DEN07CA046 · Piper PA-34-200T
Piper PA-34-200T · Accident: airframe, component or system failure en route
From Greeley–Weld County Airport (GXY) to Southwest Wyoming Regional Airport (RKS)
Event
- NTSB case
- DEN07CA046
- 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-34-200T
- Aircraft type
- Piper PA-34
- 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
- N821GS
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Greeley–Weld County Airport (GXY), Greeley, COTo Southwest Wyoming Regional Airport (RKS), Rock Springs, 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
- Airframe, component or system failure
- 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
- Pilot in command › Wheels up landing, intentional
- Reason for occurrence undetermined
Approximate · Coordinates from the NTSB case API, which marks them as estimated or does not say; no uncertainty radius is established.
NTSB narrative
The airplane was in cruise flight at 12,500 feet. The pilot told his wife that he was disengaging the autopilot to maneuver over the mountains. He then pressed the trim-disengage button on the control yoke. Shortly after, the airplane began rolling uncontrollably to the left and right. The pilot steadied the airplane with the rudder. He then began a 1/2 standard rate left turn. When he went to roll the airplane right, he said that the flight controls were difficult to manipulate. He attempted additional turns and found the problem continued. The pilot changed airspeed and found the problem increased with reduced airspeed. After that, he declared an emergency with air traffic control, began a descent, and proceeded to the nearest airport. The pilot said he was unable to locate the airport so he elected to perform a wheels up landing on a snow-covered field. During the landing, the airplane sustained substantial damage to the inboard left wing and the bottom left side of the forward fuselage. An examination of the airplane revealed no anomalies that could explain the stiff controls.
Probable cause
The pilot experiencing lateral flight control stiffness for undetermined reasons and the pilot's intentional wheels up landing. Factors were the snow covered and rough/uneven terrain.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record DEN07CA046
- Event ID
- 20070207X00152
- Case number
- DEN07CA046
- 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: 7c305ce06d348c7c44d75657128783f67c8894fdaafc5ab4c31b23ee1efed168; retrieved 2026-09-22T04:06:09.358Z.