Commonwealth legislation

AD/B737/1 Amdt 2 - Cockpit Side Window - F-N Window Post

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Commonwealth

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legislative instrument

Plain English Summary

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This Airworthiness Directive requires owners/operators of Boeing 737 aeroplanes (serial numbers 1–447) to inspect the cockpit “F‑N” window post using visual, eddy‑current and X‑ray methods in accordance with Boeing Service Bulletin 737‑53‑1023 Revision 11, at the thresholds and intervals given in that SB (Requirement; Compliance). It responds to repeated cracking in the region on 707/727/737 airframes and places inspection, repair and modification obligations and costs on affected operators (Background; AD/B737/40 reference).

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Direct links to the current provisions in AD/B737/1 Amdt 2 - Cockpit Side Window - F-N Window Post.

AD/B737/1 Amdt 2 - 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 737 Series Aeroplanes

AD/B737/1

Amdt 2

Cockpit Side Window - “F-N” Window Post 7/95

Applicability: Boeing 737 serial numbers 1 to 447.

Requirement: Inspect visually, by eddy current and by X-ray, as applicable, the “F-N” window post in accordance with Boeing Service Bulletin (SB) 737-53-1023, 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 737- 53-1023, 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 B737 Ageing Aircraft Structures Working Group as a safety of flight item and requires the area to be modified; Directive AD/B737/40 refers. Amendment 1 extended the inspection area to structure above the cockpit window.

Amendment 2 revises the Applicability.

Source text

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

1 AD/B737/1 Amdt 2 - Cockpit Side Window - F-N Window Post