Amateur-built RV-4 accident near Florence, New Jersey, December 25, 1999
On December 25, 1999 at about 7:00 pm local time, a amateur-built RV-4, registered N8ZZ, was substantially damaged in an accident near Florence, New Jersey. It was a personal flight under general aviation rules (Part 91). 1 person had minor injuries. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
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.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- December 25, 1999 · about 7:00 pm local time
- Place
- Florence, New Jersey
- Type
- Accident
- Injuries
- 1 person had minor injuries.
- Weather
- visual conditions (good weather)
- Aircraft
- Amateur-built RV-4
- Registration
- N8ZZ · registry record · serial 3407
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
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 noted, and there was no indication of airframe flutter.
The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.
The factual record from the NTSB's investigation tables, in plain English
Pilot
- Certificate: airline transport pilot
- Ratings: multi-engine land; single-engine land; instructor: airplane multi-engine; instructor: airplane single-engine; instructor: instrument airplane; instrument: airplane
- Flight time: 6,077 hours in all; 70 in this make and model; 260 in the last 90 days; 81 in the last 30 days; 5,932 as pilot in command; 4,135 on instruments
- Medical certificate: Class 2 (valid medical--no waivers/lim.)
- Seat: frt
The aircraft
- Airframe total time: 230 hours
- Last inspection: annual inspection, April 1, 1999; 40 hours since
- Maximum gross weight: 1,500 lb
- Seats: 2
- Landing gear: fixed
- Engine: Lycoming O-360 (piston); 0 hours total
The flight
- Departed from: PNE Philadelphia PA at 6:30 pm
- Flight plan: none
- Runway 0
Weather at the time
- Light: daylight
- Wind: from 230° at 4 knots
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 25°F (-4°C), dew point 10°F (-12°C)
- Altimeter: 30.00 inHg
- Observation at 6:53 pm from TTN, 12 miles away
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 1 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), has not been read from the NTSB for this case yet; the list appears here once it has. Open the docket at the NTSB.
Everything on this page comes from the NTSB's public records. The narrative, probable cause and findings are the NTSB's own words; the coded tables behind the report are written out in plain English, with pilots' ages, home towns and medical details left out. The documents and photographs are the NTSB's docket, shown as the NTSB released them. This site's own text never names anyone involved. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.