- Date
- August 7, 1981
- Place
- Bellevue, WA · BELLEVUE, WA
- Injuries
- 2 fatal
- Damage
- Destroyed
- Phase of flight
- Maneuvering
- Aircraft
- N4247Sikorsky S-58B
- Status
- Completed · report February 16, 1982
- Report
- Brief approved by the director
- FAA report
- 19810807048269A
- Case key
- 124153
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 ---------------------------------------------------------------------------------------------------------------------------- 3-3276 81/8/7 BELLEVUE,WA SIKORSKY S-58B CR- 2 0 0 COMMERCIAL ATP,FLIGHT INSTR., AGE TIME - 0825 N4247 PX- 0 0 0 CONSTRUCTION 42, 9500 TOTAL HOURS, 380 DAMAGE-DESTROYED OT- 0 0 0 IN TYPE, NOT INSTRUMENT RATED. DEPARTURE POINT INTENDED DESTINATION SEATTLE,WA LOCAL TYPE OF ACCIDENT PHASE OF OPERATION FIRE OR EXPLOSION: IN FLIGHT IN FLIGHT: HOVERING PROBABLE CAUSE(S) PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: IMPROPERLY SERVICED AIRCRAFT (GROUND CREW) ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: MAIN ROTOR GEAR BOX MISCELLANEOUS - FOREIGN OBJECT DAMAGE MISCELLANEOUS ACTS,CONDITIONS - RPM-UNCONTROLLABLE-OVERSPEED POWERPLANT - COOLING SYSTEM: OTHER MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE FACTOR(S) MISCELLANEOUS ACTS,CONDITIONS - JETTISONED LOAD FIRE AFTER IMPACT REMARKS- FOD TO INPUT GR,MAIN BEVEL GR.OIL COOLER REPLACED 5/5.SERVICING AT OIL FILLER OPENS MRGB CASE.
Aircraft
- Registration
- N4247
- Reported as
- Sikorsky S-58B
- Category
- Helicopter
- Engine
- reciprocating
- Damage
- Destroyed
N4247Registration cancelled Jun 18, 2013 · Sikorsky S-58BAirframe modelSikorsky S-58BEngine modelWright C9HE 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 N4247 · 2
Matched to the same aircraft by N-number and date.