- Date
- April 27, 1975
- Place
- Chicago, IL · CHICAGO, IL
- Injuries
- 1 uninjured
- Damage
- Destroyed
- Phase of flight
- Maneuvering
- Aircraft
- N90407Sikorsky S-55B
- Status
- Completed · report September 5, 1975
- Report
- Brief approved by the director
- FAA report
- 19750427020999A
- Case key
- 149229
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
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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 ---------------------------------------------------------------------------------------------------------------------------- 3-1954 75/4/27 CHICAGO,IL SIKORSKY S-55B CR- 0 0 1 MISCELLANEOUS ATP,FLIGHT INSTR., AGE TIME - 0810 N90407 PX- 0 0 0 OTHER 49, 14218 TOTAL HOURS, DAMAGE-DESTROYED OT- 0 0 0 700 IN TYPE, INSTRUMENT RATED. DEPARTURE POINT INTENDED DESTINATION HINSDALE,IL CHICAGO,IL TYPE OF ACCIDENT PHASE OF OPERATION PROPELLER/ROTOR FAILURE: MAIN ROTOR IN FLIGHT: HOVERING HARD LANDING LANDING: POWER-OFF AUTOROTATIVE LANDING PROBABLE CAUSE(S) PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: CLUTCH ASSEMBLY MISCELLANEOUS ACTS,CONDITIONS - EXCESSIVE-WEAR/PLAY EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND FIRE AFTER IMPACT REMARKS- HOUSING(P/N S14-35-2208) BORE DIAM UP TO .0015 OVER HIGH LIMIT.
Aircraft
- Registration
- N90407
- Reported as
- Sikorsky S-55B
- Category
- Helicopter
- Engine
- reciprocating
- Damage
- Destroyed
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.