- Date
- February 27, 1968
- Place
- Windna, AZ · WINDNA, AZ
- Injuries
- 2 minor
- Damage
- Substantial damage
- Phase of flight
- Maneuvering
- Aircraft
- N9780CHiller UN-12L
- Status
- Completed · report March 22, 1968
- Report
- Brief approved by the director
- Case key
- 111736
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 ---------------------------------------------------------------------------------------------------------------------------- 3-0265 68/2/27 WINDNA,ARIZ HILLER UN-12L CR- 0 0 1 COMMERCIAL COMMERCIAL, AGE 40, 6000 TIME - 1400 N9780C PX- 0 0 1 CTR PASSG-D TOTAL HOURS, 200 IN TYPE, DAMAGE-SUBSTANTIAL OT- 0 0 0 NOT INSTRUMENT RATED. TYPE OF ACCIDENT PHASE OF OPERATION ENGINE FAILURE OR MALFUNCTION IN FLIGHT: HOVERING COLLIDED WITH: TREES IN FLIGHT: EMERGENCY DESCENT PROBABLE CAUSE(S) POWERPLANT - ENGINE STRUCTURE: VALVE ASSEMBLIES MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND FIRE AFTER IMPACT REMARKS- FAILURE OF NO 2 CYL EXHAUST VALVE.
Aircraft
- Registration
- N9780C
- Reported as
- Hiller UN-12L
- Category
- Helicopter
- Engine
- reciprocating
- Damage
- Substantial damage
N9780CRegistration cancelled May 30, 2013 · Hiller UH-12LAirframe modelHiller UH-12LEngine 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.
Other investigations on N9780C · 3
Matched to the same aircraft by N-number and date.