Commonwealth legislation

AD/LEARJET/20 - Upper Cabin Door Lock Mechanism Bolts - Modification

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

2/10 complexity

This AD mandates installation of Gates Learjet Kit No. AMK 79‑9 on specified Learjet 24 and 25 serial-numbered aeroplanes to modify the upper cabin door lock mechanism bolts (drilled and lockwired). Owners/operators of the listed aircraft must arrange and pay for the retrofit, performed by maintenance providers, within 150 hours time in service after 30 April 1980. The measure is prescriptive and intended to enhance cabin‑door security.

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AD/LEARJET/20 - Upper Cabin Door Lock Mechanism Bolts - Modification

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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 Gates Learjet 24 & 25 Series Aeroplanes

AD/LEARJET/20 Upper Cabin Door Lock Mechanism

Bolts - Modification

Applicability: All model 24 with S/Nos. 24-100 to 24-357,

All model 25 with S/Nos. 25-003 to 25-291.

3/80

Requirement: Modify the upper cabin door lock mechanism bolts by installing Gates Learjet Kit No. AMK 79-9.

Compliance: Within 150 hours time in service after 30 April 1980.

Background: Modification kit AMK 79-9 provides an additional safety feature to the upper cabin door lock mechanism by installing drilled bolts and lockwiring these bolts in situ.

Source text

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