Commonwealth legislation

AD/ECUREUIL/46 - Tail Rotor Drive Shaft Bearings

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legislative instrument

Plain English Summary

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This directive requires owners/operators of specified Eurocopter AS350 variants fitted with tail-rotor drive-shaft bearings (P.9107.NPP7 FAFNIR) that lack an “X” mark to carry out the DGAC-prescribed technical actions (and Aerospatiale telex details) by 30 August 1991 or before issue of the Australian C of A. It targets aircraft accepted in mid‑1991 (or earlier with <100 hours). Operators bear compliance costs and the regulator may withhold certification; the measure addresses risk of corroded bearings seizing the tail rotor drive.

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AD/ECUREUIL/46 - 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 350 (Ecureuil) Series Helicopters

AD/ECUREUIL/46 Tail Rotor Drive Shaft Bearings 11/91

Applicability: All AS 350 helicopters versions B, D, B1, B2, L1 and AVEX 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 91-159-060 (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. 01-34 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/ECUREUIL/46 - Tail Rotor Drive Shaft Bearings