Cessna 172N N733MQ
5 April 1991 · Stockton, California, United States · No injuries
Summary
On 5 April 1991 at about 03:40 local time, a Cessna 172N registered N733MQ, operated by West Valley Flying Club Inc., was involved in an accident near Stockton, California, United States. 2 people were on board and nobody was injured. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.
The record
- Date
- at 03:40
- Classification
- Accident
- Location
- Stockton, California, United States
- Coordinates
- Not recorded
- Aircraft
- Cessna 172N
- Registration
- N733MQ
- Category
- Airplane
- Engines
- 1
- Operator
- West Valley Flying Club Inc.
- Operating rule
- Part 91: General Aviation
- Purpose of flight
- Instructional
- Phase of flight
- Not recorded
- Route
- Palo Alto → Stockton
- Aircraft damage
- Substantial
- Weather
- VMC
- Light
- Night/Dark
- NTSB number
- LAX91LA157
People
Nobody was injured.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 2 | 0 | 0 | 0 | 2 |
Probable cause
THE INSTALLATION BY MAINTENANCE PERSONNEL OF AN INCORRECT GASKET THAT RESULTED IN THE LOSS OF THE ENGINE MAGNETO.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
THE CERTIFICATED COMMERCIAL PILOT/CERTIFIED FLIGHT INSTRUCTOR AND A CERTIFICATED PRIVATE PILOT/INSTRUMENT STUDENT WERE IN A HOLDING PATTERN, IN VFR CONDITIONS, WHILE ON AN INSTRUMENT TRAINING FLIGHT WHEN THE ENGINE QUIT. THE CFI MADE A FORCED LANDING IN AN OPEN FIELD. DURING THE LANDING ROLL, THE AIRPLANE ENCOUNTERED SOFT TERRAIN AND NOSED OVER. EXAMINATION OF THE ENGINE REVEALED THAT THE MAGNETO ASSEMBLY FELL OFF THE ENGINE. AN IMPROPER GASKET WAS INSTALLED UNDER THE MAGNETO HOUSING THAT PREVENTED THE MAGNETO FROM BEING PROPERLY TIGHTENED TO THE REQUIRED TORQUE SETTING. GASKET MATERIAL UNDER THE NUT PROVIDED A CUSHION AFFECT THAT ALLOWED THE NUT TO VIBRATE LOOSE.
Quoted verbatim from the NTSB record.
Other Cessna 172 accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 7 Apr 1991 | Cessna 172P | College Park, Maryland, United States | Civil Air Patrol, Inc. | No injuries | - |
| 25 Apr 1991 | Cessna 172 | Detroit, Michigan, United States | Eximous Flying Club, Inc. | No injuries | - |
| 24 Jul 1991 | Cessna 172N | Napa, California, United States | Bridgeford Flying SVC. | No injuries | - |
| 9 Apr 1991 | Cessna 172H | Morehead, Kentucky, United States | Roger Wend | Minor injuries | - |
| 5 Apr 1991 | Cessna 172A | Hood River, Oregon, United States | Paul J. Welp | No injuries | - |
| 31 Mar 1991 | Cessna 172M | Ogden, Utah, United States | Alta Aircraft | No injuries | - |
All 12,209 records for this type
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 20 Jul 1991 | Cessna C-172P | Hesperia, California, United States | South Bay Aviation | No injuries | - |
| 24 Jul 1991 | Beechcraft 76 | Sacramento, California, United States | Altair Aviation Corp. | No injuries | - |
| 27 Jul 1991 | Ayres S2R | Visalia, California, United States | Gilbert Aviation Industries | Serious injuries | - |
| 1 Aug 1991 | Cessna 421C | Auburn, California, United States | Edward Mueller | No injuries | - |
| 2 Aug 1991 | Champion 7GCBC | Lake Elsinore, California, United States | Halbeisen, John F | Fatal | 2 |
| 2 Aug 1991 | Mooney M20E | Riverside, California, United States | Todd Dreyer | Minor injuries | - |