Commonwealth legislation

AD/B727/61 Amdt 2 - Rear Pressure Bulkhead Vertical Beams

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

This Airworthiness Directive requires operators of Boeing 727-100, -100C and -200 aeroplanes (fuselage numbers 1–743) to inspect rear pressure-bulkhead vertical beams following Boeing Alert Service Bulletin 727-53A0173 Revision 1 to detect cracking that could cause rapid decompression. Installing reinforcing angle doublers per SB 727-53-55 (Revision 3 or later) is a terminating action; older installations require an extra one‑time inspection. Compliance follows the Directive’s Requirement Document and is carried out and funded by the aircraft operator.

JSON API

Deep dive

Want the full deep dive?

Zoe can write the in-depth analysis on top of the summary above: how it works, who it affects and what each part actually does.

Current sections

Direct links to the current provisions in AD/B727/61 Amdt 2 - Rear Pressure Bulkhead Vertical Beams.

AD/B727/61 Amdt 2 - Rear Pressure Bulkhead Vertical Beams

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 727 Series Aeroplanes

AD/B727/61

Amdt 2

Rear Pressure Bulkhead Vertical Beams 6/86

Applicability: Models 727-100, -100C and -200 aircraft with fuselage numbers 1 to 743.

Requirement: Inspect in accordance with Boeing Alert Service Bulletin No. 727-53A0173 Revision 1.

Note: FAA AD 85-20-03 refers.

Compliance: As detailed in the Requirement Document.

Note: Installation of reinforcing angle doublers on the vertical beam lower ends in accordance with the Requirement Document or SB 727-53-55 (Revision 3 or later issues) constitutes terminating action for the inspections. Aircraft modified in accordance with SB 727-53-55 Revision 2 or earlier issues require an additional one- time inspection.

Background: An FAA AD has been issued because of recent reports of multiple vertical beam cracks. In one case the web was also cracked. Undetected cracks could lead to rapid decompression in flight. No Australian registered aircraft are affected at the time of issue of this Directive amendment. This amendment has become necessary because the manufacturer has re-arranged some of its SBs. SB 727-53A0173 now contains all the information relating to the vertical beams.

Background: An FAA AD has been issued because of recent reports of a multiple vertical beam cracks. In one case the web was also cracked. Undetected cracks could lead to rapid decompression in flight. No Australian registered aircraft are affected at the time of issue of this Directive amendment. This amendment has become necessary because the manufacturer has re-arranged some of its SBs. SB 727-53A0173 now contains all the information relating to the vertical beams.

Source text

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

1 AD/B727/61 Amdt 2 - Rear Pressure Bulkhead Vertical Beams