NTSB Identification: LAX88LA123.
The docket is stored on NTSB microfiche number 39085.
Accident occurred Thursday, March 10, 1988 in ORACLE, AZ
Probable Cause Approval Date: 07/09/1990
Aircraft: HELIO HT-295, registration: N68871
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.

THE PILOT SAID THAT HE HAD COMPLETED A CATTLE SURVEY AND WAS RETURNING TO THE RANCH AIRSTRIP WHEN HE ADDED POWER TO CLIMB BACK TO PATTERN ALTITUDE. THE PILOT STATED THAT AS HE ADDED THROTTLE HE HEARD A LOUD POP AND THE ENGINE BEGAN TO LOSE POWER. THE PILOT SAID THAT HE TURNED ON THE BOOST PUMP BUT IT HAD NO EFFECT ON THE ENGINE POWER OUTPUT. THE PILOT NOTED THAT HE PUMPED THE THROTTLE AND WAS ABLE TO RESTORE LIMITED POWER; HOWEVER, THE POWER LEVEL WAS NOT ENOUGH TO MAINTAIN FLIGHT. THE AIRCRAFT SETTLED ONTO THE GROUND, TRAVELING UPSLOPE ON A HILL, AND HIT SEVERAL SMALL TREES WHICH SHEARED OFF THE LEFT LANDING GEAR. A POST CRASH FIRE CONSUMED THE AIRCRAFT. EXAMINATION OF THE AIRCRAFT REVEALED THAT ALL ENGINE ACCESSORIES WERE DESTROYED AND COULD NOT BE FUNCTIONALLY TESTED. NO INTERNAL ABNORMALITY WAS NOTED ON THE ENGINE.

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

ENGINE FAILURE FOR UNDETERMINED REASONS.

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