- Date
- April 13, 1967
- Place
- Tyonek, AK · TYONEK, AK
- Injuries
- 3 serious
- Damage
- Substantial damage
- Phase of flight
- Initial climb
- Aircraft
- N3070GBell 47J-2A
- Status
- Completed · report March 7, 1968
- Report
- Brief approved by the director
- Case key
- 117896
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
NTSB brief
NTSB’s brief of the accident, as it was printed: the coded facts, with the probable cause and factors.
---------------------------------------------------------------------------------------------------------------------------- FILE DATE LOCATION AIRCRAFT DATA INJURIES FLIGHT PILOT DATA F S M/N PURPOSE ---------------------------------------------------------------------------------------------------------------------------- 2-1033 67/4/13 NR.TYONEK,ALAS BELL 47J-2A CR- 0 1 0 COMMERCIAL COMMERCIAL, FL.INSTR., TIME - 1430 N3070G PX- 0 2 0 CTR PASSG-D AGE 26, 2575 TOTAL HOURS, DAMAGE-SUBSTANTIAL OT- 0 0 0 1095 IN TYPE, NOT INSTRUMENT RATED. NAME OF AIRPORT - MOBIL HELIPORT TYPE OF ACCIDENT PHASE OF OPERATION PROPELLER/ROTOR FAILURE: MAIN ROTOR TAKEOFF: INITIAL CLIMB HARD LANDING LANDING: LEVEL OFF/TOUCHDOWN PROBABLE CAUSE(S) ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: CLUTCH ASSEMBLY ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: FREE WHEEL UNIT EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON WATER REMARKS- LOSS OF POWER COUPLING TO MAIN ROTOR DUE TO SLIPPAGE OF FREE WHEELING UNIT.CAUSE NOT DETERMINED.
Aircraft
- Registration
- N3070G
- Reported as
- Bell 47J-2A
- Category
- Helicopter
- Engine
- reciprocating
- Damage
- Substantial damage
- Airport
- Mobil Heliport
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.