Aviation safety investigations & reports

Embraer-Empresa Brasileira De Aeronautica EMB-120 ER, VH-XFX

Investigation number:
Status: Completed
Investigation completed


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)    
State: Queensland    
Release date: 20 July 2001   Occurrence category: Technical  
Report status: Final   Highest injury level: None  

Aircraft details

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
Role Class of licence Hours on type Hours total
Pilot-in-Command ATPL 2080.0 9703
Last update 13 May 2014