Narrative:

On normal landing brakes were apparently on without pilot input and aircraft came to a stop on a snow covered runway with all 4 main tires flat. Not sure what happened. Possible anti-skid or parking brake malfunction due to cold WX/de- icing. Callback conversation with reporter revealed the following: reporter stated that the aircraft was a DC9-30 type aircraft and subsequent investigation by the FAA and the aircraft manufacturer did not reveal any abnormality of the braking system, including the anti-skid system, except for a loose wire on one side. The aircraft manufacturing representative could not give any reason for the problem. The reporter further stated that the aircraft had a problem during the takeoff prior to this landing. It seems that the first officer had trouble during the takeoff wherein directional control was lost during the takeoff roll and the reporting captain had taken over and lifted the aircraft into the air to prevent going off the side of the runway. He thought it may have been caused by the parking brake inadvertently left on during takeoff. However, in our discussion this was ruled out since the captain remembers the aircraft rolling after brake release. He now believes that the first officer could have 'ridden' the brakes both on takeoff and landing causing the anti-skid system to not be useful on landing since the wheels were not able to spin up to the minimum of 40 KTS to react. Therefore, the brakes could have been all locked during touchdown. He thanked me for the call and observations suggestions.

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Original NASA ASRS Text

Title: FLC OF AN MLG ACR ACFT HAD ALL 4 MAIN LNDG GEAR TIRES FLAT AFTER LNDG ROLL ON A SNOW COVERED RWY.

Narrative: ON NORMAL LNDG BRAKES WERE APPARENTLY ON WITHOUT PLT INPUT AND ACFT CAME TO A STOP ON A SNOW COVERED RWY WITH ALL 4 MAIN TIRES FLAT. NOT SURE WHAT HAPPENED. POSSIBLE ANTI-SKID OR PARKING BRAKE MALFUNCTION DUE TO COLD WX/DE- ICING. CALLBACK CONVERSATION WITH REPORTER REVEALED THE FOLLOWING: RPTR STATED THAT THE ACFT WAS A DC9-30 TYPE ACFT AND SUBSEQUENT INVESTIGATION BY THE FAA AND THE ACFT MANUFACTURER DID NOT REVEAL ANY ABNORMALITY OF THE BRAKING SYS, INCLUDING THE ANTI-SKID SYS, EXCEPT FOR A LOOSE WIRE ON ONE SIDE. THE ACFT MANUFACTURING REPRESENTATIVE COULD NOT GIVE ANY REASON FOR THE PROB. THE RPTR FURTHER STATED THAT THE ACFT HAD A PROB DURING THE TKOF PRIOR TO THIS LNDG. IT SEEMS THAT THE FO HAD TROUBLE DURING THE TKOF WHEREIN DIRECTIONAL CTL WAS LOST DURING THE TKOF ROLL AND THE RPTING CAPT HAD TAKEN OVER AND LIFTED THE ACFT INTO THE AIR TO PREVENT GOING OFF THE SIDE OF THE RWY. HE THOUGHT IT MAY HAVE BEEN CAUSED BY THE PARKING BRAKE INADVERTENTLY LEFT ON DURING TKOF. HOWEVER, IN OUR DISCUSSION THIS WAS RULED OUT SINCE THE CAPT REMEMBERS THE ACFT ROLLING AFTER BRAKE RELEASE. HE NOW BELIEVES THAT THE FO COULD HAVE 'RIDDEN' THE BRAKES BOTH ON TKOF AND LNDG CAUSING THE ANTI-SKID SYS TO NOT BE USEFUL ON LNDG SINCE THE WHEELS WERE NOT ABLE TO SPIN UP TO THE MINIMUM OF 40 KTS TO REACT. THEREFORE, THE BRAKES COULD HAVE BEEN ALL LOCKED DURING TOUCHDOWN. HE THANKED ME FOR THE CALL AND OBSERVATIONS SUGGESTIONS.

Data retrieved from NASA's ASRS site as of July 2007 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.