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20090610010509A

Accident · Minor damage
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FAA accident report · Boeing 757222 · Denver, CO · June 10, 2009

FAA Aviation Safety Information Portal

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Date
June 10, 2009 · 12:20 local
Place
Denver, CO
Airport
Denver International
Phase of flight
Ground/Ramp/Ma
Operating rules
Air carrier (Part 121)
Operator
UALA
Damage
Minor damage
Aircraft
N570UA
NTSB investigation
NTSBENG09IA007
Reported as
Boeing 757222
Reported engine
Pratt & Whitney PW2037
People aboard
182
Fatal injuries
0
Other injuries
0
Pilot’s flight hours
9,983 total4,161 in this make and model117 in the last 90 days

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry by N-number and event date, checked against the reported make and model; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

(-23) A torch like flame was seen coming from the right engine exhaust during engine start following push back. Ground personnel signaled to the crew to shut the engine down. The flame immediately extinguished when the crew selected fuel off. The aircraft was towed back to the gate where the passengers deplaned normally, there were no injuries. There was fire damage to the lower aft wing skin, flap and flap track fairing behind the right engine. There was no apparent damage to the engine, tail cone, or pylon. The engine indicating and crew alerting system (eicas) data indicated that no N1 speed was recorded, fuel flow was abnormally high and burner pressure was recorded three times higher than normal during the aborted start. The engine was borescoped and revealed only turbine section sooting. Initial engine control system checks did not reveal any malfunctions. The right engine faults were suspected to be the N1 speed sensor and the electronic engine control (eec) unit. The engine was removed and further testing in companies' engine test cell.

As the FAA filed it

(-23) A TORCH LIKE FLAME WAS SEEN COMING FROM THE RIGHT ENGINE EXHAUST DURING ENGINE START FOLLOWING PUSH BACK. GROUND PERSONNEL SIGNALED TO THE CREW TO SHUT THE ENGINE DOWN. THE FLAME IMMEDIATELY EXTINGUISHED WHEN THE CREW SELECTED FUEL OFF. THE AIRCRAFT WAS TOWED BACK TO THE GATE WHERE THE PASSENGERS DEPLANED NORMALLY, THERE WERE NO INJURIES. THERE WAS FIRE DAMAGE TO THE LOWER AFT WING SKIN, FLAP AND FLAP TRACK FAIRING BEHIND THE RIGHT ENGINE. THERE WAS NO APPARENT DAMAGE TO THE ENGINE, TAIL CONE, OR PYLON. THE ENGINE INDICATING AND CREW ALERTING SYSTEM (EICAS) DATA INDICATED THAT NO N1 SPEED WAS RECORDED, FUEL FLOW WAS ABNORMALLY HIGH AND BURNER PRESSURE WAS RECORDED THREE TIMES HIGHER THAN NORMAL DURING THE ABORTED START. THE ENGINE WAS BORESCOPED AND REVEALED ONLY TURBINE SECTION SOOTING. INITIAL ENGINE CONTROL SYSTEM CHECKS DID NOT REVEAL ANY MALFUNCTIONS. THE RIGHT ENGINE FAULTS WERE SUSPECTED TO BE THE N1 SPEED SENSOR AND THE ELECTRONIC ENGINE CONTROL (EEC) UNIT. THE ENGINE WAS REMOVED AND FURTHER TESTING IN COMPANIES' ENGINE TEST CELL.

NTSB investigation

The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.

NTSB ENG09IA007Incident · No injuriesIncident investigationFinal reportDenver, COThere was a malfunction of the electronic engine control (EEC) burner pressure (Pb) sensor that had an abnormally high indication that resulted in an excessive amount of fuel being pumped into the engine that was still at a sub-idle condition. Because the…Jun 10, 2009 · Minor damage