Commonwealth legislation

AD/FSM/30 - Mixture Control Shaft Retention Screw

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Commonwealth

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legislative instrument

Plain English Summary

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The Directive mandates fitting a metal retainer clip (P/N 55‑A239) to the mixture control shaft of specified Precision Airmotive HA‑6 carburettors to prevent shaft movement and possible fuel‑flow interruption. Owners/operators of affected aircraft must obtain and install the clip per the named service bulletin at their expense; the requirement took effect 2 Mar 1995 with compliance by 31 Dec 1995.

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AD/FSM/30 - Mixture Control Shaft Retention Screw

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Fuel Supply and Metering Equipment

AD/FSM/30 Mixture Control Shaft Retention Screw 3/95

Applicability: Precision Airmotive Corporation Model HA-6 series carburettors as detailed in Precision Airmotive Corporation Mandatory Service Bulletin No. MSA-6.

Requirement: Install retainer clip P/N 55-A239 in accordance with Precision Airmotive Corporation Mandatory Service Bulletin No. MSA-6 or Marvel Schebler Service Bulletin No. A1- 78.

Note: FAA Airworthiness Directive 94-25-04 refers.

Compliance: Effective 2 March 1995: Unless previously accomplished; prior to 31 December 1995.

Background: This Directive has been issued to require the installation of a retainer clip to the mixture control assembly. The requirement follows advice that excessive wear on the mixture control shaft retention screw can result in the mixture shaft moving out of position and a resultant interruption to fuel flow.

Source text

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

1 AD/FSM/30 - Mixture Control Shaft Retention Screw