Grumman-Schweizer G-164B N297AL
4 July 2002 · Shelley, Idaho, United States · Minor injuries
Summary
On 4 July 2002 at about 02:30 local time, a Grumman-Schweizer G-164B registered N297AL was involved in an accident near Shelley, Idaho, 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 02:30
- Classification
- Accident
- Location
- Shelley, Idaho, United States
- Coordinates
- 43.4500, -112.1667
- Aircraft
- Grumman-Schweizer G-164B
- Registration
- N297AL
- Category
- Airplane
- Engines
- 1
- Operator
- Not recorded
- Operating rule
- Part 137: Agricultural
- Purpose of flight
- Aerial Application
- Phase of flight
- Not recorded
- Route
- Shelley → Unknown
- Aircraft damage
- Destroyed
- Weather
- VMC
- Light
- Day
- NTSB number
- SEA02LA121
People
1 person had minor injuries.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 1 | 0 | 0 | 1 | 0 |
Probable cause
A loss of engine power due to the manufacturer's improperly machined threads, which prevented the cylinder base/head halves from being properly assembled, leading to fatigue propagation and the ultimate separation of the cylinder. A contributing factor was the rough terrain.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
The pilot had just commenced a spray run when there was an abrupt loss of power accompanied by engine roughness and vibration. Unable to maintain flight, the pilot executed a forced landing into the field being sprayed, landing across the rough, furrowed terrain. Post crash examination revealed that the top of the number five cylinder had separated from the lower half of the cylinder. Further metallurgical examination revealed that the cylinder split circumferentially due to fatigue which originated at the first and second thread roots of the cylinder threads on the inside of the cylinder head. Dimensional examination revealed that the threads between the cylinder base and head had been improperly machined resulting in the cylinder's abutting surfaces not coming into complete contact during assembly of the two components.
Quoted verbatim from the NTSB record.
Other Grumman-Schweizer G-164B accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 10 May 2002 | Grumman-Schweizer G-164B | Hordville, Nebraska, United States | AG Flight Inc | No injuries | - |
| 28 Mar 2002 | Grumman-Schweizer G-164B | Ferriday, Louisiana, United States | - | No injuries | - |
| 20 Jul 2002 | Grumman-Schweizer G-164B | Knights Landing, California, United States | - | No injuries | - |
| 6 Sep 2002 | Grumman-Schweizer G-164B | Martin, Michigan, United States | - | No injuries | - |
| 6 Jul 2002 | Grumman-Schweizer G-164B | Sacramento, California, United States | - | No injuries | - |
| 6 Jul 2002 | Grumman-Schweizer G-164B | Weiser, Idaho, United States | - | No injuries | - |
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 11 Aug 2002 | Piper PA-22/20 | Shearer, Idaho, United States | - | No injuries | - |
| 25 Sep 2002 | Piper PA-28-180 | Yellow Pine, Idaho, United States | - | Fatal | 2 |
| 12 Mar 2002 | Piper PA-31 | Atlanta, Idaho, United States | - | Fatal | 3 |
| 16 Jun 2002 | Stinson 108-1 | Heyburn, Idaho, United States | - | No injuries | - |
| 17 Aug 2002 | Beechcraft C-35 | Nampa, Idaho, United States | - | Serious injuries | - |
| 21 Sep 2002 | Cessna R172K | Salmon, Idaho, United States | - | No injuries | - |