Commonwealth legislation

AD/B747/33 Amdt 2 - Wing Trailing Edge Flap Tracks

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Commonwealth

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legislative instrument

Plain English Summary

3/10 complexity

This AD mandates compliance with Boeing Service Bulletin SB747-57A2225 Rev.4 for Boeing 747s (line numbers 1–584, excluding the B747SP) to detect and fix corrosion and cracking in wing trailing‑edge flap track aft webs. Issued by CASA to eliminate a water‑ingress driven structural risk, it makes inspections/modifications mandatory and places cost and implementation responsibility on operators.

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AD/B747/33 Amdt 2 - Wing Trailing Edge Flap Tracks

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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 747 Series Aeroplanes

AD/B747/33

Amdt 2

Wing Trailing Edge Flap Tracks 8/90

Applicability: Model B747 line numbers 1 through 584 except B747SP. Requirement: Action in accordance with Boeing SB747-57A2225 Rev. 4.

Note: FAA AD 83-21-02 refers.

Compliance: As detailed in the Requirement Document.

Background: Water accumulation in the track aft cavity has resulted in corrosion and consequent aft web cracking. Amendment 1 references the latest revision of the Requirement document, which adds terminating action. Amendment 2 clarifies aircraft affected.

Source text

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