Commonwealth legislation

AD/LEARJET/35 - Crew Oxygen Plumbing and Map Light Wire Protection

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

2/10 complexity

Requires installation of Learjet Airplane Modification Kit AMK 90-5 to rework cockpit map‑light wiring on specific Learjet 24 (SN 24‑100–24‑357) and 25 (SN 25‑003–25‑373) airframes, to be done before the next flight after 4 July 1993.

Affects owners/operators and certificated maintenance providers; intended to reduce in‑flight fire risk from chafing map‑light wires against oxygen tubing. Owners bear parts, labour and downtime costs; proper installation is essential for the mitigation to be effective.

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AD/LEARJET/35 - Crew Oxygen Plumbing and Map Light Wire Protection

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Gates Learjet 24 & 25 Series Aeroplanes

AD/LEARJET/35 Crew Oxygen Plumbing and Map Light Wire Protection

2/93

Applicability: All Learjet 24 and 25 series airplanes with serial numbers 24-100 to 24-357 inclusive and 25-003 to 25-373 inclusive.

Requirement: Modify the cockpit map light wiring in accordance with Learjet Airplane Modification Kit AMK 90-5 dated 11 October 1991.

Note: FAA AD 92-19-12 Amendment 39-8370 refers.

Compliance: Prior to further flight after 4 July 1993.

Background: The FAA has received a report of an in-flight fire on a Learjet Model 24 series airplane caused by chafing of the cockpit map light wires. The electrical arcing against the oxygen mask tubing caused burn-through and the subsequent fire.

Compliance with this Directive decreases the likelihood of an in-flight fire caused by map light wire chafing.

Source text

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

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