Aviation safety investigations & reports

Embraer-Empresa Brasileira De Aeronautica EMB-110P1, VH-UQD

Investigation number:
200001335
Status: Completed
Investigation completed

Summary

During descent into Cairns, the pilot of the Embraer EMB-110 observed the right engine fire warning annunciator illuminate. The pilot then conducted the quick reference handbook `fire during flight phase' checks, which included shutting down the right engine. During these checks the fire warning annunciator extinguished, and as there was no visual indication of fire or smoke, the pilot elected not to discharge the engine fire bottle. The quick reference handbook allows for an 8-second wait after the engine is shut down. If the fire warning persists then the fire extinguisher should be discharged. The pilot advised Air Traffic Control and the aircraft passengers of the engine shutdown. An uneventful single engine approach and landing was successfully completed.

The engine fire detection system consists of two independent circuits for each engine. The sensors are located in the hot section, accessories section and the generator cooling air discharge, and are connected to a control box. When a fire or overheat condition is detected a fire warning light will illuminate in the T handle for the affected engine, the master caution light will illuminate and the fire horn will sound.

Investigation by the operator's maintenance organisation found that three fire detector sensors had failed, resulting in a false fire warning. The failed sensors were found to contain moisture. The operator indicated that the aircraft had operated in rain shortly before the incident flight.

Safety Action

The maintenance organisation has indicated that it will ensure that the sealant on the fire detection sensors is adequate to seal against moisture ingestion.

General details
Date: 19 April 2000   Investigation status: Completed  
Time: 1235 hours EST    
Location   (show map): 52 km W Cairns, Aero.    
State: Queensland    
Release date: 30 April 2001    
Report status: Final   Occurrence category: Incident  
  Highest injury level: None  

Aircraft details

Aircraft details
Aircraft manufacturer Embraer-Empresa Brasileira De Aeronautica  
Aircraft model EMB-110  
Aircraft registration VH-UQD  
Serial number 110-208  
Type of operation Air Transport Low Capacity  
Damage to aircraft Nil  
Departure point Normanton, QLD  
Departure time 1118 hours EST  
Destination Cairns, QLD  
Crew details
Role Class of licence Hours on type Hours total
Pilot-in-Command ATPL 2500.0 8550
Last update 13 May 2014