Piper PA 22-150 accident near Las Vegas, New Mexico, August 9, 2017
On August 9, 2017 at about 4:25 pm local time, a 1960 Piper PA 22-150, registered N3664Z, was substantially damaged in an accident during enroute (cruise) near Las Vegas, New Mexico (San Miguel Ranch airport). It was a personal flight under general aviation rules (Part 91). 1 person was killed. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
The pilot’s exceedance of the airplane’s critical angle of attack while maneuvering to land, which resulted in an accelerated stall and the pilot’s subsequent loss of control. Contributing to the accident was the gap in the pilot’s flight experience, his limited recent flight experience, and his limited instruction in the accident airplane.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- August 9, 2017 · about 4:25 pm local time
- Place
- Las Vegas, New Mexico · San Miguel Ranch · map
- Type
- Accident
- Injuries
- 1 person was killed.
- Weather
- visual conditions (good weather)
- Aircraft
- Piper PA 22-150 160, built 1960 · all PA 22-150s on the register
- Registration
- N3664Z · no longer on the register · serial 22-7562
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
**This report was modified on March 15, 2022. Please see the public docket for this accident to view the original report.** The private pilot departed on a cross-country flight in day visual meteorological conditions. When he did not arrive at his destination as planned, a search was initiated, and the airplane was subsequently located in wooded, mountainous terrain near a private airport about 73 miles short of the destination. The orientation of the wreckage was consistent with the airplane impacting terrain following an aerodynamic stall. Examination of the airplane and engine did not reveal any anomalies that would have precluded normal operation, and there was evidence of fuel at the accident site. The pilot was not in contact with air traffic control during the flight. Radar information showed the airplane maneuvering near the airport before radar contact was lost; the pilot may have been attempting to divert to the airport when the accident occurred. An autopsy of the pilot revealed severe coronary artery disease with 90% stenosis of the left coronary artery as well as evidence of scarring from a previous heart attack. Each of these conditions placed the pilot at significantly increased risk for the sudden development of symptoms from an acute cardiac event. Although the pilot might have decided to divert because he was impaired or incapacitated by the symptoms of an acute cardiac event, this scenario could not be corroborated by any operational evidence. The airplane’s flight track indicated that the pilot maneuvered the airplane into a “bowl” area that included the runway. Afterward, the pilot flew a right downwind leg and turned too closely onto the base leg to complete the base-to-final turn. As a result, the pilot made a 270° left turn inside the rim of the bowl area to align with the runway. As the pilot made the base-to-final turn, he again turned the airplane too closely to complete the turn, most likely because he allowed the bowl area to define the dimensions of the turn. Because of the unnecessary tightness of the turn and the steep bank angle that was required to prevent overshooting the runway, the airplane’s critical angle of attack was exceeded, resulting in an accelerated stall (which has load factors above 1 G and a stall speed higher than the airplane’s 1-G stall speed) and a subsequent loss of control of the airplane. The pilot’s logbook revealed that he logged almost all his 344 hours of total flight experience during or before 2007, with most of those hours logged between 1983 and 1992. Thus, the gap in the pilot’s flight experience, his limited recent flight experience, and the limited instruction that he received after purchasing the accident airplane did not prepare him for the challenges associated with the planned flight or the diversion.
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
- Aerodynamic stall/spin during enroute (cruise) defining event
- Collision with terrain or object (not controlled flight into terrain) during uncontrolled descent
The NTSB's findings
- cause Personnel issues › Physical › Impairment/incapacitation › Cardiovascular › Pilot
- Aircraft › Aircraft oper/perf/capability › Performance/control parameters › (general) › Not attained/maintained
- Personnel issues › Task performance › Use of equip/info › Aircraft control › Pilot
- Personnel issues › Experience/knowledge › Experience/qualifications › Recent experience › Pilot
- Personnel issues › Experience/knowledge › Training › Training with equipment › Pilot
Pilot
- Certificate: private
- Ratings: single-engine land
- Flight time: 344.8 hours in all; 19.1 in this make and model; 10.1 in the last 90 days; 10.1 in the last 30 days
- Last flight review: May 22, 2017
- Medical certificate: BasicMed
- Seat: left
- Injury: fatal
The aircraft
- Airframe total time: 2,495.7 hours
- Last inspection: annual inspection, June 3, 2017
- Maximum gross weight: 2,000 lb
- Seats: 4
- Landing gear: fixed
- Engine: Lycoming O-320-A2B (piston); 2,496 hours total
The flight
- Departed from: DHT Dalhart TX at 11:40 am
- Destination: SAF Santa Fe NM
- Flight plan: none
- Runway 04, 5,600 ft by 100 ft
Weather at the time
- Light: daylight
- Wind: from 210° at 9 knots
- Visibility: 10 statute miles
- Sky: scat at 1,100 ft
- Temperature: 66°F (19°C), dew point 59°F (15°C)
- Altimeter: 30.31 inHg
- Observation at 4:05 pm from KLVS, 29 miles away
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flight crew | 1 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
9 documents, released by the NTSB on April 25, 2019. 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 | Medical Factual Report | PDF, 3 pages | View Download |
| 2 | Pilot Toxiocology | PDF, 1 page | View Download |
| 3 | radar Information | PDF, 2 pages | View Download |
| 4 | Photos | PDF, 5 pages | View Download |
| 5 | Record of Conversation Engine Exam | PDF, 1 page | View Download |
| 6 | Pilot Log Books | PDF, 18 pages | View Download |
| 7 | Petition for Reconsideration | PDF, 4 pages | View Download |
| 8 | Response to Petition for Reconsideration | PDF, 8 pages | View Download |
| 9 | Attachment to Response to Petition for Reconsideration | PDF, 8 pages | 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.
