Recommendation R20040084

Recommendation issued to: Pratt and Whitney (P & W)

Recommendation details
Output No: R20040084
Date issued: 15 March 2005
Safety action status:

Maintenance and repair involving the removal and refit of the variable stator vane levelling arm pins to the Pratt & Whitney PW4000 engine. This procedure involves the flaring of the pins for retaining in the synchronising ring backed up by a service bulletin edict to tack weld the pins to the ring. These procedures appear not to be successful in accomplishing the desired retention of the pins.

Refer to ASOR BO/200400726 for details.

Output text

Safety Recommendation

The Australian Transport Safety Bureau recommends that Pratt & Whitney plc review the processes used by its Singapore based overhaul joint venture to accomplish VSV ring pin flaring and compliance with service bulletin PW4ENG 72-432, to ensure the processes are appropriate and in accordance with the service bulletin.

Initial response
Date issued:
Response from: Pratt and Whitney (P & W)
Response text:
Last update 01 April 2011