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WestJet Encore WEN3532

Printed page 24. PDF page 24.

re-ingestion in the engine nacelle. Pratt & Whitney's examination determined that the fuel-rich mixture was created by the engine control system reacting to the engine power loss and increasing fuel flow to attempt a power recovery, however, the engine was
Open official document at PDF page 24Air Transportation Safety Investigation Report A23P0020: Engine compressor failure and fire

WestJet Encore WEN3532

Printed page 25. PDF page 25.

breach and an uncontrolled spread of fire in the nacelle. During the occurrence, when the fuel-rich mixture was exhausted into the exhaust duct, it contributed to the hot exhaust gases that were subsequently re-ingested into the nacelle via the engine
Open official document at PDF page 25Air Transportation Safety Investigation Report A23P0020: Engine compressor failure and fire

WestJet Encore WEN3532

Printed page 28. PDF page 28.

increasing the fuel flow to attempt a power recovery. This added fuel resulted in a fuel-rich mixture that was exhausted into the exhaust duct, resulting in a fire that led to hot exhaust gases being re- ingested into the nacelle.
Open official document at PDF page 28Air Transportation Safety Investigation Report A23P0020: Engine compressor failure and fire

WestJet Encore WEN3532

Printed page 30. PDF page 30.

increasing the fuel flow to attempt a power recovery. This added fuel resulted in a fuel-rich mixture that was exhausted into the exhaust duct, resulting in a fire that led to hot exhaust gases being re-ingested into the nacelle. 3.2
Open official document at PDF page 30Air Transportation Safety Investigation Report A23P0020: Engine compressor failure and fire

WestJet Encore WEN3532

Printed page 23. PDF page 23.

Fuel flow increased from 1432 pounds per hour to 1538 pounds per hour, which created a fuel-rich environment within the combustion chamber and exhaust duct assembly. Although the engine did not flame out despite the surge and power loss, it
Open official document at PDF page 23Air Transportation Safety Investigation Report A23P0020: Engine compressor failure and fire