- Date
- May 17, 1975
- Place
- Maunetuk River, AK · MAUNETUK RIVER, AK
- Injuries
- 1 uninjured
- Damage
- Substantial damage
- Phase of flight
- Enroute
- Aircraft
- N5335VHiller Acft UH12-E
- Status
- Completed · report November 4, 1975
- Report
- Brief approved by the director
- FAA report
- 19750517038599A
- Case key
- 149116
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 ---------------------------------------------------------------------------------------------------------------------------- 3-3331 75/5/17 NR.MAUNETUK RIVER,AK HILLER ACFT UH12-E CR- 0 0 1 COMMERCIAL COMMERCIAL, AGE 31, 1718 TIME - 1210 N5335V PX- 0 0 0 AIR TAXI-CARGO TOTAL HOURS, 317 IN TYPE, DAMAGE-SUBSTANTIAL OT- 0 0 0 NOT INSTRUMENT RATED. DEPARTURE POINT INTENDED DESTINATION DAHL CREEK,AK AVARET LAKE,AK TYPE OF ACCIDENT PHASE OF OPERATION ENGINE FAILURE OR MALFUNCTION IN FLIGHT: NORMAL CRUISE COLLIDED WITH: TREES LANDING: POWER-OFF AUTOROTATIVE LANDING PROBABLE CAUSE(S) POWERPLANT - ENGINE STRUCTURE: MASTER AND CONNECTING RODS MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE MISCELLANEOUS ACTS,CONDITIONS - PREVIOUS DAMAGE FACTOR(S) TERRAIN - HIGH OBSTRUCTIONS COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND FIRE AFTER IMPACT REMARKS- NR 4 PISTON CONROD BOLTS FAILED. BELIEVE EXCESSIVE RPMS PREV APPLIED.
Aircraft
- Registration
- N5335V
- Reported as
- Hiller Acft UH12-E
- Category
- Helicopter
- Engine
- reciprocating
- Damage
- Substantial damage
N5335VRegistration cancelled May 22, 2017 · Hiller UH-12EAirframe modelHiller UH-12EEngine modelLycoming VO-540 series
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 N5335V · 2
Matched to the same aircraft by N-number and date.