- Date
- April 4, 1973
- Place
- San Antonio, TX · SAN ANTONIO, TX
- Injuries
- 1 uninjured
- Damage
- Substantial damage
- Phase of flight
- Maneuvering
- Aircraft
- N2772Bell 47G
- Status
- Completed · report May 8, 1973
- Report
- Brief approved by the director
- FAA report
- 19730404007579A
- Case key
- 170363
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 ---------------------------------------------------------------------------------------------------------------------------- 3-0651 73/4/4 SAN ANTONIO,TEX BELL 47G CR- 0 0 1 INSTRUCTIONAL COMMERCIAL, AGE 29, 202 TIME - 1000 N2772 PX- 0 0 0 TRAINING TOTAL HOURS, 21 IN TYPE, DAMAGE-SUBSTANTIAL OT- 0 0 0 NOT INSTRUMENT RATED. NAME OF AIRPORT - STINSON DEPARTURE POINT INTENDED DESTINATION SAN ANTONIO,TEX LOCAL 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: IMPROPER MAINTENANCE (MAINTENANCE PERSONNEL) ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: MAIN ROTOR GEAR BOX MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE EMERGENCY CIRCUMSTANCES - FORCED LANDING ON AIRPORT/SEAPLANE BASE/HELIPT. REMARKS- TRANSMISSION SEIZED DUE PINION GR FAILURE IN UPPER PLANETARY SYS.TAIL ROTOR DRIVE SHEARED.
Aircraft
- Registration
- N2772
- Reported as
- Bell 47G
- Category
- Helicopter
- Engine
- reciprocating
- Damage
- Substantial damage
- Airport
- Stinson
N2772Registration cancelled Sep 25, 2014 · Bell 47GAirframe modelBell 47GEngine modelFranklin 6V4 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 N2772 · 1
Matched to the same aircraft by N-number and date.