Piper PA-28-140 accident near Henderson, Texas, October 12, 1989
On October 12, 1989 at about 8:00 pm local time, a Piper PA-28-140, registered N6636W, was substantially damaged in an accident near Henderson, Texas. It was an instructional flight under general aviation rules (Part 91). 2 people had minor injuries. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
THE LOSS OF ENGINE POWER AS A RESULT OF A FAILURE OF THE NUMBER 3 EXHAUST VALVE DUE TO UNDETERMINED REASONS. FACTORS INVOLVED IN THE ACCIDENT WERE THE PREVIOUS OWNER'S DELAY IN OVERHAULING THE ENGINE AND HIS FAILURE TO ADHERE TO THE MANUFACTURER'S RECOMMENDED MAINTENANCE INSTRUCTIONS AND ROUGH TERRAIN IN THE TOUCHDOWN AREA OF THE EMERGENCY LANDING.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- October 12, 1989 · about 8:00 pm local time
- Place
- Henderson, Texas · map
- Type
- Accident
- Injuries
- 2 people had minor injuries.
- Weather
- visual conditions (good weather)
- Aircraft
- Piper PA-28-140 · all PA-28-140s on the register
- Registration
- N6636W · no longer on the register · serial 28-20735
- Damage
- Substantial damage
- Flight
- Instructional flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
THE AIRPLANE EXPERIENCED A HARD LANDING AFTER AN ENGINE FAILURE IN CRUISE FLIGHT AND THE ENSUING FORCED LANDING IN ROUGH TERRAIN. THE ENGINE FAILURE WAS DETERMINED TO BE THE RESULT OF THE FAILURE OF THE #3 EXHAUST VALVE. HOWEVER, THE ROOT CAUSE OF THE VALVE FAILURE COULD NOT BE DETERMINED METALLURGICALLY DUE TO SECONDARY DAMAGE TO ALL OF THE FRACTURE SURFACES. THE PILOT HAD RECENTLY PURCHASED THE AIRPLANE AND THE ENGINE WAS 661 HOURS PAST THE RECOMMENDED OVERHAUL TIME. A SERVICE INSTRUCTION CRITICAL TO THE REPLACEMENT OF THE EXISTING VALVES WITH HEAVIER DUTY VALVES HAD NOT BEEN COMPLIED WITH PRIOR TO THE SALE OR THE ACCIDENT. THE PURCHASER WAS NOT AWARE OF THE SERVICE INSTRUCTION.
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: flight instructor, commercial pilot
- Ratings: multi-engine land; single-engine land; instructor: airplane single-engine; instructor: instrument airplane; instrument: airplane
- Flight time: 1,190 hours in all; 15 in this make and model; 100 in the last 90 days; 30 in the last 30 days; 940 as pilot in command; 700 on instruments
- Medical certificate: Class 2 (valid medical--no waivers/lim.)
- Seat: rgt
The aircraft
- Airframe total time: 1,861 hours
- Last inspection: annual inspection, June 20, 1989
- Maximum gross weight: 1,950 lb
- Seats: 4
- Landing gear: fixed
- Engine: Lycoming O-320-E2A (piston); 0 hours total
The flight
- Departed from: JSO Jacksonville TX at 7:30 pm
- Destination: GGG Longview TX
- Flight plan: none
- Runway 0
- A second pilot was aboard
Weather at the time
- Light: daylight
- Wind: from 005° at 5 knots
- Visibility: 15 statute miles
- Sky: clear
- Temperature: 90°F (32°C), dew point 0°F (-18°C)
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| 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.