- Date
- November 24, 1971
- Place
- Greeley, CO · GREELEY, CO
- Injuries
- 8 uninjured
- Damage
- Substantial damage
- Phase of flight
- Enroute
- Aircraft
- N21FWBeech 99A
- Status
- Completed · report June 27, 1972
- Report
- Brief approved by the director
- Safety recommendations
- Yes
- Case key
- 79398
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 ---------------------------------------------------------------------------------------------------------------------------- 1-0026 71/11/24 NR.GREELEY,COLO BEECH 99A CR- 0 0 2 SCHED DOM PASSG SRV AIRLINE TRANSPORT, AGE TIME - 1912 N21FW PX- 0 0 6 41, 16236 TOTAL HOURS, DAMAGE-SUBSTANTIAL OT- 0 0 0 125 IN TYPE, INSTRUMENT RATED. OPERATOR - FRONTIER AIRLINES,INC. DEPARTURE POINT INTENDED DESTINATION CHEYENNE,WYO DENVER,COLO TYPE OF ACCIDENT PHASE OF OPERATION PROPELLER/ROTOR FAILURE: PROPELLER IN FLIGHT: DESCENDING ENGINE TEARAWAY IN FLIGHT: DESCENDING PROBABLE CAUSE(S) POWERPLANT - PROPELLER AND ACCESSORIES: BLADES MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE PERSONNEL - PRODUCTION-DESIGN-PERSONNEL: OTHER FACTOR(S) MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT MISCELLANEOUS ACTS,CONDITIONS - VIBRATION,EXCESSIVE EMERGENCY CIRCUMSTANCES - PRECAUTIONARY LANDING ON AIRPORT SUSPECTED OR KNOWN AIRCRAFT DAMAGE REMARKS- R PROP BLADE FAILED DUE FATIGUE INDUCED BY IMPROPER MACHINING IN BALANCE HOLE CAVITY,DMGD FUSELAGE
Aircraft
- Registration
- N21FW
- Reported as
- Beech 99A
- Category
- Airplane
- Engine
- turbo prop
- Damage
- Substantial damage
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 N21FW · 1
Matched to the same aircraft by N-number and date.