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The aircraft was on a scheduled domestic passenger service flight from Karratha jto Perth at Flight Level 310 (31,000 ft). As the aircraft entered cloud white diverting around a large thunderstorm, there was a sudden and significant rise in the outside air temperature. A short time later, alt four engines progressively lost power and the aircraft was unable to maintain altitude. During the next 17 minutes, numerous attempts to restore engine power were made without success until, approaching 10,000 ft altitude, normal engine operation was regained. The aircraft diverted to Meekatharra where a normal landing was completed. The investigation determined that during high altitude cruise, the aircraft entered an area of moist air significantly warmer than the surrounding air. This resulted in a need to select engine and airframe anti-ice which in turn placed high bleed air demand on the engines. Under these conditions the fuel control units were unable to schedule sufficient fuel to the engines, thereby causing them to lose power, a phenomenon known as 'roll-back',
Download Final Report
[ Download PDF: 8.72MB]
General details
Date: 22 March 1992 Investigation status: Completed 
Time: 0248 WST  
Location   (show map):231 km west of Meekatharra  Investigation type: Occurrence Investigation 
State: Western Australia  
Release date: 20 February 1994  
Report status: Final Occurrence category: Incident 
 Highest injury level: None 
Aircraft details
Aircraft manufacturer: British Aerospace PLC 
Aircraft model: BAe 146 
Aircraft registration: VH-JJP 
Type of operation: Air Transport High Capacity 
Damage to aircraft: Nil 
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Last update 13 May 2014