ASN Wikibase Occurrence # 314555
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| Date: | Monday 13 December 2010 |
| Time: | 08:30 LT |
| Type: |  Piaggio P180 |
| Owner/operator: | Avantair, Inc. |
| Registration: | N140SL |
| MSN: | 1107 |
| Total airframe hrs: | 5006 hours |
| Engine model: | P&W Canada PT6A-66 |
| Fatalities: | Fatalities: 0 / Occupants: 4 |
| Aircraft damage: | None |
| Category: | Serious incident |
| Location: | Columbus, Ohio -
 United States of America
|
| Phase: | Approach |
| Nature: | Unknown |
| Departure airport: | White Plains-Westchester County Airport, NY (HPN/KHPN) |
| Columbus-John Glenn International Airport, OH (CMH/KCMH) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
During the airplane's descent, the yaw damper disengaged while the autopilot remained on. When the flightcrew checked the flight controls for freedom of control, the ailerons, elevator, and rudder were found to be frozen in place. The flightcrew exerted enough pressure until the controls broke free with a 'snap.â The flight controls remained stiff for the remainder of the flight. The temperature was -9 degrees C at the destination. Following a normal approach and landing, the flight controls and nosewheel steering became inoperative. The flightcrew used differential power and braking to taxi to the ramp. A postflight examination by maintenance personnel revealed ice in the area of frame 36 and around the primary flight control cables and pulleys in that area. An examination of the fuselage drain holes showed no obstructions and the airplane was returned to service. An emergency airworthiness directive was subsequently issued that advised of three incidents and that required inspection of the fuselage belly and testing of the fuselage drain holes.
Probable Cause: The failure of water to properly drain through the fuselage drain holes, thus becoming trapped and freezing around the flight control cables, which resulted in the loss of control authority to the airplane's ailerons, elevator, and rudder.
Accident investigation:
 |
|
Sources:
NTSB CEN11IA108
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 02-Jun-2023 18:36 | ASN Update Bot | Added |
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