Commonwealth legislation

AD/B727/153 - Main Landing Gear Manual Extension Gearbox

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Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

CASA requires operators of all Boeing 727 series aeroplanes to inspect the main landing‑gear manual‑extension gearbox per FAA AD 98‑04‑29 after reports that incorrect 7079‑T6 aluminium housings may suffer stress‑corrosion cracking and could prevent the gear locking. The directive took effect 21 May 1998; the initial inspection must be completed by 21 November 1998 and continuing inspections follow the FAA AD.

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Direct links to the current provisions in AD/B727/153 - Main Landing Gear Manual Extension Gearbox.

AD/B727/153 - Main Landing Gear Manual Extension Gearbox

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Boeing 727 Series Aeroplanes

AD/B727/153 Main Landing Gear Manual Extension Gearbox 6/98

Applicability: All Model 727 series aircraft.

Requirement: Inspect in accordance with the technical requirements of FAA AD 98-04-29 Amdt 39- 10341.

Note: Boeing Service Bulletin 727-32-279 refers.

Compliance: Before 21 November 1998 for the initial inspection and thereafter in accordance with FAA AD 98-04-29 Amdt 39-10341.

This airworthiness directive becomes effective on 21 May 1998.

Background: The FAA received a report indicating that a manual gearbox assembly which contained an incorrect housing, was installed on a Model 727 series aircraft. Incorrect housings are manufactured from 7079-T6 aluminium and may fail as a result of stress corrosion cracking, and ultimately result in an inability to lock the main landing gear in a down position during landing.

Source text

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

1 AD/B727/153 - Main Landing Gear Manual Extension Gearbox