Piper PA 22-150 accident near Mammoth Lakes, California, July 1, 2017
On July 1, 2017 at about 7:30 pm local time, a Piper PA 22-150, registered N1737P, was substantially damaged in an accident during landing near Mammoth Lakes, California (Mammoth Yosemite 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 failure to maintain directional control during the landing roll.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- July 1, 2017 · about 7:30 pm local time
- Place
- Mammoth Lakes, California · Mammoth Yosemite · map
- Type
- Accident
- Injuries
- No one was hurt; 3 people were on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Piper PA 22-150 · all PA 22-150s on the register
- Registration
- N1737P · no longer on the register · serial 22-2527
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
During the landing roll, the tailwheel-equipped airplane veered off the runway to the left, the right main landing gear collapsed, and the right wing impacted the ground. The airplane sustained substantial damage to the fuselage. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. The pilot did not submit the National Transportation Safety Board Pilot/Operator Aircraft Accident/Incident Report Form 6120.1.
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
What happened, in order
- Loss of control on ground during landing defining event
- Runway excursion during landing
- Landing gear collapse during landing
The NTSB's findings
- cause Aircraft › Aircraft oper/perf/capability › Performance/control parameters › Directional control › Not attained/maintained
- cause Personnel issues › Task performance › Use of equip/info › Aircraft control › Pilot
Pilot
- Certificate: private
- Ratings: single-engine land
- Medical certificate: Class 2 (with waivers/limitations)
- Seat: unk
- Injury: no injuries
The aircraft
- Last inspection: inspection type not recorded
- Maximum gross weight: 2,000 lb
- Seats: 2
- Landing gear: fixed
- Engine: Lycoming O-320 SERIES (piston); 0 hours total
The flight
- Destination: MMH Mammoth Lakes CA
- Flight plan: not recorded
- Runway 09, 7,000 ft by 100 ft
Weather at the time
- Light: daylight
- Wind: from 110° at 9 knots
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 82°F (28°C), dew point 27°F (-3°C)
- Altimeter: 30.14 inHg
- Observation at 7:15 pm from KMMH, 1 miles away
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flight crew | 1 | |||
| Passengers | 2 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
2 documents, released by the NTSB on February 27, 2018. View them here, or download them; the NTSB redacts some personal details before release, and this site shows the NTSB's own titles rather than its file names.
| # | Document | What it is | |
|---|---|---|---|
| 1 | Record of Email (Pilot) | PDF, 1 page | View Download |
| 2 | Accident Photo (Courtesy of FAA) | PDF, 1 page | View Download |
The same docket at the NTSB · documents without a copy here are fetched from the NTSB when you open them.
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.