Learjet has control problems on landing roll, runway excursion.

Attributes
ACN	287283
Time
Date	199410
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : fca
State Reference	MT
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : bil
Operator	other
Make Model Name	Light Transport, Low Wing, 2 Turbojet Eng
Flight Phase	landing other
Flight Plan	IFR
Person 1
Affiliation	company : air taxi
Function	flight crew : first officer
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 90 flight time total : 6200 flight time type : 1300
ASRS Report	287283
Person 2
Affiliation	company : air taxi
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical other anomaly other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : unable
Consequence	other Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

WX at fca was 700 ft overcast, visibility 7 wind 110 degrees at 14 KTS magnetic. We touched down at reference minus 5, or 117 KIAS indicated. Reversers were deployed to idle reverse (landed runway 2). Brakes were applied and the aircraft pulled sharply to the left. 1/2-3/4 in slush on runway. The PF/captain was not able to re-establish full directional control, and the aircraft departed the runway on the left. No injuries to occupants, and slight damage to the aircraft. Mechanics found that the right antiskid had failed in such a way that cockpit annunciators did not light. Learjet has been informed of the incident. It is not clear if the PF could have prevented the occurrence.

Original NASA ASRS Text

Title: LEARJET HAS CTL PROBS ON LNDG ROLL, RWY EXCURSION.

Narrative: WX AT FCA WAS 700 FT OVCST, VISIBILITY 7 WIND 110 DEGS AT 14 KTS MAGNETIC. WE TOUCHED DOWN AT REF MINUS 5, OR 117 KIAS INDICATED. REVERSERS WERE DEPLOYED TO IDLE REVERSE (LANDED RWY 2). BRAKES WERE APPLIED AND THE ACFT PULLED SHARPLY TO THE L. 1/2-3/4 IN SLUSH ON RWY. THE PF/CAPT WAS NOT ABLE TO RE-ESTABLISH FULL DIRECTIONAL CTL, AND THE ACFT DEPARTED THE RWY ON THE L. NO INJURIES TO OCCUPANTS, AND SLIGHT DAMAGE TO THE ACFT. MECHS FOUND THAT THE R ANTISKID HAD FAILED IN SUCH A WAY THAT COCKPIT ANNUNCIATORS DID NOT LIGHT. LEARJET HAS BEEN INFORMED OF THE INCIDENT. IT IS NOT CLR IF THE PF COULD HAVE PREVENTED THE OCCURRENCE.

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.