NTSB Identification: DEN85IA016.
The docket is stored on NTSB microfiche number 27124.
Scheduled 14 CFR
Incident occurred Sunday, October 21, 1984 in FORT MORGAN, CO
Aircraft: BEECH 99A, registration: N1921T
Injuries: 6 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.

CAPTAIN SHUTDOWN RT ENGINE IN-FLIGHT DUE TO A SURGING AND VIBRATION PROBLEM. THE AIRCRAFT WAS IN MODERATE ICING CONDITIONS AT THE TIME OF THE ENGINE SHUTDOWN. THE CAPTAIN WAS UNABLE TO MAINTAIN ALTITUDE AND AN EMERGENCY LANDING WAS MADE IN A CORN FIELD. POST INCIDENT EXAMINATION OF THE RT ENGINE REVEALED THAT A COMPRESSOR TURBINE BLADE HAD FAILED IN FATIGUE, CAUSING ADDITIONAL DAMAGE TO THE REMAINING BLADES. APPROXIMATELY 1 1/2 TO 2 INCHES OF ICE WERE FOUND ON VARIOUS UNPROTECTED AREAS OF THE AIRCRAFT.

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

COMPRESSOR ASSEMBLY,BLADE..FATIGUE


Contributing Factors

NACELLE/PYLON..CROP


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