- Date
- March 6, 1978
- Place
- Montesano, WA · MONTESANO, WA
- Injuries
- 1 uninjured
- Damage
- Substantial damage
- Phase of flight
- Enroute
- Aircraft
- N100LMHiller Acft UH-12E
- Status
- Completed · report May 12, 1978
- Report
- Brief approved by the director
- FAA report
- 19780306006809A
- Case key
- 143254
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 ---------------------------------------------------------------------------------------------------------------------------- 3-0555 78/3/6 MONTESANO,WA HILLER ACFT UH-12E CR- 0 0 1 COMMERCIAL COMMERCIAL, AGE 36, 2925 TIME - 1100 N100LM PX- 0 0 0 OTHER TOTAL HOURS, UNK/NR IN DAMAGE-SUBSTANTIAL OT- 0 0 0 TYPE, NOT INSTRUMENT RATED. DEPARTURE POINT INTENDED DESTINATION MONTESANO,WA LOCAL TYPE OF ACCIDENT PHASE OF OPERATION PROPELLER/ROTOR FAILURE: MAIN ROTOR IN FLIGHT: OTHER ROLL OVER LANDING: POWER-OFF AUTOROTATIVE LANDING PROBABLE CAUSE(S) ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: MAIN ROTOR INTERMEDIATE GEARS MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE FACTOR(S) TERRAIN - ROUGH/UNEVEN MISCELLANEOUS ACTS,CONDITIONS - JETTISONED LOAD EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND REMARKS- CARRYING CEDAR BLOCKS. 2ND STAGE REDUCTION GEAR FAILED. LND ON HILL SIDE.
Aircraft
- Registration
- N100LM
- Reported as
- Hiller Acft UH-12E
- Category
- Helicopter
- Engine
- reciprocating
- Damage
- Substantial damage
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 N100LM · 2
Matched to the same aircraft by N-number and date.
NTSB LAX93LA319Accident · Serious injuriesLimited investigationFinal reportDixon, CAthe failure of the pilot to visually detect and avoid the guy wire.NTSB SEA85LA031Accident · Minor injuriesLimited investigationFinal reportHoquiam, WAPlt reported that while in normal cruise flight, a total loss of power occurred. Autorotation was effected in mountainous, wooded terrain. Examination of the engine showed continuity and freedom of rotation. Examination of the fuel system disclosed no…