ASN Wikibase Occurrence # 287571
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| Date: | Wednesday 18 July 2012 |
| Time: | 10:00 LT |
| Type: |  Air Tractor AT-502B |
| Owner/operator: | Delta Dusters LLC |
| Registration: | N205SK |
| MSN: | 502B-0628 |
| Year of manufacture: | 2001 |
| Total airframe hrs: | 6658 hours |
| Engine model: | P&W PT6A SERIES |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Wisner, Louisiana -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Agricultural |
| Departure airport: | Wisner, LA (KPVT) |
| Wisner, LA (KPVT) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that the airplane lifted off of the 2,500-foot long, rough, turf airstrip about 100 feet before the end of the runway. However, the airplane did not climb out of ground effect, and it settled into a bean field. He stated that there were no mechanical issues with the airplane during the accident takeoff. The pilot had reduced the chemical load for the agricultural application flight due to the runway length and ambient temperature, and he had elected to conduct the accident takeoff with the wing flaps extended to about 25 degrees. He reported a gross weight for the accident takeoff of 10,100 lbs. Performance data indicated that a takeoff distance of about 2,600 feet was required to clear a 50-foot obstacle. However, that data was applicable to a hard surface runway at a maximum certificated gross takeoff weight of 8,000 lbs with 10 degrees of flaps. The airplane flight manual did not contain takeoff data for weights or flap settings in excess of 8,000 lbs and 10 degrees, respectively. The airplane manufacturer recommended that takeoffs not be attempted with more than 10 degrees of flap. Regulations and guidance related to agricultural application flights in restricted category airplanes allowed for operations up to 31 percent above the certificated gross takeoff weight. The pilot reported that the maximum gross weight for the airplane was 10,480 lbs, which corresponded to the 31 percent limit. FAA guidance suggested that an increase in takeoff gross weight of 31 percent will increase the required takeoff distance by about 90 percent. The reduced acceleration due to the rough, turf runway and the excess flap deflection selected by the pilot, combined with operating near the maximum permitted takeoff gross weight, resulted in the airplane's inability to attain a positive rate of climb after liftoff.
Probable Cause: The pilot's inadequate takeoff planning that did not consider the reduced acceleration due to a rough, turf runway and his use of an improper flap setting, which resulted in a collision with terrain during takeoff.
Accident investigation:
 |
|
Sources:
NTSB CEN12LA459
History of this aircraft
Other occurrences involving this aircraft
| 20 August 2002 | N628LA | Lane Aviation Inc | 0 | Rosenburg, TX | |
min |
| Mid-air collision | ||||||
| 30 July 2018 | N205SK | Private | 0 | Louise, MS | |
sub |
| Bounced on landing | ||||||
| 10 July 2022 | N205SK | Digger Doug's Crop Dusting Inc | 0 | Wyoming, IL | |
sub |
| Heavy landing | ||||||
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 04-Oct-2022 12:12 | ASN Update Bot | Added |
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