Piper PA-46-350P accident near Benton Harbor, Michigan, August 4, 2002
On August 4, 2002 at about 5:35 pm local time, a Piper PA-46-350P, registered N316PM, was substantially damaged in an accident near Benton Harbor, Michigan (Southwest Michigan Regional airport). It was a personal flight under general aviation rules (Part 91). 3 people were killed. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
The pilot's failure to maintain airspeed above stall speed resulting in a stall/spin. Additional causes were the pilot not maintaining best glide airspeed and optimal glidepath following the loss of engine power. A factor to the accident was the engine failure due to the fatigue failure of the crankshaft.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- August 4, 2002 · about 5:35 pm local time
- Place
- Benton Harbor, Michigan · Southwest Michigan Regional · map
- Type
- Accident
- Injuries
- 3 people were killed.
- Weather
- visual conditions (good weather)
- Aircraft
- Piper PA-46-350P · all PA-46-350Ps on the register
- Registration
- N316PM · registry record · serial 4636317
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
The single-engine airplane experienced a loss of engine power during cruise flight at flight level 190 (19,000 feet) and impacted the terrain while performing a forced landing to a nearby airport. Visual meteorological conditions prevailed at the time of the accident with clear skies and unrestricted visibilities. The pilot reported the loss of engine power about 16 minutes prior to the accident and requested clearance to the nearest airport. Air traffic control (ATC) issued vectors to the Southwest Michigan Regional Airport (BEH). About 10 minutes prior to the accident, the airplane was positioned approximately 1.3 nm north of BEH at 13,500 feet. The pilot elected to follow ATC vectors verses circling down over BEH. ATC provided vectors for runway 27 at BEH. Witnesses to the accident reported seeing the airplane "spiraling down and crashing into the ground." The wreckage was located on the extended runway 27 centerline, about 1.12 nm from the runway threshold. The distribution of the wreckage was consistent with a stall/spin accident. Approximately four minutes before the accident, the airplane was on a 9.5 nm final approach at 6,700 feet. Between 9.5 and 5.3 nm the airspeed fluctuated between 119 and 155 knots, and the descent rate varied between 1,550 and 2,600 feet/min. Between 5.3 nm and the last radar return at 1.5 nm the airspeed dropped from 155 to 78 knots. According to the Pilot Operating Handbook (POH) the accident airplane should be flown at best glide speed (92 knots) after a loss of engine power. An average engine-out descent rate of 700 feet/min is achieved when best glide speed is maintained during engine-out descents. An engine teardown inspection revealed that the crankshaft was fractured at the number five crankpin journal. Visual examination of the crankshaft (p/n 13F27738, s/n V537920968) showed a fatigue-type fracture through the cheek, aft of the number five crankpin journal. The exact cause of the crankshaft failure could not be determined, due to mechanical damage at the fatigue initiation point. The fracture features for the accident crankshaft was consistent with 14 previous failures of the same part number. The engine manufacturer determined the failures were most likely due to the overheating of the steel during the forging process.
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
Pilot
- Certificate: private
- Ratings: single-engine land; instrument: airplane
- Flight time: 2,408 hours in all; 165 in this make and model; 31 in the last 90 days; 13 in the last 30 days; 2,344 as pilot in command; 0 on instruments
- Last flight review: May 18, 2000
- Medical certificate: Class 3 (valid medical--w/ waivers/lim.)
- Seat: left
- Injury: fatal
The aircraft
- Airframe total time: 187.2 hours
- Last inspection: annual inspection, November 1, 2001; 187.2 hours since
- Maximum gross weight: 4,340 lb
- Seats: 6
- Landing gear: retractable
- Engine: Textron Lycoming TIO-540-AE2A (piston); 0 hours total
The flight
- Departed from: FSD Sioux Falls SD at 3:00 pm
- Destination: BEH Benton Harbor MI
- Flight plan: IFR
- Runway 27, 5,109 ft by 100 ft
Weather at the time
- Light: daylight
- Wind: at 4 knots
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 88°F (31°C), dew point 72°F (22°C)
- Altimeter: 30.12 inHg
- Observation at 5:35 pm from BEH, 1 miles away
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 1 | |||
| Passengers | 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.