A BE2000 on landing rollout had the brake anti-skid and propeller reversing system inoperative cause...

Attributes
ACN	431166
Time
Date	199903
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : inp
State Reference	PA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : corporate
Make Model Name	Starship Model 2000
Navigation In Use	Other Other
Flight Phase	landing other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : commercial
Experience	flight time last 90 days : 92 flight time total : 5175 flight time type : 90
ASRS Report	431166
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : commercial
Events
Anomaly	aircraft equipment problem : critical other anomaly
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

On landing rollout, the PF (copilot) tried ground-fine to stop the airplane and also the wheel brakes. At 2000 ft down a 4000 ft runway, I mentioned that we were running out of runway, at which point he stated that he didn't have ground fire or wheel brakes. I applied brakes and they were not responding. Next I tried for 'reverse' with the power levers and there was no change in deceleration. The next action was to shut off the 'anti-skid' which gave us power brakes and the aircraft came to a complete stop at the very end of the runway. No aircraft damage and no crew or passenger injuries. The wheel speed transducers were found to not have the proper voltage and they were sensing a 'skid' which released the wheel brakes. Callback conversation with reporter revealed the following information: the reporter stated the anti-skid problem was caused by failure of the main wheel transducers and the failure of the propeller reversers was the failure of the air-ground squat switch which sensed the aircraft still in the air. The reporter said the aircraft had no previous history of brake or reversing problems.

Original NASA ASRS Text

Title: A BE2000 ON LNDG ROLLOUT HAD THE BRAKE ANTI-SKID AND PROP REVERSING SYS INOP CAUSED BY THE MAIN WHEEL TRANSDUCERS AND AN AIR-GND GEAR SQUAT SWITCH FAILURE.

Narrative: ON LNDG ROLLOUT, THE PF (COPLT) TRIED GROUND-FINE TO STOP THE AIRPLANE AND ALSO THE WHEEL BRAKES. AT 2000 FT DOWN A 4000 FT RWY, I MENTIONED THAT WE WERE RUNNING OUT OF RWY, AT WHICH POINT HE STATED THAT HE DIDN'T HAVE GND FIRE OR WHEEL BRAKES. I APPLIED BRAKES AND THEY WERE NOT RESPONDING. NEXT I TRIED FOR 'REVERSE' WITH THE PWR LEVERS AND THERE WAS NO CHANGE IN DECELERATION. THE NEXT ACTION WAS TO SHUT OFF THE 'ANTI-SKID' WHICH GAVE US PWR BRAKES AND THE ACFT CAME TO A COMPLETE STOP AT THE VERY END OF THE RWY. NO ACFT DAMAGE AND NO CREW OR PAX INJURIES. THE WHEEL SPD TRANSDUCERS WERE FOUND TO NOT HAVE THE PROPER VOLTAGE AND THEY WERE SENSING A 'SKID' WHICH RELEASED THE WHEEL BRAKES. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE ANTI-SKID PROB WAS CAUSED BY FAILURE OF THE MAIN WHEEL TRANSDUCERS AND THE FAILURE OF THE PROP REVERSERS WAS THE FAILURE OF THE AIR-GND SQUAT SWITCH WHICH SENSED THE ACFT STILL IN THE AIR. THE RPTR SAID THE ACFT HAD NO PREVIOUS HISTORY OF BRAKE OR REVERSING PROBS.

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.

A BE2000 on landing rollout had the brake anti-skid and propeller reversing system inoperative caused by the main wheel transducers and an air-ground gear squat switch failure.