Commonwealth legislation

AD/B747/124 - H-11 Steel Bolts

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Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

4/10 complexity

This Airworthiness Directive requires owners/operators of specific Boeing 747s (line numbers 641–708; excludes -400 series) to follow the inspection, corrective-action and replacement measures set out in FAA AD 94-07-06 (with Boeing Service Bulletin 747-51-2048 noted). It responds to reported cracked H‑11 steel bolts and aims to prevent attachment-bolt failures. Compliance costs, downtime and procedural specifics fall to the affected operators, who must obtain and follow the referenced technical documents.

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AD/B747/124 - H-11 Steel Bolts

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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/B747/124 H-11 Steel Bolts 7/94

Applicability: Model 747 series aircraft with line numbers 641 through 708, excluding Model 747- 400 series aircraft.

Requirement: Action in accordance with the technical requirements of FAA AD 94-07-06 Amendment 39-8864.

Note: Boeing SB 747-51-2048 refers.

Compliance: As specified in the Requirement Document.

Background: Reports were received of cracked and fractured H-11 steel bolts installed at certain locations of the airframe structure. The actions specified in this Directive are intended to prevent the failure of attachment bolts at critical locations.

Source text

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