- Date
- April 27, 1972
- Place
- Harlowton, MT · HARLOWTON, MT
- Injuries
- 3 uninjured
- Damage
- Substantial damage
- Phase of flight
- Enroute
- Aircraft
- N204ZBell 47G-3B
- Status
- Completed · report February 14, 1973
- Report
- Brief approved by the director
- Case key
- 166002
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 ---------------------------------------------------------------------------------------------------------------------------- 3-1958 72/4/27 HARLOWTON,MONT BELL 47G-3B CR- 0 0 3 COMMERCIAL COMMERCIAL, AGE 28, 2610 TIME - 1230 N204Z PX- 0 0 0 MAPPING/PHOTO TOTAL HOURS, 325 IN TYPE, DAMAGE-SUBSTANTIAL OT- 0 0 0 NOT INSTRUMENT RATED. DEPARTURE POINT INTENDED DESTINATION HARLOWTON,MONT LOCAL TYPE OF ACCIDENT PHASE OF OPERATION ENGINE FAILURE OR MALFUNCTION IN FLIGHT: NORMAL CRUISE HARD LANDING LANDING: POWER-OFF AUTOROTATIVE LANDING PROBABLE CAUSE(S) POWERPLANT - ENGINE STRUCTURE: PISTON,PISTON RINGS MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M. PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND REMARKS- BROKEN PISTON RING FOUND ON TEAR DOWN
Aircraft
- Registration
- N204Z
- Reported as
- Bell 47G-3B
- Category
- Helicopter
- Engine
- reciprocating
- Damage
- Substantial damage
N204ZRegistration cancelled Oct 4, 2002 · Bell 47G-3BAirframe modelBell 47G-3BEngine modelLycoming TVO-435-GIA
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.
Other investigations on N204Z · 3
Matched to the same aircraft by N-number and date.
NTSB DEN83LA002Accident · No injuriesLimited investigationFinal reportNr. Englewood, COPilot was practicing maneuvers for certification test. He said he made a precautionary landing due to suspected engine trouble and a fire started under the aircraft in the grass. He exited the aircraft but left battery and radio on. This investigation…NTSB SEA73FTA06Accident · No injuriesClosedBillings, MTNTSB MIA69F0341Accident · Minor injuriesClosedKingsport, TN