ASN Wikibase Occurrence # 293922
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| Date: | Sunday 10 April 2005 |
| Time: | 13:30 LT |
| Type: |  Mooney M20M |
| Owner/operator: | Wings Northwest LLC |
| Registration: | N21816 |
| MSN: | 27-0277 |
| Year of manufacture: | 1999 |
| Engine model: | Lycoming TIO-540-AF1B |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Lincoln, Nebraska -
 United States of America
|
| Phase: | Unknown |
| Nature: | Executive |
| Departure airport: | Columbia Regional Airport, MO (COU/KCOU) |
| Scottsbluff County Airport, NE (BFF/KBFF) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The airplane sustained substantial damage during recovery from a loss of control during instrument meteorological conditions (IMC) when the airplane encountered severe turbulence at 16,000 feet mean sea level (msl) and recovered at 6,000 feet msl before executing a precautionary landing. The commercial pilot reported that a thorough preflight weather briefing was obtained from the Flight Service Station (FSS). Due to severe weather reported in Kansas and Colorado, the pilot filed a route of flight that was further north through Nebraska. The pilot reported, "While in level cruise flight in IMC at 16,000' I suddenly encountered an unanticipated severe downdraft that caused a temporary loss of control of the aircraft. The plane was suddenly in a rapidly descending spiral. I was able to regain control and level off at 6,000' in VMC." The pilot executed a precautionary landing at the nearest suitable airport. While taxiing to the ramp, the right landing gear collapsed. The inspection of the airplane revealed that the right landing gear had collapsed, the wing spar was bent, and the wings were wrinkled. A representative from the airplane's manufacturer reported that the damage to the airplane indicated that the airplane experienced about 12g's of force during the recovery from the turbulence event. The airplane's storm scope was tested by a repair facility after the accident and it tested within normal specifications. There had been no pilot reports (PIREPS) along the pilot's route of flight at the time of the weather brief. A review of the air traffic control (ATC) tapes revealed that the ATC controller and the pilot did not have any communications about turbulence or severe weather prior to the upset occurring.
Probable Cause: The pilot inadvertently exceeded the design limits of the airplane during the recovery from the loss of control due to the unanticipated severe turbulence. Factors to the accident were the turbulence in clouds and the main landing gear collapse.
Accident investigation:
 |
|
Sources:
NTSB CHI05CA092
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 10-Oct-2022 15:07 | ASN Update Bot | Added |
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