Commonwealth legislation

AD/AS 355/38 - Tail Rotor Drive Shaft Bearings

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Commonwealth

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legislative instrument

Plain English Summary

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This AD requires operators of certain Eurocopter AS 355 E/F/F1/F2/N helicopters with bearing P/N P.9107.NPP7 FAFNIR (without an "X" on the seal flange) to inspect and, if needed, replace tail-rotor drive-shaft bearings because corrosion could cause seizure. It affects owners/operators and maintenance providers by imposing inspection/repair actions (per referenced DGAC/Aerospatiale guidance), potential grounding or C of A delays, and the direct costs and logistical burdens of compliance.

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AD/AS 355/38 - Tail Rotor Drive Shaft Bearings

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Eurocopter AS 355 (Twin Ecureuil) Series Helicopters

AD/AS 355/38 Tail Rotor Drive Shaft Bearings 11/91

Applicability: All AS 355 helicopters versions E, F, F1, F2 and N equipped with P/N P.9107.NPP7 FAFNIR tail rotor drive shaft bearings not marked with an “X” on the seal flange.

Requirement: Action in accordance with the Technical Requirements of DGAC AD 91-158-044 (B) for all aircraft acceptance tested by Aerospatiale Marignane between 15 May 1991 and 20 July 1991 or prior to 15 May 1991 and have operated less than 100 hours time in service.

Note: Aerospatiale Telex Service No. 01-35 refers.

Compliance: By 30 August 1991 or prior to issue of Australian C of A, whichever occurs first. Background: Corroded bearings which could seize may have been fitted to the tail rotor drive shaft.

Source text

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

1 AD/AS 355/38 - Tail Rotor Drive Shaft Bearings