Air Tractor AT-502 N9185F
5 March 2002 · Schlater, Mississippi, United States · No injuries
Summary
On 5 March 2002 at about 18:30 local time, a Air Tractor AT-502 registered N9185F was involved in an accident near Schlater, Mississippi, United States. One person was 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 18:30
- Classification
- Accident
- Location
- Schlater, Mississippi, United States
- Nearest airport
- Private Airport (NONE)
- Coordinates
- 31.9964, -90.6433
- Aircraft
- Air Tractor AT-502
- Registration
- N9185F
- Category
- Airplane
- Engines
- 1
- Operator
- Not recorded
- Operating rule
- Part 137: Agricultural
- Purpose of flight
- Aerial Application
- Phase of flight
- Not recorded
- Route
- Schlater → Unknown
- Aircraft damage
- Substantial
- Weather
- VMC
- Light
- Day
- NTSB number
- ATL02LA060
People
Nobody was injured.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 1 | 0 | 0 | 0 | 1 |
Probable cause
an unknown person at an unknown time exceeded the engine temperature limitations that resulted in the failure of compressor turbine and the subsequent loss of engine power during takeoff.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
The pilot stated he was on takeoff roll to conduct aerial application flight. Just before rotation he heard a loud pop and observed sparks in the vicinity of the engine compartment. There was insufficient runway remaining to stop the airplane. The airplane went off the end of the runway and collided with a ditch. Examination of the engine assembly revealed a total failure of several compressor turbine blades. Metallurgical examination of the compressor turbine blades revealed voiding and grain separation were observed toward the tip grain boundary along a reaction zone which is indicative of creep propagation. A comparison of the microstructure at the airfoil tip revealed a significant difference in the structure with the tip appearing to be solutioned. According to the original equipment maintenance manual blade tips that are solutioned is an indication of over temperature. if the inter-turbine temperature exceeds 875-degrees Celsius for 2 seconds the engine is required to be returned to an overhaul facility. It could not be determined when or who exceeded the over temperature limit.
Quoted verbatim from the NTSB record.
Other Air Tractor AT-502 accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 20 Nov 2002 | Air Tractor AT-502 | Weiner, Arkansas, United States | - | Serious injuries | - |
| 27 Jul 2002 | Air Tractor AT-502 | San Manuel, Arizona, United States | - | Minor injuries | - |
| 15 Apr 2002 | Air Tractor AT-502 | Lamesa, Texas, United States | - | Minor injuries | - |
| 24 Apr 2003 | Air Tractor AT-502 | Sedan, New Mexico, United States | - | Minor injuries | - |
| 18 Sep 2003 | Air Tractor AT-502 | Fort Pierce, Florida, United States | - | No injuries | - |
| 15 Aug 2003 | Air Tractor AT-502 | Hudson, Illinois, United States | Jeffrey Dungan | No injuries | - |
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 16 Jul 2002 | Saab-Scania Ab (Saab) SF340B | Tupelo, Mississippi, United States | Mesaba Airlines | Serious injuries | - |
| 8 Jan 2002 | Cessna 170B | Bellewood, Mississippi, United States | - | Minor injuries | - |
| 14 Mar 2002 | Beechcraft C24R | Greenville, Mississippi, United States | Earnest Doyle Mosley | No injuries | - |
| 5 Sep 2002 | Beechcraft B-55 | Jackson, Mississippi, United States | West Properties | No injuries | - |
| 16 May 2002 | Taber LANCAIR SUPER ES | Hattiesburg, Mississippi, United States | - | Fatal | 2 |
| 27 Jun 2002 | Piper PA-28-140 | Picayune, Mississippi, United States | - | No injuries | - |