Piper AEROSTAR 602P accident near Kokomo, Indiana, October 5, 2019
On October 5, 2019 at about 8:37 pm local time, a 1981 Piper AEROSTAR 602P, registered N326CW, was destroyed in an accident during maneuvering near Kokomo, Indiana (Kokomo Municipal Airport). It was a business flight under general aviation rules (Part 91). 1 person was killed. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
The pilot's exceedance of the airplane’s critical angle of attack following a dual engine power loss caused by the line service technician fueling the airplane with the wrong fuel, which resulted in an aerodynamic stall and subsequent loss of control. Contributing was the pilot's inadequate supervision of the fuel servicing.
Source: NTSB aviation accident database, copy made November 2, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- October 5, 2019 · about 8:37 pm local time · cases in 2019
- Place
- Kokomo, Indiana · Kokomo Municipal Airport · cases near this airport · map
- Type
- Accident
- Injuries
- 1 person was killed.
- Weather
- visual conditions (good weather)
- Aircraft
- Piper AEROSTAR 602P, built 1981 · all AEROSTAR 602Ps on the register
- Registration
- N326CW · no longer on the register · serial 62P08698165008
- Damage
- Destroyed
- Flight
- Business flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
The airline transport pilot arrived at the departure airport in the reciprocating engine-powered airplane where it was fueled with Jet A jet fuel by an airport employee/line service technician. A witness stated that she saw a "low flying" airplane flying from north to south. The airplane made a "sharp left turn" to the east. The left wing "dipped low" and she then lost sight of the airplane, but when she approached the intersection near the accident site, she saw the airplane on the ground. The airplane impacted a field that had dry, level, and hard features conducive for an off-airport landing, and the airplane was destroyed. The wreckage path length and impact damage to the airplane were consistent with an accelerated stall. Postaccident examination of the airplane found Jet A jet fuel in the airplane fuel system and evidence of detonation in both engines from the use of Jet A and not the required 100 low lead fuel. Use of Jet A rather than 100 low lead fuel in an engine would result in detonation in the cylinders and lead to damage and a catastrophic engine failure. According to the Airplane Flying Handbook, the pilot should witness refueling to ensure that the correct fuel and quantity is dispensed into the airplane and that any caps and cowls are properly secured after refueling.
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
- Fuel contamination during prior to flight
- Fuel contamination during maneuvering
- Loss of control in flight during maneuvering defining event
- Aerodynamic stall/spin during maneuvering
- Collision with terrain or object (not controlled flight into terrain) during uncontrolled descent
The NTSB's findings
- cause Aircraft › Fluids/misc hardware › Fluids › Fuel › Incorrect use/operation other cases naming the fuel system
- cause Aircraft › Aircraft oper/perf/capability › Performance/control parameters › Angle of attack › Capability exceeded
- factor Personnel issues › Action/decision › Action › Lack of action › Pilot
- Personnel issues › Action/decision › Action › Incorrect action performance › Ground crew
- Personnel issues › Task performance › Use of equip/info › Aircraft control › Pilot
Pilot
- Certificate: airline transport pilot, flight instructor, commercial pilot
- Ratings: multi-engine land; single-engine land; single-engine sea; instructor: airplane multi-engine; instructor: airplane single-engine; instructor: instrument airplane
- Flight time: 7,500 hours in all
- Medical certificate: Class 2 (with waivers/limitations)
- Seat: left
- Injury: fatal
The aircraft
- Airframe total time: 3,002.3 hours
- Last inspection: annual inspection, August 22, 2019
- Seats: 6
- Landing gear: retractable
- Engine 1: Lycoming IO-540-AA1A5 (piston); 1,211 hours total
- Engine 2: Lycoming IO-540-AA1A5 (piston); 1,211 hours total
The flight
- Departed from: OKK Kokomo IN
- Flight plan: none
Weather at the time
- Light: daylight
- Wind: from 140° at 9 knots
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 72°F (22°C), dew point 46°F (8°C)
- Altimeter: 30.01 inHg
- Observation at 8:56 pm from OKK, 3 miles away
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flight crew | 1 |
Photographs from the investigation 6 pictures from the NTSB's docket, as the NTSB released them
Photo 1: Main Wreckage
Photo 2: Wreckage Path
Photo 3: Fuel Sample from Aircraft Fuselage Tank
Photo 4: Fuel Sample from Fuel Line to Right Engine Fuel Manifold Valve
Photo 5: Fuel Sample from Fuel Line to Left Engine Fuel Manifold Valve
Photo 6: Fueling Truck used to Refuel the Accident AirplaneThe NTSB's photographs with the NTSB's captions, at screen size. Open a picture to see it full size or to report one that should not be shown.
Documents from the investigation the NTSB's docket: the evidence folder behind the report
15 documents, released by the NTSB on July 22, 2021. 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 | Record of Conversation - Janice Klien | PDF, 1 page · our copy | View Download |
| 2 | Wreckage Diagram | PDF, 1 page · our copy | View Download |
| 3 | Record of Examination | PDF, 1 page · our copy | View Download |
| 4 | Written Statement - John Yootz | PDF, 1 page · our copy | View Download |
| 5 | Record of Interview - John Yoont | PDF, 2 pages · our copy | View Download |
| 6 | Written Statement - Laura Stants | PDF, 1 page · our copy | View Download |
| 7 | Record of Interview - Laura Stants | PDF, 2 pages · our copy | View Download |
| 8 | Wreckage Release | PDF, 1 page · our copy | View Download |
| 9 | Airplane Flying Handbook, Chapter 2 | PDF, 20 pages · our copy | View Download |
| 10 | Ac 20-122A | PDF, 3 pages · our copy | View Download |
| 11 | Ac 20-116 | PDF, 2 pages · our copy | View Download |
| 12 | Gama Specification No. 3 | PDF, 17 pages · our copy | View Download |
| 13 | Aircraft Logs | PDF, 192 pages | View Download |
| 14 | Photo Log | PDF, 6 pages · our copy | View Download |
| 15 | FAA Toxicology Report | PDF, 1 page · our copy | View Download |
Connections how this case links to the rest of the register
- N326CW: not on the register today · the record of its deregistration
- Piper AEROSTAR 602 24 registered today · the model family and its accident history
- Piper 44,838 aircraft on the register
- Engine: Lycoming IO-540-AA1A5 8 aircraft carry this series today · as the NTSB recorded it
- Engine: Lycoming IO-540-AA1A5 8 aircraft carry this series today · as the NTSB recorded it
- Kokomo Municipal · nearest airport
- Accidents and incidents in Indiana 1,367 since 1982 · 179 in the last ten years
- Indiana 5,700 aircraft registered
The whole map of how records connect · these connections as data: /graph/accident/CEN20FA002.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.