Piper PA-38-112 accident near Silver Bow, Montana, August 15, 2011
On August 15, 2011 at about 5:30 pm local time, a Piper PA-38-112, registered N2584N, was substantially damaged in an accident during maneuvering near Silver Bow, Montana. It was an instructional flight under general aviation rules (Part 91). 2 people were killed. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
The pilot's failure to maintain airplane control while maneuvering.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- August 15, 2011 · about 5:30 pm local time
- Place
- Silver Bow, Montana · map
- Type
- Accident
- Injuries
- 2 people were killed.
- Weather
- visual conditions (good weather)
- Aircraft
- Piper PA-38-112 · all PA-38-112s on the register
- Registration
- N2584N · no longer on the register · serial 38-79A0931
- Damage
- Substantial damage
- Flight
- Instructional flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
The operator stated that the flight instructor indicated that the purpose of the instructional flight was to have the student conduct a series of touch-and-go landings before proceeding to the training area where he intended on having the student practice steep turns, turns around a point, and holding a level altitude. A witness located near the accident site reported seeing the airplane flying in a clockwise horizontal circle with the wings almost vertical, while slowly losing altitude. The airplane appeared to be attempting to straighten out and climb when it then went straight down in a nosedive. A second witness observed the airplane spinning to the right before descending. The witness reported that before losing sight of the airplane, it appeared to be pulling up. Wreckage and impact signatures were consistent with a right wing low and nose low impact. Postaccident examination of the airframe, flight control system, and engine revealed no evidence of mechanical malfunctions or failures that would have precluded normal operation. From the witness observations, it is likely that the airplane entered a spin and the pilot was not able to regain control. It could not be determined who was at the flight controls at the time of the accident.
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 in flight during maneuvering defining event
- Collision with terrain or object (not controlled flight into terrain) during uncontrolled descent
The NTSB's findings
- cause Personnel issues › Task performance › Use of equip/info › Aircraft control › Pilot
Flight instructor
- Certificate: airline transport pilot, flight instructor, commercial pilot
- Ratings: multi-engine land; single-engine land; instructor: airplane multi-engine; instructor: airplane single-engine; instructor: instrument airplane; instrument: airplane
- Flight time: 10,440 hours in all; 34 in the last 30 days
- Last flight review: May 6, 2011
- Medical certificate: Class 2 (with waivers/limitations)
- Seat: rgt
- Injury: fatal
Dual student
- Certificate: student
- Flight time: 19 hours in all
- Medical certificate: Class 3
- Seat: left
- Injury: fatal
The aircraft
- Airframe total time: 1,874 hours
- Last inspection: annual inspection, April 29, 2011
- Maximum gross weight: 1,670 lb
- Seats: 2
- Landing gear: fixed
- Engine: Lycoming O-235 SERIES (piston); 0 hours total
- Operator: Jj Aviation
The flight
- Departed from: BTM Butte MT at 4:30 pm
- Destination: BTM Butte MT
- Flight plan: none
- A second pilot was aboard
Weather at the time
- Light: daylight
- Wind: at 3 knots
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 79°F (26°C), dew point 45°F (7°C)
- Altimeter: 29.89 inHg
- Observation at 5:53 pm from DLN, 44 miles away
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flight crew | 2 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), has not been read from the NTSB for this case yet; the list appears here once it has. Open the docket at the NTSB.
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.