ASN Wikibase Occurrence # 82714
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| Date: | Wednesday 17 November 2010 |
| Time: | 20:53 |
| Type: |  Cessna M337B Super Skymaster |
| Owner/operator: | Patriot Technologies Group LLC |
| Registration: | N1309 |
| MSN: | 0015 |
| Year of manufacture: | 1967 |
| Total airframe hrs: | 5567 hours |
| Engine model: | Continental IO-360-D |
| Fatalities: | Fatalities: 3 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Avon Park, Highlands County, Florida -
 United States of America
|
| Phase: | En route |
| Nature: | Unknown |
| Departure airport: | Avon Park, FL (AGR) |
| Avon Park, FL (AGR) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
Prior to the flight, the crew attended a mass briefing with the military training exercise personnel for whose operations the flight was to provide aerial support. The briefing included weather forecast information but did not include any indication of rain showers, thunderstorms, or other hazardous weather over the military operations area or near the landing airport for the period of operations. During the flight, the weather in the area began to deteriorate. Other pilots, ground personnel, and witnesses reported periods of heavy rain and reduced visibility. Infrared satellite imagery for the time period of the accident flight depicted an area of cumulus congestus cloud development over south-central Florida, north of a stationary frontal boundary, moving north. Ground personnel were monitoring the deteriorating weather as the accident airplane continued its mission. Although there may have been discussions of a weather recall, the evidence indicates that this did not occur. The accident pilot likely discontinued his mission and initiated a return to the airport due to the weather conditions. The airplane was not equipped with weather radar. As the airplane approached the airport from the north in night conditions, it encountered the edge of an area of echoes with a maximum core reflectivity of 55 decibels; such echoes are capable of producing severe turbulence and strong outflow winds. The right wing separated in flight, and the airplane crashed inverted in a farm pasture west of the airfield. An examination of the wreckage did not reveal evidence of a preexisting mechanical malfunction or failure. All observed fracture surfaces on the right wing showed indications of overstress.
Probable Cause: The pilot's inadvertent encounter with an unexpected intense rain shower with severe turbulence at night.
Accident investigation:
 |
|
Sources:
NTSB
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 18-Nov-2010 22:22 | slowkid | Added |
| 30-Nov-2010 05:30 | rvargast17 | Updated [Cn] |
| 21-Dec-2016 19:25 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 26-Nov-2017 18:37 | ASN Update Bot | Updated [Cn, Operator, Other fatalities, Nature, Departure airport, Destination airport, Source, Narrative] |
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