NTSB Identification: DEN85LA232.
The docket is stored on NTSB microfiche number 30429.
Accident occurred Saturday, August 31, 1985 in HAYDEN, CO
Aircraft: CESSNA P210N, registration: N4780K
Injuries: 1 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

PLT SAID ENG BEGAN SURGING DURING DESCENT FROM CURISE ALT. AFTER ADJUSTING BOOST PUMP, THROTTLE, AND MIXTURE, SURGING CEASED. PLT SAID HE DROPPED FLAPS AND LOWERED LANDING GEAR AT 2000 FT AGL AND 5 MI FROM ARPT. ENG BEGAN TO SURGE AGAIN. ADJUSTMENT OF THROTTLE AND MIXTURE DID NOT CORRECT CONDITION. ENG THEN LOST ALL POWER AND PLT MADE FORCED LANDING IN WHEAT FIELD 3 MI FROM ARPT. EXAM OF ENG REVEALED UPPER DECK PRESSURE REFERENCE LINE FROM MANIFOLD TO LEFT BANK FUEL INJECTOR NOZZLE ASS'Y WAS DISCONNECTED. LINE WAS STUFFED UNDERNEATH OTHER HOSES IN THE ENG COMPARTMENT. HOSE CLAMP WAS FOUND ON METAL CHANNEL. MAINTENANCE RECORDS INDICATE ALTERNATOR WAS REPLACED 7.3 FLYING HOURS BEFORE THE ACCIDENT. UPPER DECK PRESSURE REFERENCE LINE HAD TO BE DISCONNECTED IN ORDER TO REMOVE AND REPLACE ALTERNATOR.

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

REASON FOR OCCURRENCE UNDETERMINED


Contributing Factors

IN-FLIGHT PLANNING/DECISION..IMPROPER..PILOT IN COMMAND


Contributing Factors

TERRAIN CONDITION..CROP


Contributing Factors

TERRAIN CONDITION..ROUGH/UNEVEN


Contributing Factors

GEAR EXTENSION..PREMATURE..PILOT IN COMMAND


Contributing Factors

LOWERING OF FLAPS..PREMATURE..PILOT IN COMMAND


Contributing Factors

LIGHT CONDITION..DAYLIGHT


Contributing Factors

ALTITUDE..INADEQUATE..PILOT IN COMMAND

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