Commonwealth legislation

AD/B727/101 Amdt 1 - Rear Pressure Bulkhead Web

RepealedCTH

This Act has been repealed and is no longer in force. It is retained for historical reference.

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

4/10 complexity

This safety directive for all Boeing 727 owners/operators requires inspection and eventual modification of the rear pressure bulkhead to detect and prevent fatigue cracks that can cause structural failure and rapid decompression. Initial and recurring inspections are mandated until a permanent modification from Boeing’s service bulletin is installed.

Aircraft repaired with the specified “-1” repair kit must receive an additional reinforcing strap; once permanently modified, aircraft are relieved of the repeated inspection cycle.

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AD/B727/101 Amdt 1 - Rear Pressure Bulkhead Web

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Boeing 727 Series Aeroplanes

AD/B727/101

Amdt 1

Rear Pressure Bulkhead Web 9/86

Applicability: All Model 727 aeroplanes.

Requirement: Inspect in accordance with Figure 1 of Boeing Alert SB 727-53A0171 Revision 1, until modified in accordance with either:

Paragraph D of the Accomplishment Instructions in Boeing Alert S.B. 727- 53A0171, Revision 1; or

2. Paragraphs E and F of the same S.B.

Note: FAA AD 86-02-06 Rev. 1 refers.

Compliance: (a) before exceeding 33,000 flights; or

(b) within the next 1,500 flights after 30 September 1986;

whichever is the later, and thereafter at intervals not exceeding 3,500 flights.

Background: This Directive implements Boeing Alert Service Bulletin 727-53-0171 Revision 1 which was raised following the discovery of cracks in thirty airframes. Cracking is attributed to fatigue under cabin pressure cycling. Amendment 1 to this Directive removes the repetitive inspection requirement for aircraft that have incorporated the preventative modification. It also requires that , within 15,000 landings after repair with the - 1 repair kit, certain aircraft must be modified by incorporation of a reinforcing strap.

Source text

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

1 AD/B727/101 Amdt 1 - Rear Pressure Bulkhead Web