NTSB Identification: ANC83LA035.
The docket is stored on NTSB microfiche number 20410.
Accident occurred Wednesday, January 19, 1983 in ANCHORAGE, AK
Aircraft: BELL 47G-2, registration: N2822B
Injuries: 1 Minor.

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 HELICOPTER MADE A LANDING DURING WHICH THE TAIL BOOM WAS SEVERED. THIS WAS A DUAL INSTRUCTIONAL FLIGHT AND ACCORDINGTO THE INSTRUCTOR, A HIGH RECONNAISSANCE WAS PERFORMED BEFORE SELECTING THEIR APPROACH TO THE PINNACLE. THE PINNACLE IS A 3000 FOOT LANDING AREA UNOBSTRUCTED FOR 360 DEGREES AROUND THE PINNACLE AND IS WIDELY USED BY HELICOPTER OPERATORS FORPINNACLE PRACTICE. THE INSTRUCTOR STATED THAT HE NORMALLY WOULD NOT DO PINNACLE WORK WITH A FULL LOAD OF FUEL. BECAUSE THE STUDENT WAS READY FOR A CHECKRIDE, EXCEPT FOR THE PINNACLE WORK, THE IP ELECTED TO DO IT IMMEDIATELY. HE SELECTED ANAPPROACH TO THE WEST BECAUSE HE SAID HE SAW NO BLOWING SNOW. AT 20 FEET AGL HE NOTED HIGH SINK RATE AND HE ADDED POWER AS HE TOOK CONTROL, BUT THE HELICOPTER CONTINUED TO SETTLE WITH POWER. THE ACFT HIT HARD IN A LEVEL ATTITUDE AND THE TAILBOOM WAS SEVERED. INVESTIGATION IMMEDIATELY AFTER THE ACCIDENT SHOWED BLOWING SNOW WHICH INDICATED A WIND FROM THE EAST.

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

IN-FLIGHT PLANNING/DECISION..IMPROPER..PILOT IN COMMAND(CFI)

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

WEATHER EVALUATION..INADEQUATE..PILOT IN COMMAND(CFI)

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

REMEDIAL ACTION..DELAYED..PILOT IN COMMAND(CFI)


Contributing Factors

WEATHER CONDITION..HIGH DENSITY ALTITUDE


Contributing Factors

WEATHER CONDITION..TAILWIND


Contributing Factors

PROPER DESCENT RATE..NOT POSSIBLE..DUAL STUDENT


Contributing Factors

TERRAIN CONDITION..MOUNTAINOUS/HILLY


Contributing Factors

TERRAIN CONDITION..SNOW COVERED

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