NTSB Identification: LAX84FA106.
The docket is stored on NTSB microfiche number 23090.
Accident occurred Friday, December 16, 1983 in VAN NUYS, CA
Aircraft: HILLER UH-12A, registration: N8108H
Injuries: 2 Uninjured.

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 INSTRUCTOR PLT (CFI) STATED THAT THE ENG QUIT 2 TIMES AFTER HE REFUELED THE HELICOPTER. HE THEN DRAINED A QUANTITY OF WATER FROM THE FUEL GASCOLATOR & RESTARTED THE HELICOPTER. AFTER THAT HE AIR TAXIED THE HELICOPTER TO THE FLT SCHOOL WHERE, WITHOUT SHUTTING DOWN THE ENG, HIS STUDENT BOARDED. DURING TAKEOFF, THE ENG LOST POWER AS THEY WERE CLIMBING THRU ABOUT 300 FT AGL. THE CFI EXECUTED A 180 DEG TURN & AUTOROTATED TO AN EMERGENCY LANDING ON A FLAT ROOFED BUILDING. DURING THE LANDING, THE MAIN ROTOR BLADES HIT THE TAIL BOOM & THE FRONT CROSS TUBE OF THE LANDING GEAR WAS BENT. DURING AN EXAM OF THE HELICOPTER, ABOUT 1/2 GAL OF WATER WAS DRAINED FROM THE SYS & ABOUT 8 OUNCES OF WATER WAS FOUND IN THE CARBURETOR. THE FUEL TRUCK WAS CHECKED & NO EVIDENCE OF WATER WAS FOUND.

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

AIRCRAFT PREFLIGHT..INADEQUATE..PILOT IN COMMAND(CFI)



Contributing Factors

FLUID,FUEL..WATER

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