# Accident 19991225047409A: Amtr RV4, Florence, NJ, December 25, 1999

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: December 25, 1999, 14:00 local time
- Place: Florence, NJ
- Damage: Substantial damage
- Phase of flight: Normal Cruise
- Operating rules: General operating rules (Part 91)
- Location: 40.1192° N, 74.8088° W: Placed by OpenAirDocs: center of Florence, NJ, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=40.1192&lon=-74.8088&mi=10
- Aircraft: N8ZZ, a cancelled registration (https://openairdocs.org/deregistered/N8ZZ-2013-07-30) (OpenAirDocs)
- Registry model: Zielke Charles S RV-4 (registry code 05625FT, https://openairdocs.org/model/zielke-charles-s-rv-4) (OpenAirDocs)
- Registry engine: Lycoming 0-360-A1D (registry code 41504, https://openairdocs.org/engine/lycoming-0-360-a1d) (OpenAirDocs)
- Reported make and model: AMTR RV4
- Reported engine: LYC O360A1A
- Fatal injuries: 0
- Pilot flight hours: 6,077 total, 70 in this make and model, 260 in the last 90 days
- NTSB investigation: [NTSB NYC00LA061](https://openairdocs.org/ntsb/NYC00LA061) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19991225047409A

## Narrative

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

(.4) ABOUT 30 MINUTES AFTER TAKEOFF, THE PILOT FELT A 'BUZZ,' WHICH LASTED APPROXIMATELY 2 SECONDS. THE AIRPLANE THEN SHOOK VIOLENTLY, SO THE PILOT RETARDED THE THROTTLE TO REDUCE THE SHAKING.  HE THEN TURNED THE MAGNETOS OFF, ONE AT A TIME, AND REAPPLIED POWER, BUT THE SHAKING RETURNED WITH EACH POWER APPLICATION.  CARBURETOR HEAT WAS ALSO APPLIED, WITH NO EFFECT.  THE PILOT THEN TRIED TO ADD ENOUGH POWER TO MAINTAIN ALTITUDE, BUT STILL FOUND THAT ITS APPLICATION RESULTED IN VIOLENT SHAKING.  POWER WAS AGAIN REDUCED TO KEEP THE AIRPLANE CONTROLLABLE.  THE PILOT ATTEMPTED TO GUIDE THE AIRPLANE TO A NEARBY AIRPORT, BUT COULD NOT HOLD ALTITUDE, AND HEADED FOR A PLOWED FIELD.  HE TRIED TO ALIGN THE AIRPLANE WITH THE FURROWS, BUT WAS UNABLE TO DUE TO THE APPROACH ANGLE.  UPON TOUCHDOWN, THE LANDING GEAR COLLAPSED, AND THE WING SPARS WERE DAMAGED.  DURING POST-FLIGHT EXAMINATION, PART OF ONE OF THE WOODEN PROPELLER BLADES WAS FOUND TO BE MISSING.  THERE WAS NO EVIDENCE OF A BIRD STRIKE.  THE PROPELLER HAD BEEN BOLTED ONTO THE HUB WITH THE CORRECT TORQUE'S, AND THE COWLING HAD BEEN FOUND SECURELY FASTENED TO THE AIRFRAME.  THE ENGINE WAS ALSO EXAMINED, WITH NO SIGNIFICANT ANOMALIES NOTE D, AND THERE WAS NO INDICATION OF AIRFRAME FLUTTER. (-23) NO NARRATIVE.

## 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 NYC00LA061](https://openairdocs.org/ntsb/NYC00LA061), Dec 25, 1999: Zielke RV-4 (N8ZZ), Florence, NJ, substantial damage. Probable cause: Failure of one of the propeller blades. A factor was the necessity land across, rather than in alignment with, the furrowed terrain due to the nature of the emergency.

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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