Grumman-Schweizer G-164B N6725K
8 June 1990 · Buttonwillow, California, United States · Serious injuries
Summary
On 8 June 1990 at about 13:30 local time, a Grumman-Schweizer G-164B registered N6725K, operated by Vince Crop Duster, Inc., was involved in an accident near Buttonwillow, California, United States. 2 people were 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 13:30
- Classification
- Accident
- Location
- Buttonwillow, California, United States
- Coordinates
- 35.4298, -119.4901
- Aircraft
- Grumman-Schweizer G-164B
- Registration
- N6725K
- Category
- Airplane
- Engines
- 1
- Operator
- Vince Crop Duster, Inc.
- Operating rule
- Part 137: Agricultural
- Purpose of flight
- Aerial Application
- Phase of flight
- Not recorded
- Aircraft damage
- Destroyed
- Weather
- VMC
- Light
- Day
- NTSB number
- LAX90DVA04
People
1 person was seriously injured.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 2 | 0 | 1 | 0 | 0 |
Probable cause
FAILURE OF THE #7 CYLINDER DUE TO A PRE-EXISTING CRACK. THE TERRAIN CONDITION WAS A RELATED FACTOR.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
THE PILOT WAS COMPLETEING AN AERIAL APPLICATION SWATH RUN, WHEN HE HEARD A LOUD BACKFIRE EMANATE FROM THE ENGINE DURING THE PULL-UP. THE ENGINE THEN QUIT RUNNING ALTOGETHER. THE PILOT ATTEMPTED TO MAKE A LANDING ON A DIRT ROAD, BUT LANDED SHORT IN A TOMATO FIELD, AND THE AIRCRAFT NOSED OVER ONTO ITS BACK. EXAMINATION OF THE ENGINE REVEALED THAT THE NUMBER 7 CYLINDER HEAD HAD A CRACK, WHICH EXTENDED FROM THE FORWARD SPARK PLUG BOSS AROUND THE CYLINDER HEAD TO THE REAR SPARK PLUG BOSS. DETAILED EXAMINATION OF THE CRACK SHOWED THAT THE FRACTURE FACE WAS CONTAMINATED BY CARBON DEPOSITS AND LIGHT CORROSION IN THE COARSE AREA OF THE CRACK, INDICATING THAT THE CRACK WAS PRESENT FOR A LENGTHY PERIOD OF TIME PRIOR TO THE ACCIDENT. THE CYLINDER WAS REPORTED TO HAVE ONLY 181 HOURS SINCE OVERHAUL.
Quoted verbatim from the NTSB record.
Other Grumman-Schweizer G-164B accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 19 Aug 1990 | Grumman-Schweizer G-164B | Westley, California, United States | - | Serious injuries | - |
| 8 Jul 1989 | Grumman-Schweizer G-164B | Holden, Utah, United States | Spanish Fork Flying Service | No injuries | - |
| 18 Jul 1989 | Grumman-Schweizer G-164B | Anahuac, Texas, United States | Brown, Ronnie J. | Minor injuries | - |
| 6 Jun 1989 | Grumman-Schweizer G-164B | Ville Platte, Louisiana, United States | Young Flyers | No injuries | - |
| 11 Aug 1992 | Grumman-Schweizer G-164B | Atkinson, Nebraska, United States | Mitchell, Larry D. | No injuries | - |
| 5 Jun 1993 | Grumman-Schweizer G-164B | Kaplan, Louisiana, United States | - | No injuries | - |
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 | - |