Cessna 210E accident near Jacksonville, Florida, March 25, 1986
On March 25, 1986 at about 9:45 pm local time, a Cessna 210E, registered N4916U, was substantially damaged in an accident near Jacksonville, Florida (Herlong airport). It was a personal flight under general aviation rules (Part 91). No one was hurt; 1 person was on board or involved. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
The NTSB has not yet published a probable cause for this accident. Investigations usually take one to two years; this page updates when the final report is released.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- March 25, 1986 · about 9:45 pm local time
- Place
- Jacksonville, Florida · Herlong · map
- Type
- Accident
- Injuries
- No one was hurt; 1 person was on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Cessna 210E · all 210Es on the register
- Registration
- N4916U · no longer on the register · serial 21058616
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
AFTER DEPARTURE PLT SELECTED LANDING GEAR UP AND DID NOT RECEIVE A GEAR UP INDICATION. ANOTHER AIRCRAFT FLEW UNDER THE AIRCRAFT AND REPORTED THE NOSE GEAR AND LEFT MAIN GEAR WERE UP AND THAT THE RIGHT MAIN GEAR WAS PARTIALLY EXTENDED. WHEN ATTEMPTS TO CORRECT THIS SITUATION WERE UNSUCCESSFUL THE AIRCRAFT WAS LANDED IN THIS CONFIGUARTION. POST CRASH INSPECTION OF THE AIRCRAFT REVEALED A SECONDARY RELIEF VALVE IN THE HYDRAULIC POWER PACK WAS BEING HELD OPEN BY CONTAMINATION ALLOWING HYDRAULIC PRESSURE TO BY PASS THE LANDING GEAR ACTUATORS. THE LOGBOOK RECORDS FOR THE AIRCRAFT REVEALED NO EVIDENCE THE HYDRAULIC POWER PACK HAD EVER BEEN OVERHAULED OR THAT A MODIFICATION TO REMOVE THE SECONDARY RELIEF VALVE HAD BEEN COMPLIED WITH.
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: commercial pilot
- Ratings: single-engine land; instrument: airplane
- Flight time: 6,622 hours in all; 82 in this make and model; 19 in the last 90 days; 6,520 as pilot in command
- Medical certificate: Class 2 (valid medical--w/ waivers/lim.)
- Seat: left
The aircraft
- Airframe total time: 1,726 hours
- Last inspection: annual inspection, April 6, 1985; 85 hours since
- Maximum gross weight: 3,100 lb
- Seats: 6
- Landing gear: retractable
- Engine: Continental IO 520-A (piston); 0 hours total
The flight
- Departed from: CRG Jacksonville FL at 8:00 pm
- Flight plan: none
- Runway 11, 4,000 ft by 100 ft
Weather at the time
- Light: daylight
- Wind: from 050° at 10 knots
- Visibility: 7 statute miles
- Sky: broken clouds at 8,000 ft; scat at 4,000 ft
- Temperature: 68°F (20°C), dew point 59°F (15°C)
- Altimeter: 30.00 inHg
- Observation at 9:50 pm from CRG, 15 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.