Cessna 170B accident near Heber City, Utah, August 26, 1991
On August 26, 1991 at about 11:45 pm local time, a Cessna 170B, registered N4653C, was substantially damaged in an accident near Heber City, Utah (Heber Valley airport). It was a personal flight under general aviation rules (Part 91). No one was hurt; 2 people were on board or involved. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
THE PILOT'S FAILURE TO MAINTAIN DIRECTIONAL CONTROL DURING LANDING GROUND ROLL. A FACTOR RELATING TO THE ACCIDENT WAS THE CROSSWIND WEATHER CONDITIONS.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- August 26, 1991 · about 11:45 pm local time
- Place
- Heber City, Utah · Heber Valley · map
- Type
- Accident
- Injuries
- No one was hurt; 2 people were on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Cessna 170B · all 170Bs on the register
- Registration
- N4653C · no longer on the register · serial 17025597
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
THE ACFT SWERVED OFF THE RWY DURING LANDING ROLL IN X-WIND WX CONDITIONS, GROUND LOOPED, AND IMPACTED THE GROUND.
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: multi-engine land; single-engine land; instrument: airplane; rotorcraft: glider
- Flight time: 1,806 hours in all; 950 in this make and model; 137 in the last 90 days; 36 in the last 30 days
- Medical certificate: Class 1 (valid medical--no waivers/lim.)
- Seat: unk
The aircraft
- Last inspection: inspection type not recorded; 0 hours since
- Maximum gross weight: 2,200 lb
- Seats: 4
- Landing gear: fixed
- Engine: Continental O-300-A (piston); 0 hours total
The flight
- Departed from: BOI Boise ID at 8:30 pm
- Flight plan: none
- Runway 21, 4,400 ft by 75 ft
- A second pilot was aboard
Weather at the time
- Light: daylight
- Wind: from 210° at 13 knots
- Visibility: 30 statute miles
- Sky: broken clouds at 11,000 ft; scat at 7,000 ft
- Temperature: 81°F (27°C), dew point 55°F (13°C)
- Altimeter: 29.00 inHg
- Observation at 11:53 pm from SLC, 31 miles away
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 1 | |||
| Passengers | 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.
Other NTSB records under N4653C the same tail number, which may have belonged to a different aircraft at the time
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.