- Date
- August 12, 1971
- Place
- Valdez, AK · VALDEZ, AK
- Injuries
- 2 fatal
- Damage
- Destroyed
- Phase of flight
- Enroute
- Aircraft
- N5096VSikorsky S-55B
- Status
- Completed · report April 20, 1972
- Report
- Brief approved by the director
- Case key
- 162145
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 ---------------------------------------------------------------------------------------------------------------------------- 3-3388 71/8/12 VALDEZ,ALAS SIKORSKY S-55B CR- 1 0 0 COMMERCIAL COMMERCIAL, AGE 28, 3893 TIME - 1427 N5096V PX- 1 0 0 AIR TAXI-PASSG TOTAL HOURS, 186 IN TYPE, DAMAGE-DESTROYED OT- 0 0 0 NOT INSTRUMENT RATED. NAME OF AIRPORT - VALDEZ DEPARTURE POINT INTENDED DESTINATION VALDEZ,ALAS LOCAL TYPE OF ACCIDENT PHASE OF OPERATION PROPELLER/ROTOR FAILURE: MAIN ROTOR IN FLIGHT: NORMAL CRUISE COLLISION WITH GROUND/WATER: UNCONTROLLED IN FLIGHT: UNCONTROLLED DESCENT PROBABLE CAUSE(S) PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: MAIN ROTOR GEAR BOX MISCELLANEOUS ACTS,CONDITIONS - BRITTLE MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE FACTOR(S) MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT FIRE AFTER IMPACT REMARKS- IMPROPERLY HEAT TREATED PART INSTLD IN MAIN TSMN.VENDOR,SOURCE NOT IDENTD.TSMN,ROTOR HEAD SEPN.
Aircraft
- Registration
- N5096V
- Reported as
- Sikorsky S-55B
- Category
- Helicopter
- Engine
- reciprocating
- Damage
- Destroyed
- Airport
- Valdez
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 N5096V · 2
Matched to the same aircraft by N-number and date.