Commonwealth legislation

AD/LEARJET/29 - Aileron Trim Tab Balance Weight - Replacement

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

This AD mandates replacement of the aileron trim‑tab balance weight on specified Gates Learjet serial numbers, carried out per Gates Learjet AMK 83‑3, within 600 flight hours after 31 Dec 1984 or at the next aileron/trim‑tab removal/rebalance.

It affects owners/operators (who pay and must schedule certified maintenance) to fix an identified failsafe/possible‑flutter deficiency; expect parts, labour, and downtime impacts concentrated on the listed aircraft.

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AD/LEARJET/29 - Aileron Trim Tab Balance Weight - Replacement

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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/29 Aileron Trim Tab Balance Weight - Replacement

Applicability: All model Learjet with Serial Numbers listed in Requirement Document. Requirement: Gates Learjet AMK 83-3.

Note: FAA AD 84-19-06 refers.

12/84

Compliance: Within 600 hours time in service after 31 December 1984 or the next aileron/trim tab removal or rebalance whichever occurs first.

Background: The manufacturer has determined that the aileron trim tab balance weight is insufficient to meet the failsafe design requirements. This modification is needed to prevent possible flutter in the event of a disconnect in the trim tab system.

Source text

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