Commonwealth legislation

AD/B727/89 Amdt 4 - Cockpit Side Window - F-N Window Post

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Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

5/10 complexity

Requires operators of Boeing 727s (line numbers 1–1164) to inspect the cockpit “F‑N” window post using visual, eddy‑current and X‑ray methods, following Boeing Service Bulletin 727‑53‑0086 Revision 11, at the thresholds and intervals set out in that bulletin. The Civil Aviation Safety Authority requires compliance; operators bear the cost of inspections, any modifications, and repairs. The directive follows multiple reported cracks and has been amended to extend the inspected area and to correct which aircraft are covered.

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Current sections

Direct links to the current provisions in AD/B727/89 Amdt 4 - Cockpit Side Window - F-N Window Post.

AD/B727/89 Amdt 4 - Cockpit Side Window - F-N Window Post

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/B727/89

Amdt 4

Cockpit Side Window - “F-N” Window Post 8/95

Applicability: B727 line numbers 1 to 1164 inclusive.

Requirement: Inspect visually, by eddy current and by X-ray as applicable, the “F-N” window post in accordance with Boeing Service Bulletin (SB) 727-53-0086, Revision 11.

Note: FAA AD 93-05-17 refers.

Compliance: Inspect at the thresholds and intervals specified in Tables I and II of Boeing SB 727-53-0086, Revision 11.

Background: One hundred and sixty two cracks have been experienced on 707, 727 and 737 aircraft in the subject region, including aircraft that have been modified and repaired to earlier issues of the SB. This SB has been identified by the B727 Ageing Aircraft Structures Working Group as a safety of flight item and requires the area to be modified, Directive AD/B727/118 refers.

Amendment 3 extended the inspection area to the structure above the cockpit window.

Amendment 4 corrects the applicability.

Source text

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

1 AD/B727/89 Amdt 4 - Cockpit Side Window - F-N Window Post