NTSB Identification: ANC83LU001.
The docket is stored on NTSB microfiche number 22170.
Accident occurred Sunday, March 20, 1983 in CHUGIAK, AK
Aircraft: WASPAIR HM-81 TOMCAT TOUR, registration: NONE
Injuries: 1 Serious.

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

A TEST PLT & DEALER FOR THE MANUFACTURER INSPECTED THE ULTRALIGHT VEHICLE & MADE ADJUSTMENTS PRIOR TO MAKING A TEST FLIGHT AFTER IT WAS ASSEMBLED. HE STATED THAT BEFORE TAKEOFF, HE WAS HAVING PROBLEMS SETTING THE CARBURETOR MIXTURE & THAT THE THROTTLE CABLE WAS NOT WORKING WELL. DURING EARLIER TAXI TESTS, THE ENG CEASED OPERATING A NUMBER OF TIMES. FINALLY, ON THE LAST TAXI TEST, THE ENG OPERATED AT FULL RPM & HE ELECTED TO TAKEOFF. AFTER TAKEOFF, THE ULTRALIGHT CLIMBED TO ABOUT 100 FT AGL, THEN BEGAN TO LOSE POWER. THE PLT WAS UNABLE TO GLIDE TO A CLEARING & SUBSEQUENTLY CRASHED INTO TREES. THE VEHICLE REMAINED IN THE TREES & THE PLT REMAINED SECURE BY HIS LAP BELT & SHOULDER HARNESS. HOWEVER, AFTER HE RELEASED HIS RESTRAINT SYSTEM, HE WAS INJURED WHEN HE FELL APRX 40 FT TO THE GROUND. THE TEMP & DEW POINT WERE 40 & 36 DEG, RESPECTIVELY. ACCORDING TO ICING PROBABILITY CURVES, SERIOUS ICING WOULD HAVE BEEN POSSIBLE AT CRUISE POWER. HOWEVER, ICING WAS NOT VERIFIED. THERE WAS NO PROVISION FOR CARBURETOR HEAT.

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

REASON FOR OCCURRENCE UNDETERMINED


Contributing Factors

OBJECT..TREE(S)

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