Narrative:

While in level flight at FL330 mach .80; the pilot in the right seat exited the cockpit to perform required duties in the aircraft cabin. Upon exiting the cockpit; the pilot's pants cuff or foot made contact with the slat/flap control lever deploying the slat/flaps. The first indication was the aircraft began to buffet followed by a nose down pitching moment. While diagnosing what was causing the buffeting and pitching moment; the pitch feel and mach trim lights illuminated on the annunciator panel. This was followed by an autopilot disconnect and the aircraft rolled abruptly to the right to 30-45 degrees.at this time air brakes were deployed to reduce aircraft speed from .80 mach to .76 mach. After the aircraft was righted and slowed; it was noted that the slat deployed 'green light' was illuminated and that the slat/flap handle was in the flaps twenty position. The slat/flap handle was returned to the clean position and the aircraft was visually inspected from the cabin to assure that no visual damage was apparent from the aircraft cabin. After visual verification of no damage; the aircraft was flown at 250 KTS indicated until the aircraft was slowed to configure for landing.configuring for landing was done methodically and the aircraft handling was evaluated with each slat/flap configuration. Once it was determined that the aircraft was handling as expected with each flap change; it was determined that a normal flaps forty landing wouldn't pose a problem. After landing it was decided to raise the flaps no further than the flaps twenty position to prevent any further/possible damage to the slats/flaps and to aid in inspection.

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Original NASA ASRS Text

Title: An FA90 flight crew accidentally extended the flaps and slats at FL330/.80M when the First Officer's pant leg snagged on and deployed the extend lever. A short term loss of control was experienced as they sought to restore a clean configuration.

Narrative: While in level flight at FL330 Mach .80; the pilot in the right seat exited the cockpit to perform required duties in the aircraft cabin. Upon exiting the cockpit; the pilot's pants cuff or foot made contact with the slat/flap control lever deploying the slat/flaps. The first indication was the aircraft began to buffet followed by a nose down pitching moment. While diagnosing what was causing the buffeting and pitching moment; the Pitch Feel and Mach Trim lights illuminated on the annunciator panel. This was followed by an autopilot disconnect and the aircraft rolled abruptly to the right to 30-45 degrees.At this time air brakes were deployed to reduce aircraft speed from .80 Mach to .76 Mach. After the aircraft was righted and slowed; it was noted that the slat deployed 'Green Light' was illuminated and that the slat/flap handle was in the flaps twenty position. The slat/flap handle was returned to the clean position and the aircraft was visually inspected from the cabin to assure that no visual damage was apparent from the aircraft cabin. After visual verification of no damage; the aircraft was flown at 250 KTS indicated until the aircraft was slowed to configure for landing.Configuring for landing was done methodically and the aircraft handling was evaluated with each slat/flap configuration. Once it was determined that the aircraft was handling as expected with each flap change; it was determined that a normal flaps forty landing wouldn't pose a problem. After landing it was decided to raise the flaps no further than the flaps twenty position to prevent any further/possible damage to the slats/flaps and to aid in inspection.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.