ASN Wikibase Occurrence # 131562
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| Date: | Sunday 19 June 2011 |
| Time: | 08:42 |
| Type: |  Cirrus SR22 GTS G3 |
| Owner/operator: | Buds Aviation LLC |
| Registration: | N526PG |
| MSN: | 2963 |
| Year of manufacture: | 2008 |
| Total airframe hrs: | 483 hours |
| Engine model: | Continental IO-550-N |
| Fatalities: | Fatalities: 2 / Occupants: 2 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Rickenbacker International Airport - KLCK, OH -
 United States of America
|
| Phase: | Take off |
| Nature: | Private |
| Departure airport: | Columbus, OH (LCK) |
| Caldwell, NJ | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
After takeoff in instrument meteorological conditions, the airplane was cleared for a left turn. Shortly thereafter, the airplane entered a left climbing turn, and the pilot engaged the autopilot. The flight director subsequently commanded a right roll and a decrease in pitch attitude. (The GPS steering command was set to navigate to a waypoint, and the shortest way to get there was a turn to the right.) The airspeed decreased to 105 knots and the bank angle was over 45 degrees left-wing low, so the aural underspeed alert activated because of the risk of stall. The nose-up pitch attitude decreased through level flight and entered a nose-down attitude; the left bank angle continued to increase. The underspeed alert ceased when the airplane reached an airspeed of 141 knots; the airplane was at a maximum left bank angle of 72 degrees and a maximum nose-down attitude of 24 degrees. Recorded data showed the engine was producing power throughout the flight and the autopilot was operating normally. An examination of the engine and airplane revealed no evidence of mechanical malfunctions or failures that would have precluded normal operations. Given that the autopilot was set such that it would command a right turn when engaged, yet the pilot was instructed by the air traffic controller to turn left, it is likely that the pilot was overpowering the autopilot system to comply with the instructions. According to the airplane manufacturer, it would only take 17 pounds of force to override the autopilot in pitch and 3 to 5 pounds to override the roll. Further, given the instrument conditions that were present at the time, it is likely that the pilot experience spatial disorientation and did not recognize the effects of his inputs.
oxicological results indicated the pilot had taken a sedating medication at some point before the accident; however, the levels were such that a determination of the level of impairment was not possible.
Probable Cause: The pilot's spatial disorientation during the takeoff into instrument meteorological conditions, which resulted in his failure to maintain control of the airplane.
Accident investigation:
 |
|
Sources:
NTSB
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 19-Jun-2011 08:17 | RobertMB | Added |
| 19-Jun-2011 08:29 | RobertMB | Updated [Date, Time, Aircraft type, Registration, Cn, Operator, Departure airport, Destination airport, Source, Narrative, Plane category, ] |
| 19-Jun-2011 08:36 | RobertMB | Updated [Registration] |
| 20-Jun-2011 07:56 | Anon. | Updated [Source] |
| 21-Dec-2016 19:25 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 27-Nov-2017 16:55 | ASN Update Bot | Updated [Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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