NTSB Identification: DEN92IA007.
The docket is stored on NTSB microfiche number 45371.
Scheduled 14 CFR operation of UNITED AIRLINES
Incident occurred Wednesday, October 30, 1991 in COLORADO SPRING, CO
Probable Cause Approval Date: 05/05/1993
Aircraft: DOUGLAS DC-10-10, registration: N1808U
Injuries: 57 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.

AS THE AIRCRAFT APPROACHED 50 KIAS ON THE TAKEOFF ROLL, IT DRIFTED RIGHT. THE FIRST OFFICER, WHO WAS MAKING THE TAKEOFF, CORRECTED WITH LEFT RUDDER. RIGHT DRIFT BECAME MORE PRONOUNCED AND HARD LEFT RUDDER WAS USED. THE CAPTAIN TOOK OVER, RETARDED ALL THREE THROTTLES, THEN ATTEMPTED TO REGAIN CONTROL BY USING ASYMMETRICAL THRUST. WHEN THIS FAILED, THE THROTTLES WERE RETARDED AND REVERSE THRUST APPLIED. POST INCIDENT INSPECTION DISCLOSED NO APPARENT DAMAGE. THE NEXT MORNING, A DIFFERENT CREW REJECTED THE TAKEOFF WHEN THE NO. 3 ENGINE FAILED. POST INCIDENT DISASSEMBLY AND INSPECTION OF THE ENGINE DISCLOSED METAL IN THE TAILPIPE, SAND AND MUD IN THE COMPRESSOR SECTION, AND A 13TH STAGE AND TWO 14TH STAGE COMPRESSOR BLADES BROKEN OFF, CAUSING EXTENSIVE DAMAGE TO BOTH THE LOW AND HIGH PRESSURE TURBINES.

The National Transportation Safety Board determines the probable cause(s) of this incident to be:

THE CAPTAIN'S INADEQUATE SUPERVISION AND THE COPILOT'S FAILURE TO MAINTAIN DIRECTIONAL CONTROL. FACTORS WERE: THE CROSSWIND AND SNOW/ICE ON THE RUNWAY.

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