Piper PA-31T accident near Cheyenne, Wyoming, November 8, 2011
On November 8, 2011 at about 6:00 pm local time, a Piper PA-31T, registered N39EH, was substantially damaged in an accident during initial climb near Cheyenne, Wyoming (Cheyenne Regional Airport). It was flown under charter and air-taxi rules (Part 135). No one was hurt; 4 people were on board or involved. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
The flight crew’s failure to properly latch the cabin door before takeoff.
Source: NTSB aviation accident database, copy made November 2, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- November 8, 2011 · about 6:00 pm local time · cases in 2011
- Place
- Cheyenne, Wyoming · Cheyenne Regional Airport · cases near this airport · map
- Type
- Accident
- Injuries
- No one was hurt; 4 people were on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Piper PA-31T · all PA-31Ts on the register
- Registration
- N39EH · registry record · serial 31T-7920020
- Damage
- Substantial damage
- Flight
- Flight · charter and air-taxi rules (Part 135)
The NTSB's narrative final · quoted from the NTSB record
The airplane was climbing through 7,500 feet when the main cabin door opened in-flight and subsequently separated from the airframe. The main cabin door was later recovered and examined. The examination revealed deformation on the outer skin on the lower end of the door; the skin deformation was consistent with the door rotating downward and aft relative to the hinge attachment. The fracture surfaces were on slant planes consistent with ductile overstress fracture. No evidence of preexisting cracks was observed. The door latching mechanism was examined and all pushrods, latch pins, and the associated bellcrank were in place and intact. Wear was observed on the upper side of the forward pins at the middle and upper positions; however, the latching mechanism travel and extension of the latch pins was correct. No other anomalies were noted; thus it is likely the door latch mechanism was not fully engaged before takeoff, which resulted in the door opening in-flight.
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
- Part(s) separation from AC during initial climb defining event
The NTSB's findings
- cause Aircraft › Aircraft structures › Doors › Passenger/crew doors › Incorrect use/operation other cases naming the airframe structure
- cause Personnel issues › Task performance › Use of equip/info › Use of equip/system › Flight crew
Pilot
- Certificate: airline transport pilot
- Ratings: multi-engine land; instrument: airplane
- Flight time: 4,985 hours in all; 3,219 in this make and model; 230 in the last 90 days; 48 in the last 30 days; 3,450 as pilot in command
- Last flight review: May 2, 2011
- Medical certificate: Class 2 (without waivers/limitations)
- Seat: left
- Injury: no injuries
The aircraft
- Airframe total time: 6,345 hours
- Last inspection: inspection type not recorded, July 7, 2011
- Maximum gross weight: 9,000 lb
- Seats: 7
- Landing gear: retractable
- Engine 1: P&W Canada PT6A-60A (turboprop); 0 hours total
- Engine 2: P&W Canada PT6A-60A (turboprop); 0 hours total
- Operator: Travelaire Service INC
The flight
- Departed from: CYS Cheyenne WY at 5:40 pm
- Destination: SHR Sheridan WY
- Flight plan: IFR
Weather at the time
- Light: daylight
- Wind: from 330° at 11 knots
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 36°F (2°C), dew point 16°F (-9°C)
- Altimeter: 30.10 inHg
- Observation at 5:53 pm from CYS, 20 miles away
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flight crew | 3 | |||
| Passengers | 1 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
4 documents, released by the NTSB on June 21, 2013. 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 | Pilot/operator Aircraft Accident Report, NTSB Form 6120.1 | PDF, 9 pages | View Download |
| 2 | Crew Statements | PDF, 2 pages | View Download |
| 3 | Materials Laboratory 15 - Factual Report 13-017 (16 Embedded Images) | PDF, 13 pages | View Download |
| 4 | Evidence Control Form | PDF, 3 pages | View Download |
The same docket at the NTSB · documents without a copy here are fetched from the NTSB when you open them.
Connections how this case links to the rest of the register
- N39EH on the register today · the tail number may have moved to another aircraft since
- Piper PA-31 Navajo and Chieftain 934 registered today · the model family and its accident history
- Piper 44,840 aircraft on the register
- Engine: P&W Canada PT6A-60A 1,176 aircraft carry this series today · as the NTSB recorded it
- Engine: P&W Canada PT6A-60A 1,176 aircraft carry this series today · as the NTSB recorded it
- Cheyenne Rgnl/Jerry Olson Field · nearest airport
- Sheridan County · bound for
- Accidents and incidents in Wyoming 778 since 1982 · 108 in the last ten years
- Wyoming 3,236 aircraft registered
The whole map of how records connect · these connections as data: /graph/accident/WPR12LA030.json.
The bigger picture in Aviation Analytics: accidents over time since 1982, by model, by phase of flight and conditions, by place and on the map.
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 does not name anyone involved, its policy at this time. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.