- Date
- June 21, 1966
- Place
- Dillingham, AK · DILLINGHAM, AK
- Injuries
- 3 minor
- Damage
- Substantial damage
- Phase of flight
- Approach
- Aircraft
- N9786CHiller UH12EL
- Status
- Completed · report March 15, 1967
- Report
- Brief approved by the director
- Case key
- 171127
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 ---------------------------------------------------------------------------------------------------------------------------- 2-0604 66/6/21 NR.DILLINGHAM ALAS HILLER UH12EL CR- 0 0 1 COMMERCIAL COMMERCIAL, AGE 28, 2100 TIME - 1540 N9786C PX- 0 0 2 CTR PASSG-D TOTAL HOURS, 500 IN TYPE, DAMAGE-SUBSTANTIAL OT- 0 0 0 NOT INSTRUMENT RATED. TYPE OF ACCIDENT PHASE OF OPERATION ENGINE FAILURE OR MALFUNCTION LANDING: FINAL APPROACH ROLL OVER LANDING: POWER-OFF AUTOROTATIVE LANDING PROBABLE CAUSE(S) POWERPLANT - ENGINE STRUCTURE: MASTER AND CONNECTING RODS MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE MISCELLANEOUS ACTS,CONDITIONS - LACK OF LUBRICATION-SPECIFIC PART,NOT SYSTEM PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: IMPROPER MAINTENANCE (OWNER PERSONNEL) COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND REMARKS- BLM SURVEY.NO.5 AND NO.6 CONNECTING RODS,PN75548,BROKEN.ENG-124 HRS SOH.NOT PROPERLY ASSEMBLED.
Aircraft
- Registration
- N9786C
- Reported as
- Hiller UH12EL
- Category
- Helicopter
- Engine
- reciprocating
- Damage
- Substantial damage
N9786CRegistration cancelled Apr 30, 2015 · 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.
Other investigations on N9786C · 1
Matched to the same aircraft by N-number and date.