- Date
- April 23, 1973
- Place
- Billings, MT · BILLINGS, MT
- Injuries
- 2 uninjured
- Damage
- Substantial damage
- Phase of flight
- Enroute
- Aircraft
- N204ZBell 47G-3B
- Status
- Completed · report June 7, 1973
- Report
- Brief approved by the director
- FAA report
- 19730423009869A
- Case key
- 190773
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 ---------------------------------------------------------------------------------------------------------------------------- 3-0903 73/4/23 NR.BILLINGS,MONT BELL 47G-3B CR- 0 0 2 COMMERCIAL COMMERCIAL, AGE 25, 1559 TIME - 1130 N204Z PX- 0 0 0 POWER/PIPELINE TOTAL HOURS, 145 IN TYPE, DAMAGE-SUBSTANTIAL OT- 0 0 0 NOT INSTRUMENT RATED. DEPARTURE POINT INTENDED DESTINATION BILLINGS,MONT LOCAL TYPE OF ACCIDENT PHASE OF OPERATION ENGINE FAILURE OR MALFUNCTION IN FLIGHT: NORMAL CRUISE ROLL OVER LANDING: POWER-OFF AUTOROTATIVE LANDING PROBABLE CAUSE(S) POWERPLANT - ENGINE STRUCTURE: MASTER AND CONNECTING RODS MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE TERRAIN - ROUGH/UNEVEN COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND REMARKS- NR 5 CONROD BOLTS FAILED.LND ON 30 DEG SLOPE IN WOODED CLEARING. PIPELINE SURVEILLANCE FLT.
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.
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.
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 SEA72FTA17Accident · No injuriesClosedHarlowton, MTNTSB MIA69F0341Accident · Minor injuriesClosedKingsport, TN