DEN03LA139 · Piper PA-28-161
Piper PA-28-161 · Accident: in flight encounter with weather en route
From Central Wyoming Regional Airport (RIW) to Jackson Hole Airport (JAC)
Event
- NTSB case
- DEN03LA139
- Event typeAccident: someone killed or seriously injured, or the aircraft substantially damaged (NTSB definition). Incident: an occurrence that affected or could have affected safety, short of that. Glossary
- Accident
- InvestigationHow far the investigation had got when the record was published: preliminary, ongoing, final or completed. Unknown where the source does not say. Glossary
- Completed
- API-reported fatalities
- 0 · all aircraft and ground
- Ground fatalities
- Unknown
- OperationWhat kind of flying it was, grouped by the rules it flew under: airline (US Part 121), air taxi and commuter (Part 135), general aviation (Part 91 and similar), military or government. Glossary
- General aviation
- WeatherVisual meteorological conditions (VMC): good enough to fly by looking outside. Instrument conditions (IMC): cloud or low visibility, flying by instruments. Glossary
- Visual Meteorological Cond
Piper PA-28-161
- Aircraft type
- Piper PA-28
- Category
- Airplane
- RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
- N2973T
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Central Wyoming Regional Airport (RIW), Riverton, WYTo Jackson Hole Airport (JAC), Jackson Hole, WY
- Aircraft age
- Not recorded
- Flight rulesThe regulations the flight operated under: in the US, Part 91 (general aviation), Part 121 (airlines), Part 135 (air taxi and commuter) and others; for flights abroad, the NTSB's coarser commercial or non-commercial code. Glossary
- Part 91: General Aviation
- Phase of flightThe stage of the flight when things started to go wrong: standing, taxi, takeoff, initial climb, en route, maneuvering, approach or landing. Glossary
- En route · cruise
- First occurrenceThe single coded event the NTSB judges best describes what happened (records from 2008 on). Older records name the first occurrence in the sequence instead. Glossary
- In flight encounter with weather
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Substantial
Cause areas
No findings designated as a cause are recorded in the NTSB data yet.
Approximate · Coordinates from the NTSB case API, which marks them as estimated or does not say; no uncertainty radius is established.
NTSB narrative
The pilot, with his three passengers, was climbing through 9,500 feet to fly over a mountain. He said that he encountered a severe downdraft and was unable to clear the mountain peak. He made a forced landing straight ahead, "for fear of a stall or spin into the trees." The airplane slid approximately 100 feet, separating the fixed landing gear and crushing inward the fuselage bottom. The density altitude at the accident location, an altitude of 8,795 feet, was calculated to be 11,955 feet. The density altitude at 9,500 feet was calculated to be 12,825 feet. The airplane manufacturer's representative said that "published engine performance charts indicate that the airplane had exceeded its certificated limitations." A postaccident engine test run was performed, and no anomalies were identified.
Probable cause
The pilot's inadequate preflight planning (attempting to exceed aircraft's published certificated performance), the pilot not obtaining sufficient altitude to clear the terrain (not possible), and the pilot's inadequate in flight planning/decision making. Contributing factors were the high-density weather conditions, the downdraft weather conditions, and the mountainous terrain condition.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record DEN03LA139
- Event ID
- 20030811X01299
- Case number
- DEN03LA139
- Dataset
- historical-pre2008
- Source SHA-256
- 89e2df6d848e7ab3b42e7d7c7a03ff403303057a26ca04c95b3ea67201c3ce74
Source notes (4)
- Unreviewed is an editorial label, not an investigation status. API-sourced is not report-checked or human-reviewed. Explicit event totals are used without summing aircraft injury tables; onboard allocation is withheld. Unknown values remain unknown. The operation category is mapped from the NTSB-reported FAR part and has not been reviewed.
- Filled from the NTSB case API where the bulk record had no value: investigation status, coordinates. Values present in the bulk record are kept.
- The date is the local date, which is the same as the UTC date the NTSB stores.
- API snapshot SHA-256: b5621fc26f08fd95c43f2860d6fd68c3c325658ed4cb5847fcbcf11ab88295d1; retrieved 2026-09-22T08:49:36.043Z.