ASN Wikibase Occurrence # 133698
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| Date: | Friday 28 August 1998 |
| Time: | 19:45 LT |
| Type: |  Air Tractor AT-401 |
| Owner/operator: | Carlson Ag Aviation, Inc. |
| Registration: | N4543F |
| MSN: | AT 401-0787 |
| Total airframe hrs: | 2604 hours |
| Engine model: | P&W 1340 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | N. Ottawa Twp., MN -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Agricultural |
| Departure airport: | Northfield, MN (KRLA) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
About 5-minutes after the aerial applicator flight had taken off the pilot said, the airplane's engine experienced a partial power loss. He said the airplane '...did not want to climb and began to settle down.' The pilot ejected his chemical load and was maneuvering for a landing when the right wingtip and landing gear struck the ground. The airplane cartwheeled and rolled over the ground before coming to a stop inverted. The on-scene investigation revealed the airplane s engine had 1 cylinder with no compression. Examination showed the piston rings were badly worn and there was no taper to the cylinder. At the time of the accident the engine was about 70-hours beyond the manufacturer's recommended overhaul time. The airplane had received an annual inspection about 4-months before the accident. The engine logbook showed all compression readings were within the manufacturers recommended range.
Probable Cause: A loss of engine power due to a worn piston ring. A related factor was the owner exceeded the manufacturer's recommended engine overhaul.
Accident investigation:
 |
|
Sources:
NTSB CHI98LA355
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 21-Dec-2016 19:26 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 06-Apr-2024 11:22 | ASN Update Bot | Updated [Time, Other fatalities, Phase, Departure airport, Source, Narrative, Category, Accident report] |
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