Narrative:

I was sic and PF of a gulfstream 200; that experienced a runway excursion while landing. VFR conditions existed; with winds 33010. A visual approach backed up by the ILS was conducted to runway 24. The aircraft was stabilized throughout all phases of the approach to touchdown. Normal braking was applied and the aircraft veered left; I released the left brake and applied right rudder trying to bring the aircraft back on track with negative results. More right rudder and right braking was applied; however; the aircraft continued on its left track. I then called out for help and simultaneously felt the captain's feet on the right rudder and right brake; which I had now pushed full travel. The aircraft continued to pull left and exited the runway. Once on the grass; we were able to regain directional control using the rudder and returned the aircraft to the runway to complete the rollout. Thrust reversers were not deployed; because directional control was the priority immediately after touchdown. All system appeared to be working and the aircraft was taxied to parking. The aircraft was inspected and damage to the right kruger flap; right flap and puncture to the right wing leading edge above the kruger flap was found. Inspection of the runway by an airport employee; found that a taxi sign had apparently been hit during the deviation. After much thought I suspect that the left brake failed to release when commanded; however I must state that this is pure speculation. The aircraft also was very close to maximum landing weight; reference was 140 KTS; which under normal conditions would not have been a problem; however; weight and momentum with the sudden pull to the left; may have contributed to the lack of effective rudder control. Callback conversation with reporter revealed the following information: reporter stated that there was no obstruction to rudder or brake pedal movement while the pilots were attempting to regain control. Manufacturer's inspection revealed a brake defect on the aircraft. The nose gear was found to be out of alignment; although this could have been caused by the excursion.

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Original NASA ASRS Text

Title: G200 VEERED LEFT AFTER TOUCHDOWN; AND DIRECTIONAL CONTROL COULD NOT BE MAINTAINED BY RUDDER OR BRAKE APPLICATION. ACFT DEPARTED THE RWY.

Narrative: I WAS SIC AND PF OF A GULFSTREAM 200; THAT EXPERIENCED A RWY EXCURSION WHILE LNDG. VFR CONDITIONS EXISTED; WITH WINDS 33010. A VISUAL APCH BACKED UP BY THE ILS WAS CONDUCTED TO RWY 24. THE ACFT WAS STABILIZED THROUGHOUT ALL PHASES OF THE APCH TO TOUCHDOWN. NORMAL BRAKING WAS APPLIED AND THE ACFT VEERED L; I RELEASED THE L BRAKE AND APPLIED R RUDDER TRYING TO BRING THE ACFT BACK ON TRACK WITH NEGATIVE RESULTS. MORE R RUDDER AND R BRAKING WAS APPLIED; HOWEVER; THE ACFT CONTINUED ON ITS L TRACK. I THEN CALLED OUT FOR HELP AND SIMULTANEOUSLY FELT THE CAPT'S FEET ON THE R RUDDER AND R BRAKE; WHICH I HAD NOW PUSHED FULL TRAVEL. THE ACFT CONTINUED TO PULL L AND EXITED THE RWY. ONCE ON THE GRASS; WE WERE ABLE TO REGAIN DIRECTIONAL CTL USING THE RUDDER AND RETURNED THE ACFT TO THE RWY TO COMPLETE THE ROLLOUT. THRUST REVERSERS WERE NOT DEPLOYED; BECAUSE DIRECTIONAL CTL WAS THE PRIORITY IMMEDIATELY AFTER TOUCHDOWN. ALL SYS APPEARED TO BE WORKING AND THE ACFT WAS TAXIED TO PARKING. THE ACFT WAS INSPECTED AND DAMAGE TO THE R KRUGER FLAP; R FLAP AND PUNCTURE TO THE R WING LEADING EDGE ABOVE THE KRUGER FLAP WAS FOUND. INSPECTION OF THE RWY BY AN ARPT EMPLOYEE; FOUND THAT A TAXI SIGN HAD APPARENTLY BEEN HIT DURING THE DEV. AFTER MUCH THOUGHT I SUSPECT THAT THE L BRAKE FAILED TO RELEASE WHEN COMMANDED; HOWEVER I MUST STATE THAT THIS IS PURE SPECULATION. THE ACFT ALSO WAS VERY CLOSE TO MAX LNDG WT; REF WAS 140 KTS; WHICH UNDER NORMAL CONDITIONS WOULD NOT HAVE BEEN A PROB; HOWEVER; WT AND MOMENTUM WITH THE SUDDEN PULL TO THE L; MAY HAVE CONTRIBUTED TO THE LACK OF EFFECTIVE RUDDER CTL. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: REPORTER STATED THAT THERE WAS NO OBSTRUCTION TO RUDDER OR BRAKE PEDAL MOVEMENT WHILE THE PLTS WERE ATTEMPTING TO REGAIN CONTROL. MANUFACTURER'S INSPECTION REVEALED A BRAKE DEFECT ON THE ACFT. THE NOSE GEAR WAS FOUND TO BE OUT OF ALIGNMENT; ALTHOUGH THIS COULD HAVE BEEN CAUSED BY THE EXCURSION.

Data retrieved from NASA's ASRS site as of January 2009 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.