DENVER, CO, USA
N609UA
BOEING 767
THE ACFT WAS DESCENDING FROM FL 410 WITH THE THROTTLES AT IDLE. AS POWER WAS ADDED AT FL 295 THE LEFT ENG SURGED & EXCEEDED MAX EGT. 18 SECS LATER THE RIGHT ENG SURGED & EXCEEDED ITS MAX EGT. THE LEFT & RIGHT ENGS WERE SHUT DOWN AT FL 200 & 177 RESPECTIVELY. THE ENGS WERE SUCCESSFULLY RESTARTED ABOUT FL 150. THE INABILITY OF THE ENGS TO ACCELERATE AFTER THE MANUALLY INDUCED SURGE WAS DUE TO CONTAMINATED FUEL NOZZLES WHICH SIGNIFICANTLY REDUCED COMBUSTION CHAMBER EFFICIENCIES & WHICH RESULTED IN A SUBIDLE STALL.
Source: NTSB Aviation Accident Database
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