Commonwealth legislation

AD/B737/7 - Fuselage Frames Adjacent to Forward Airstair

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Commonwealth

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legislative instrument

Plain English Summary

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This AD requires owners/operators of early Boeing 737s (Line Nos. 1–880) to inspect—and repair if needed—the fuselage frames adjacent to the forward airstair door, by following FAA AD 85‑01‑06 (excluding Section E) and Boeing Service Bulletin 737‑53A1064 Rev. 3. It responds to reported cracking that can risk sudden cabin depressurisation or airstair blowout. Operators bear inspection/repair costs and must obtain and apply the referenced documents to comply.

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AD/B737/7 - Fuselage Frames Adjacent to Forward Airstair

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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source Boeing 737 Series Aeroplanes

AD/B737/7 Fuselage Frames Adjacent to Forward Airstair 8/85

Applicability: All model 737 aircraft, Line Numbers 1 to 880.

Requirement: 1. FAA AD 85-01-06, Amendment 39-4982, up to and including Section F, but excluding Section E.

Boeing SB 737-53A1064, Revision 3. Compliance: As detailed in Requirement Document No 1.

Background: There have been numerous reports of cracking in the fuselage frames adjacent to the forward airstair doorway cut-out. Cracking of the frames and door cut-out internal doubler could result in a sudden loss of cabin pressure, and possibly blowout of the airstair door.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.