Commonwealth legislation

AD/LYC/104 - Crankshaft Drive Gear Bolts

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

2/10 complexity

CASA mandates replacement of the crankshaft drive gear bolt (P/N STD-2209) on specified Lycoming O-540-F1B5 engines (including installations in Robinson R44s), to be done within 10 hours TIS from 2 Dec 1999.

This affects aircraft owners/operators who must fund and schedule the mandatory replacement to prevent bolt failure after a reported manufacturing error; CASA issued the directive and points to the referenced FAA AD for engine serial-number applicability.

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Current sections

Direct links to the current provisions in AD/LYC/104 - Crankshaft Drive Gear Bolts.

AD/LYC/104 - Crankshaft Drive Gear Bolts

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Lycoming Piston Engines

AD/LYC/104 Crankshaft Drive Gear Bolts 12/99

Applicability: Textron Lycoming Model O-540-F1B5 engines as detailed by serial number in FAA Airworthiness Directive 99-03-05 and installed in, but not limited to, Robinson R44 helicopters.

Note: Copies of FAA AD 99-03-05 are available from CASA. CASA contact position is the Airworthiness Directive Publishing Controller. Contact number is 131 757.

Requirement: Replace crankshaft drive gear bolt part number (P/N) STD-2209. Compliance: Within 10 hours time in service from the effective date of this directive.

This Airworthiness Directive becomes effective on 2 December 1999.

Background: This directive has been issued to prevent failure of the crankshaft bolt resulting in an engine failure. The requirement follows advice of a manufacturing error in bolts supplied to the Robinson Helicopter Company.

Source text

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

1 AD/LYC/104 - Crankshaft Drive Gear Bolts