Commonwealth legislation

AD/R44/7 - Clutch Assembly

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Commonwealth

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legislative instrument

Plain English Summary

2/10 complexity

Owners/operators of Robinson R44 helicopters S/N 0001–0322 fitted with C018‑1 sprag clutches must replace them with C018‑2 or C018‑2A assemblies per Robinson R44 Service Bulletin 23 (30 May 1997). Compliance is mandatory within 50 flight hours of the directive (effective 4 Dec 1997) or by 31 Dec 1997. The action responds to reports of excessive wear that could cause loss of power transmission or compromise autorotation; owners bear parts, labour and downtime costs.

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Direct links to the current provisions in AD/R44/7 - Clutch Assembly.

AD/R44/7 - Clutch Assembly

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Robinson R44 Series Helicopters

AD/R44/7 Clutch Assembly 13/97

Applicability: All R44 helicopter S/N 0001 through to and including 0322 fitted with C018-1 clutch assembly.

Requirement: Replace C018-1 clutch assembly with a C018-2 or C018-2A clutch assembly as detailed in Robinson R44 SB 23 dated 30 May 1997.

Note: FAA AD 97-16-02 Amdt 39-10092 refers.

Compliance: Unless previously carried out within 50 hours time in service after the effective date of this directive or by 31 December 1997, whichever occurs first.

This airworthiness directive becomes effective on 4 December 1997.

Background: The manufacturer has advised that a number of sprag clutches assemblies were found worn excessively. This could result in loss of power to the rotor system, or should engine failure occur, an inability of the helicopter to autorotate in an emergency.

Source text

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

1 AD/R44/7 - Clutch Assembly