alternatives to those specified in (d), (e), (f) and (g) above:
Notice No. N-10.1 dated December 14, 1967, is an approved alternate to Notices 2A-38, 2A-1-05 and 2B-06.
Notice No. N-47 dated April 18, 1968, is an approved alternate to Notices 2A-39.1, 2A- 1-06.1 and 2B-07-.1.
This amendment becomes effective on July 6, 1968.
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2017-20-13: We are adopting a new airworthiness directive (AD) for PIAGGIO AERO INDUSTRIES S.p.A. Model P-180 airplanes. This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as disbonding of the upper and lower metal skin from the honeycomb core on the elevator assembly and other flight control surfaces. We are issuing this AD to require actions to address the unsafe condition on these products.
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