NTSB Identification: NYC82FFA05
14 CFR Part 91: General Aviation
Accident occurred Sunday, May 16, 1982 in HANCOCK, NY
Probable Cause Approval Date: 05/16/1983
Aircraft: NAVION A, registration: N91662
Injuries: 2 Serious,2 Minor.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

THE PILOT REPORTED THAT DURING TAKEOFF, HE CLIMBED TO ABOUT 20 TO 30 FT AND RAISED THE GEAR. AT ABOUT THAT TIME, THE AIRCRAFT BEGAN TO SINK. HE STATED THAT HE PULLED THE POWER OFF JUST BEFORE THE AIRCRAFT HIT THE GROUND A FEW MILES FROM THE AIRPORT. AN INVESTIGATION REVEALED THAT THE FLAPS WERE NOT DAMAGED, AS IF THEY WERE NOT EXTENDED DURING IMPACT. HOWEVER, THE FLAP CONTROL WAS FOUND IN THE DOWN POSITION. THE FLAPS WERE FOUND ABOUT 20 DEG DOWN AND THE FLAP INDICATOR WAS INDICATING ABOUT 1/3 DOWN. THE INVESTIGATOR CAPPED OFF A BROKEN LANDING GEAR HYDRAULIC LINE AND FILLED THE HYDRAULIC RESERVOIR, BUT THE HAND PUMP WOULD NOT OPERATE DUE TO AIR IN THE SYSTEM THE ENGINE WAS THEN RUN, AND AFTER THAT, THE HYDRAULIC SYSTEM OPERATED NORMALLY. THE PILOT SUSPECTED THAT THE FLAPS CAME UP WHEN HE RAISED THE GEAR AFTER TAKEOFF. THIS AIRCRAFT WAS EQUIPPED WITH A FLAP SYSTEM THAT WAS TO BE SET EITHER FULL UP OF FULL DOWN. AN INTERMEDIATE SELECTION WOULD NOT INSURE A POSITIVE SELECTED POSITION.

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

HYDRAULIC SYSTEM..UNDETERMINED


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