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Recommendation issued to: Civil Aviation Safety Authority

Recommendation details
Output No: R20010196
Date issued: 18 September 2001
Safety action status:
Background: Why this Recommendation was developed

Output text

The Australian Transport Safety Bureau recommends that the Australian Civil Aviation Safety Authority take appropriate action to ensure the continued airworthiness of Australian registered aircraft fitted with Turbomeca Arriel engines incorporating modification TU204.

Initial response
Date issued: 25 February 2002
Response from: Civil Aviation Safety Authority
Action status: Monitor
Response text:

I refer to your letter dated 18 September 2001 notifying CASA of Air Safety Recommendations which relate to Occurrence No. 200103038 on the serious incident involving a Sikorsky S76C helicopter, VH-EXX, which occurred 45km east of Longford Helicopter Landing Site, Vic on 11 July 2001. Please accept my apologies for the delay in my reply.

In response to the Recommendations R20010192 and R20010196, CASA advises the following:

Recommendation R20010196

The Australian Transport Safety Bureau recommends that the Civil Aviation Safety Authority take appropriate action to ensure the continued airworthiness of Australian registered aircraft fitted with Turbomeca Arriel engines incorporating modification TU204. CASA has been advised that the engine manufacturer, Turbomeca, cancelled the incorporation of Modification TU 204 in 1998. The DGAC has advised of action to be taken to address engines in service incorporating TU204. CASA notes that the DGAC, in advice to the ATSB dated 31 December 2001, advises the DGAC will be issuing an Airworthiness Directive to require the mandatory removal of turbine blades incorporating modification TU 204. The Directive is to be limited to single engine helicopters. CASA will review the DGAC Airworthiness Directive on its receipt and advise the ATSB of the results of that review. CASA looks forward to receiving a final briefing on the conclusions of the ATSB investigation of Occurrence No. 200103038. Thank you for referring this matter to the attention of the Authority.

Further correspondence
Date issued: 24 August 2002
Response from: Civil Aviation Safety Authority
Response status: Closed - Accepted
Response text:

Thank you for providing a copy of Air Safety Occurrence Report 200103038 on the serious incident involving Sikorsky S76C which occurred 83km east of Longford Helicopter Landing Site, Victoria on 11 July 2001.

The Occurrence Report incorporates Recommendation 20010196:

The Australian Transport Safety Bureau recommends that the Australian Civil Aviation Authority take appropriate action to ensure the continued airworthiness of Australian registered aircraft fitted with Turbomeca Arriel engines incorporating modification TU204.

CASA's response included that it would review the Direction Generale de I'Aviation Civile Airworthiness Directive on its receipt and advise ATSB on the results of that review. The review has been completed and CASA has issued Airworthiness Directive AD/ARRIEL/16 with effect from 8 August 2002.

I believe the Authority's action in respect of this Report has been finalised.

 
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Last update 01 April 2011