NTSB Identification: DCA83IA035.
The docket is stored on NTSB microfiche number 26408.
Scheduled 14 CFR UNITED AIRLINES
Incident occurred Friday, August 19, 1983 in DENVER, CO
Aircraft: BOEING 767, registration: N609UA
Injuries: 205 Uninjured.
NTSB investigators used data provided by various sources and may not have traveled in support of this investigation to prepare this aircraft incident report.
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.
The National Transportation Safety Board determines the probable cause(s) of this incident to be:FUEL SYSTEM,NOZZLE..CONTAMINATION
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