Recommendation R20020120

Recommendation issued to: Civil Aviation Safety Authority

Recommendation details
Output No: R20020120
Date issued: 12 June 2002
Safety action status:
Background: Why this Recommendation was developed

Output text

Safety Recommendation

The Australian Transport Safety Bureau recommends that the Civil Aviation Safety Authority continue to examine the circumstances of electrical discharge damage to the number-1 bearing of the Pratt and Whitney (Canada) PT6A engine models equipped with certain TRW Lucas starter-generators and develop an appropriate safety assurance strategy to ensure the continuing airworthiness of Australian registered aircraft fitted with similar engine and starter-generator combinations.

Initial response
Date issued: 16 August 2002
Response from: Civil Aviation Safety Authority
Action status: Monitor
Response text:

As acknowledged in the report, the Authority has undertaken a number of actions to ameliorate the mechanical failure. These include monitoring the airworthiness of PWC PT6A engines incorporating a starter-generator that is known to require maintenance additional to that detailed in the aircraft manufacturer's maintenance schedule.

In addition, CASA is liaising with the engine manufacturer on the development of an insulated starter-generator drive train, with the aim of eliminating the problem.

ATSB response:

Subsequent to the Federal Aviation Administration response to the ATSB recommendation R20020120 the Civil Aviation Safety Authority was asked for comment.

Further correspondence
Date issued: 20 March 2003
Response from: Civil Aviation Safety Authority
Response status: Monitor
Response text:

I refer to your note of 25 February 2003 to [CASA officer] regarding the response by the Federal Aviation Administration (FAA) to the issue of Air Safety recommendation R20020121.

In addition to the information supplied by the FAA, CASA advises the following:

CASA has already published a lengthy article on this subject in Flight Safety Australia. A copy of this article is attached for the information and consideration of the ATSB.

CASA has also issued a CAR 38 (1) Direction to commercial operators of PT6A-60 series engines and an information letter to all other PT6A operators.

Thank you for bringing the FAA's response to CASA's attention.

Last update 03 April 2012