Commonwealth legislation

AD/B767/69 Amdt 1 - Engine Bleed Air Crossover Duct

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Commonwealth

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legislative instrument

Plain English Summary

3/10 complexity

This directive requires every Boeing 767 operator/owner to carry out corrective work per Boeing Service Bulletin ASB 767-36A0041 to address a bleed‑air crossover‑duct rupture risk that can cause loss of pressurisation and wing anti‑icing. Work must be done by 1 April 1993 or before 7,000 flight cycles, whichever occurs later; non‑ETOPS aircraft may qualify for a timing extension. Operators must arrange and fund the mandated work. Amendment 1 moved the deadline and clarified the date/cycle test.

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AD/B767/69 Amdt 1 - Engine Bleed Air Crossover Duct

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Boeing 767 Series Aeroplanes

AD/B767/69

Amdt 1

Engine Bleed Air Crossover Duct 13/92 DM

Applicability: All Boeing 767 series aircraft.

Requirement: 1. Unless previously carried out, action IAW Boeing ASB 767-36A0041. Compliance: Prior to 1 April 1993 or accumulation of 7,000 flight cycles, whichever occurs later.

Note: Aircraft not involved in ETOPS operations may be eligible for an extension to the compliance requirements.

Background: Due to a rupture of a crossover bleed air duct loss of aircraft pressurisation, bled air to the air driven hydraulic pump, wing thermal anti-icing and also, damage to the air conditioning access panels occurred. Failure of the pressurisation may force the aircraft to descend into icing conditions with no wing anti-icing capabilities.

Amendment 1 changed Compliance by replacing 31 January 1993 with 1 April 1993 and replacing the words ‘occurs first’ with ‘occurs later’.

Source text

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

1 AD/B767/69 Amdt 1 - Engine Bleed Air Crossover Duct