Cessna 210M N9139M
20 November 1990 · Fallbrook, California, United States · Serious injuries
Summary
On 20 November 1990 at about 20:00 local time, a Cessna 210M registered N9139M, operated by Self Enterprises, was involved in an accident near Fallbrook, California, United States. One person was on board and one was seriously injured. The aircraft was destroyed. The NTSB has published a probable cause for this accident; it is quoted in full below.
The record
- Date
- at 20:00
- Classification
- Accident
- Location
- Fallbrook, California, United States
- Coordinates
- 33.3892, -117.2105
- Aircraft
- Cessna 210M
- Registration
- N9139M
- Category
- Airplane
- Engines
- 1
- Operator
- Self Enterprises
- Operating rule
- Part 91: General Aviation
- Purpose of flight
- Business
- Phase of flight
- Not recorded
- Route
- Unknown → Unknown
- Aircraft damage
- Destroyed
- Weather
- VMC
- Light
- Day
- NTSB number
- LAX91LA035
People
1 person was seriously injured.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 1 | 0 | 1 | 0 | 0 |
Probable cause
THE FAILURE OF THE NUMBER 5 CYLINDER PISTON CONNECTING ROD DUE TO BENDING AND SUBSEQUENT FATIGUE FRACTURE. CONTRIBUTING TO THE ACCIDENT WAS THE IMPROPER STARTING PROCEDURE ACCOMPLISHED BY AN UNIDENTIFIED PERSON WHICH RESULTED IN EXCESSIVE FUEL IN THE CYLINDER RESULTING IN A HYDRAULIC LOCK WITHIN THE NUMBER 5 CYLINDER.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
A CESSNA 210M LOST ENG POWER AND COLLIDED WITH A POLE AFTER A FORCED LANDING ON A CITY STREET. THE ENGINE CRANKCASE WAS FRACTURED AND THE #5 PISTON CONNECTING ROD HAD SEPARATED FROM THE ENG AND WAS FOUND ALONG THE WRECKAGE PATH. EXAM OF THE NUMBER 5 CYLINDER WALL DISCLOSED EVIDENCE OF THE AREA BELOW THE NORMAL PISTON STROKE BEING SCRAPED BY THE PISTON RINGS. ACCORDING TO THE METALLURGIC REPORT, THE PISTON'S CONNECTING ROD FAILED DUE TO A FATIGUE CRACK. THE CONNECTING ROD WAS BENT SOME TIME AFTER INITIAL ENG OPERATION. THE BENDING THAT OCCURRED TO THE NO. 5 CONNECTING ROD IS CHARACTERISTIC OF AN HYD LOCK CONDITION WHERE THE PISTON IS FORCED AGAINST INCOMPRESSIBLE FLUIDS BETWEEN THE PISTON AND CYLINDER HEAD. NO INDICATION OF METALLURGICAL DEFECT WAS OBSERVED IN THE CONNECTING ROD. HARDNESS READINGS ON THE CONNECTING ROD, WHICH INDICATES THE STRENGTH, CONFORMED TO MATERIAL SPECIFICATIONS. THE MAINTENANCE RECORDS NOTE THAT A MAJOR OVERHAUL WAS ACCOMPLISHED 207.8 HOURS BEFORE THE ACCIDENT.
Quoted verbatim from the NTSB record.
Other Cessna 210 accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 30 Sep 1990 | Cessna 210 | White Plains, Georgia, United States | Grecol Aviation, Inc. | No injuries | - |
| 26 Feb 1990 | Cessna 210-M | Sarasota, Florida, United States | Flight Express | Serious injuries | - |
| 25 Jun 1990 | Cessna 210L | Fort Lauderdale, Florida, United States | - | No injuries | - |
| 12 Jan 1990 | Cessna 210M | Ocala, Florida, United States | Cherokee Express | No injuries | - |
| 22 Nov 1990 | Cessna 210G | Indianapolis, Indiana, United States | Larry E. Bailey | Minor injuries | - |
| 16 Apr 1990 | Cessna 210 | Eden Prairie, Minnesota, United States | Olsen, Loren T | Minor injuries | - |
All 2,022 records for this type
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 15 Apr 1990 | Cessna 180 | Soledad, California, United States | - | No injuries | - |
| 10 Oct 1990 | Cessna 150 | Riverside, California, United States | PAR Flight | No injuries | - |
| 17 Apr 1990 | Piper PA46 | Paso Robles, California, United States | Piper Aircraft Corp. | No injuries | - |
| 7 Oct 1990 | Cessna 182M | Bakersfield, California, United States | - | No injuries | - |
| 1 Apr 1990 | Piper J-3 | Creston, California, United States | - | Minor injuries | - |
| 11 Oct 1990 | Bell 47G4 | Merced, California, United States | John W. Myers | Serious injuries | - |