# Accident 20000229014359A: Amtr XF4, Brooksville, FL, February 29, 2000

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: February 29, 2000, 15:45 local time
- Place: Brooksville, FL
- Airport: Hernando County
- Damage: Substantial damage
- Phase of flight: Fcd/Prec Ldg From Cruise
- Operating rules: General operating rules (Part 91)
- Location: 28.4391° N, 82.5596° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=28.4391&lon=-82.5596&mi=10
- Aircraft: N9VY, a cancelled registration (https://openairdocs.org/deregistered/N9VY-2000-04-18) (OpenAirDocs)
- Registry model: Burak Stanley A XF4 (registry code 056123D, https://openairdocs.org/model/burak-stanley-a-xf4) (OpenAirDocs)
- Reported make and model: AMTR XF4
- Reported engine: LYC O320*
- Fatal injuries: 0
- Pilot flight hours: 8,866 total, 9 in this make and model, 5 in the last 90 days
- NTSB investigation: [NTSB ATL00LA030](https://openairdocs.org/ntsb/ATL00LA030) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20000229014359A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

(.4) APPROXIMATELY 35 MINUTES IN TO THE FLIGHT, THE PILOT EXPERIENCED A LOSS OF PROPELLER THRUST. THE PILOT STATED THAT HE HEARD A LOUD 'BANG' FROM THE ENGINE COMPARTMENT AND EXPERIENCED LOSS OF THRUST. THE PILOT SAID THAT THE ENGINE TACHOMETER WENT TO REDLINE, AND THE PROPELLER RPM DECREASED. THE PILOT SAID , CHANGING THE ENGINE RPM DID NOT CHANGE THE PROPELLER RPM. THE PILOT DECLARED AN EMERGENCY AND STARTED AN EMERGENCY DESCENT FOR A LANDING ON RUNWAY 27. AS THE PILOT MANEUVERED THE AIRPLANE ON THE FINAL APPROACH, HE CLEARED A STAND OF TREES ON THE FINAL APPROACH TO RUNWAY 27. WHILE ON SHORT FINAL TO LAND, THE AIRPLANE INITIALLY COLLIDED WITH THE GROUND SHORT OF THE RUNWAY SURFACE AND SUBSEQUENTLY CAME TO REST ON A TAXIWAY. THE EXAMINATION OF THE WRECKAGE REVEALED THAT THE REX FLEX COUPLING ASSEMBLY HAD FAILED AND THAT THREE OUT OF THE SIX REX BOLTS HAD ALSO FAILED. THE PILOT STATED THAT THE FLEXIDYNE DRIVE SHAFT WAS DESIGNED FOR A 100 HORSE-POWER ENGINE. THE PILOT/BUILDER STATED THAT HE INSTALLED A 150 HORSE POWER ENGINE ON THE AIRPLANE.

## The NTSB's investigation of this event (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB ATL00LA030](https://openairdocs.org/ntsb/ATL00LA030), Feb 29, 2000: Burak Stanley A XF4 (N9VY), Brooksville, FL, substantial damage. Probable cause: The owner/builder's failure to build the airplane within the design stress limits of the drive shaft assembly, that resulted in the failure of the Flex Coupling Retention Bolts.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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