Commonwealth legislation

AD/EC 135/2 - Tail Rotor Drive Shaft Bearing Attachment Flange

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legislative instrument

Plain English Summary

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This Airworthiness Directive requires operators of Eurocopter EC 135 helicopters (serial numbers 0005–0120) to inspect the tail-rotor drive-shaft bearing attachment flange following Eurocopter Alert Service Bulletin EC135‑53A‑010 Revision 2 (Applicability; Requirement).

Inspections must be done before further flight after 24 December 1999 and before installing an additional bearing-support bracket, with further action as specified in the service bulletin. The measure is intended to prevent flange fracture that could cause serious helicopter malfunction (Compliance; Background).

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AD/EC 135/2 - Tail Rotor Drive Shaft Bearing Attachment Flange

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Eurocopter EC 135 Series Helicopters

AD/EC 135/2 Tail Rotor Drive Shaft Bearing Attachment Flange 2/2000

Applicability: All Model EC 135 helicopters, serial numbers 0005 through 0120.

Requirement: Inspect in accordance with Eurocopter Deutschland Alert Service Bulletin EC 135- 53A-010 Revision 2.

Note: LBA AD 1999-199/3 refers.

Compliance: Before further flight after 24 December 1999 for the initial inspection, and before the installation of the additional bearing support bracket, unless already accomplished.

Action, thereafter as specified in the Requirement document.

This Airworthiness Directive becomes effective on 24 December 1999.

Background: A report was received of a crack that was detected on the attachment flange of the tail rotor drive shaft bearing. Initial and repeat inspections are introduced that are intended to prevent a fracture of the bearing attachment flange of the tail rotor drive shaft, which could result in serious malfunction of the helicopter.

Source text

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

1 AD/EC 135/2 - Tail Rotor Drive Shaft Bearing Attachment Flange