Commonwealth legislation

AD/B747/146 - Engine Strut Wing Seal

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Commonwealth

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legislative instrument

Plain English Summary

2/10 complexity

The Civil Aviation Safety Authority mandates that operators of specified Boeing 747s (CF6‑45/50 or JT9D‑fitted, per Boeing Service Bulletin 747‑28‑2160/Rev 1) install a physical seal at each engine‑strut/wing front spar junction to contain fuel leakage, following a reported ground fire. Compliance (and costs for parts, labour and downtime) is required before 16 September 1996; the AD parallels an FAA directive and relies on the Boeing service bulletin for technical details.

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Direct links to the current provisions in AD/B747/146 - Engine Strut Wing Seal.

AD/B747/146 - Engine Strut Wing Seal

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Boeing 747 Series Aeroplanes

AD/B747/146 Engine Strut Wing Seal 6/95

Applicability: Model 747 series aircraft equipped with General Electric CF6-45 or CF6-50 engines, or Pratt & Whitney JT9D series engines; as listed in Boeing Service Bulletin 747-28- 2160, Revision 1.

Requirement: Install a seal on the wing front spar at each engine strut in accordance with Boeing Service Bulletin 747-28-2160, or 747-28-2160 Revision 1.

Note: FAA AD 95-02-07 Amdt 39-9126 refers.

Compliance: Prior to 16 September 1996.

Background: The FAA received a report of a fire that occurred due to fuel leakage from the fuel line coupling in the engine strut area along the wing front spar, while the aircraft was on the ground after engine shutdown. This Directive requires certain actions that are intended to ensure that fuel leakage is contained within the strut drainage area.

Source text

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

1 AD/B747/146 - Engine Strut Wing Seal