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While cruising at FL140, the pilot in command of the Brasilia noticed a torque drop from 84% to 74% on the right engine. Assuming that the power lever friction was loose and had allowed the engine to creep back from the selected power setting, he readjusted the lever position back to 84% and reset the friction. Approximately 10 seconds later the non-flying pilot remarked that the right engine torque had dropped to 76%. As the pilot in command again went to readjust the torque, the engine lost power. The aircraft then yawed significantly.

The crew then shut down the engine and feathered the propeller. As the aircraft was flying into a 40 to 50 knot headwind, the crew decided to return to the departure airfield.

Company maintenance investigation found that the hydro-mechanical unit (HMU) on the right engine had malfunctioned. The HMU was removed and forwarded to the vendor for further investigation. A serviceable HMU was fitted to the right engine and the aircraft returned to service.

General details
Date: 23 April 2001 Investigation status: Completed 
Time: 1800 hours EST  
Location   (show map):83 km W Dalby (ALA) Investigation type: Occurrence Investigation 
State: Queensland  
Release date: 20 July 2001  
Report status: Final Occurrence category: Technical 
 Highest injury level: None 
Aircraft details
Aircraft manufacturer: Embraer-Empresa Brasileira De Aeronautica 
Aircraft model: EMB-120 
Aircraft registration: VH-XFX 
Serial number: 120-116 
Type of operation: Air Transport Low Capacity 
Damage to aircraft: Nil 
Departure point:Brisbane, QLD
Departure time:1723 EST
Destination:Roma, QLD
Crew details
RoleClass of licenceHours on typeHours total
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Last update 13 May 2014