Commonwealth legislation

AD/LEARJET 35/12 - Upper Cabin Door Locking Mechanism - Modification

RepealedCTH

This Act has been repealed and is no longer in force. It is retained for historical reference.

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

2/10 complexity

This Airworthiness Directive requires owners of Gates Learjet 35 (S/N 35-001–35-167) and Learjet 36 (S/N 36-001–36-038) fitted with the 36‑inch cabin door to modify the upper cabin door locking mechanism by installing Gates Learjet Kit No. AMK 78‑2.

Compliance is required before reaching 3,000 flight hours (or within 100 flight hours after 31 March 1980 for aircraft already above 3,000 hours). The modification prevents a silent lock failure that can leave the door unsecured in flight.

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Direct links to the current provisions in AD/LEARJET 35/12 - Upper Cabin Door Locking Mechanism - Modification.

AD/LEARJET 35/12 - Upper Cabin Door Locking Mechanism - Modification

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Gates Learjet 35 and 36 Series Aeroplanes

AD/LEARJET 35/12 Upper Cabin Door Locking Mechanism - Modification

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Applicability: All models 35 with S/Nos. 35-001 to 35-167 and 36 with S/Nos. 36-001 to 36-038, fitted with the 36 inch cabin door.

Requirement: Modify the handle mechanism by installing Gates Learjet Kit No. AMK 78-2.

Compliance: 1. For those aeroplanes which have achieved 3000 hours time in service - within 100 hours time in service after 31 March 1980.

For those aeroplanes which have not achieved 3000 hours time in service - before achieving 3000 hours time in service.

Background: If the cabin door locking mechanism fails during the door closing operation this fact will not be apparent to the crew and a door “unsafe” condition could exist.

Source text

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

1 AD/LEARJET 35/12 - Upper Cabin Door Locking Mechanism - Modification