Commonwealth legislation

AD/B747/18 - Lower Cargo Doorway Lower Sill Truss and Latch Support Fitting - Inspection

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

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This AD requires operators and maintenance organisations of all Boeing 747 models to inspect the lower sill truss and latch support fittings on forward and lower cargo doorways for corrosion, cracking and blocked drainage paths, using the referenced FAA AD and Boeing Service Bulletin. CASA enforces the requirement in Australia. It matters because detecting and correcting these defects preserves airworthiness; operators bear the inspection, repair or replacement costs and associated downtime.

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AD/B747/18 - Lower Cargo Doorway Lower Sill Truss and Latch Support Fitting - Inspection

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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/B747/18 Lower Cargo Doorway Lower Sill Truss

and Latch Support Fitting - Inspection

11/79

Applicability: All models.

Document: 1. FAA AD 79-17-02, Amdt. 39-3526;

(Boeing SB 747-53-2200 refers). Compliance: As per requirement document No. 1.

Background: Overseas it has been found that the 7079-T6 truss and related 7079-T6 latch support fittings on the lower sill of forward and lower cargo doorways can exhibit corrosion, cracking and blocked drainage paths.

Source text

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