Piper PA-32-300 accident near Mammoth Lakes, California, February 5, 1990
On February 5, 1990, a Piper PA-32-300, registered N8620N, was substantially damaged in an accident near Mammoth Lakes, California (Mammoth Lakes airport). It was a personal flight under general aviation rules (Part 91). No one was hurt; 3 people were on board or involved. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
THE PILOT'S INADEQUATE REMOVAL OF ICE FROM THE FUSELAGE, WINGS, AND HORIZONTAL STABILIZER PRIOR TO TAKEOFF.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- February 5, 1990
- Place
- Mammoth Lakes, California · Mammoth Lakes · map
- Type
- Accident
- Injuries
- No one was hurt; 3 people were on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Piper PA-32-300 · all PA-32-300s on the register
- Registration
- N8620N · no longer on the register · serial 32-7140012
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
THE PILOT REPORTED ENCOUNTERING PROP RPM PROBLEMS WHICH DETERIORATED THE AIRPLANE'S CLIMB PERFORMANCE AND HE ELECTED TO LAND IN A ROUGH/UNEVEN FIELD. GROUND WITNESSES REPORTED THAT THE AIRPLANE STAGGERED INTO THE AIR IN GROUND EFFECT AND THEN CRASHED. THE WITNESSES ALSO STATED THAT UPON THEIR ARRIVAL AT THE ACCIDENT SITE, THE AIRPLANE'S WINGS, FUSELAGE, AND EMPENNAGE WERE COVERED WITH ICE THAT APPEARED TO HAVE MELTED AND REFROZEN. THE PLT REPORTED THAT HE HAD REMOVED ICE BEFORE DEPARTING.
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: private
- Ratings: multi-engine land; single-engine land
- Medical certificate: Class 3 (valid medical--no waivers/lim.)
- Seat: unk
The aircraft
- Last inspection: inspection type not recorded; 0 hours since
- Maximum gross weight: 3,400 lb
- Seats: 6
- Landing gear: fixed
- Engine: Lycoming IO-540-K1A5 (piston); 0 hours total
The flight
- Destination: FUL Fullerton CA
- Flight plan: VFR
- Runway 27, 7,000 ft by 100 ft
Weather at the time
- Light: daylight
- Wind: from 250° at 13 knots
- Visibility: 10 statute miles
- Sky: scat at 2,000 ft
- Temperature: 0°F (-18°C), dew point 0°F (-18°C)
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 1 | |||
| Passengers | 2 |
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.