Piper PA-32-260 N7732J
27 April 1990 · Tulsa, Oklahoma, United States · Minor injuries
Summary
On 27 April 1990 at about 14:27 local time, a Piper PA-32-260 registered N7732J, operated by Martinaire, was involved in an accident near Tulsa, Oklahoma, United States. One person was on board and one had minor injuries. The aircraft was destroyed. The NTSB has published a probable cause for this accident; it is quoted in full below.
The record
- Date
- at 14:27
- Classification
- Accident
- Location
- Tulsa, Oklahoma, United States
- Nearest airport
- Tulsa Int. (TWL)
- Coordinates
- 36.1890, -95.9097
- Aircraft
- Piper PA-32-260
- Registration
- N7732J
- Category
- Airplane
- Engines
- 1
- Operator
- Martinaire
- Operating rule
- Part 135: Air Taxi & Commuter
- Purpose of flight
- Unknown
- Phase of flight
- Not recorded
- Route
- Dallas → Unknown
- Aircraft damage
- Destroyed
- Weather
- VMC
- Light
- Day
- NTSB number
- FTW90LA102
People
1 person had minor injuries.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 1 | 0 | 0 | 1 | 0 |
Probable cause
AN ENGINE FAILURE DUE TO A DISCONNECT IN THE MAGNETO DRIVE TRAIN CAUSED BY THE CRANKSHAFT GEAR NOT BEING PROPERLY INSTALLED AND SECURED DURING A RECENT ENGINE OVERHAUL.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
WHILE ON FINAL, THE ENGINE QUIT WITHOUT WARNING AND THE PILOT WAS FORCED TO EXECUTE A FORCED LANDING INTO A HEAVILY WOODED BIRD SANCTUARY. EXAMINATION OF THE ENGINE REVEALED THAT THE CRANKSHAFT GEAR ATTACHMENT BOLT WAS LOOSE WITH 0.196 INCHES OF PLAY AND THE DOWEL PIN WAS SHEARED. GEAR INSTALLATION INSTRUCTIONS CALLED FOR THE GEAR TO BE SEATED WITH A DRIFT AND HAMMER WITH NO MORE THAN 0.001 INCHES OF CLEARANCE. OTHERWISE, THE DOWEL PIN WOULD BE OFFSET AND WORK. BOTH THE BOLT AND THE DOWEL PIN SHOWED EVIDENCE OF WORKING. SHEARING OF THE CRANKSHAFT DOWEL PIN WOULD HAVE RELEASED THE GEAR TO ROTATE ABOUT THE BOLT, THUS DISCONNECTING THE GEAR AND THE IDLER GEARS WHICH TRANSMITTED TORQUE TO THE MAGNETOS. SECONDARY DAMAGE WAS OBSERVED IN THE LEFT MAGNETO. MAINTENANCE RECORDS INDICATED THAT THE ENGINE HAD BEEN OVERHAULED 88.7 HOURS PRIOR TO THE ACCIDENT.
Quoted verbatim from the NTSB record.
Other Piper PA-32 accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 24 Aug 1990 | Piper PA-32 | Kashvik Bay, Alaska, United States | - | No injuries | - |
| 11 Dec 1990 | Piper PA-32 | Kongikank, Alaska, United States | Ervin, Terry | No injuries | - |
| 22 Nov 1990 | Piper PA-32-RT300 | Gaylord, Michigan, United States | - | Fatal | 4 |
| 16 Mar 1990 | Piper PA-32-301 | Almautlak, Alaska, United States | Arctic Circle Air Service | Fatal | 1 |
| 23 May 1990 | Piper PA-32-300 | Little Rock, Arkansas, United States | - | No injuries | - |
| 10 Jun 1990 | Piper PA-32-300 | Havasu Landing, California, United States | Darrel L. Gillman | Fatal | 3 |
All 1,695 records for this type
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 31 Mar 1990 | Piper PA28-140 | Durant, Oklahoma, United States | - | No injuries | - |
| 8 Jun 1990 | Boeing E75 | Watonga, Oklahoma, United States | - | No injuries | - |
| 18 Aug 1990 | Piper PA-28-140 | Kansas, Oklahoma, United States | - | Minor injuries | - |
| 20 Aug 1990 | Cessna 172M | Broken Arrow, Oklahoma, United States | Proflight | Minor injuries | - |
| 1 Sep 1990 | Cessna C172N | Marietta, Oklahoma, United States | - | Minor injuries | - |
| 9 Sep 1990 | Beechcraft E 33 | Tulsa, Oklahoma, United States | Lefler, Roger W. | Fatal | 1 |