Narrative:

After being cleared for the ILS runway 12 approach by ZLC, we proceeded to the bzn VOR and began to fly the charted approach procedure. Contacted bzn radio and was told to report 'manni' inbound. Completed checklists -- called 'manni' inbound to runway 12. Saw runway environment at about 400 ft AGL. Runway appeared to be covered in hard packed snow. Did not see VASI. Made all required company callouts on final. Captain stated his intention to land. Captain made smooth landing and selected reverse thrust and brakes which appeared to be not very effective. Captain then selected full reverse and brakes being careful to avoid asymmetry. Anti-skid was cycling normally. Aircraft decelerated very slowly. I called out 100 KTS, 80 KTS, 60 KTS. Started to get compressor stalls. Became apparent that we were not going to stop by the end of the runway. Exited the end of the runway into hard-packed dirt and snow still in full reverse and full brakes. Aircraft came to rest approximately 50 ft beyond end of runway 12. Captain then selected idle thrust. Captain notified passenger via PA to remain seated. I notified bzn FSS of our position and requested equipment to meet aircraft. Captain told bzn radio of our inability to stop and suggested that operations be suspended at bzn airport. We completed parking and securing checklists -- shut engines down put APU power on aircraft. No injuries to pay or crew. No apparent damage to aircraft. Passenger exited via forward airstairs into vans and were bussed to terminal. Aircraft towed back onto runway later that day. We started engines and taxied to gate.

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Original NASA ASRS Text

Title: FLC OF AN MLG LOST CTL OF ACFT DURING LNDG ROLL ON SNOW PACKED RWY RESULTING IN SLIDING OFF THE END OF RWY. THERE WERE NO INJURIES OR DAMAGE TO THE ACFT.

Narrative: AFTER BEING CLRED FOR THE ILS RWY 12 APCH BY ZLC, WE PROCEEDED TO THE BZN VOR AND BEGAN TO FLY THE CHARTED APCH PROC. CONTACTED BZN RADIO AND WAS TOLD TO RPT 'MANNI' INBOUND. COMPLETED CHKLISTS -- CALLED 'MANNI' INBOUND TO RWY 12. SAW RWY ENVIRONMENT AT ABOUT 400 FT AGL. RWY APPEARED TO BE COVERED IN HARD PACKED SNOW. DID NOT SEE VASI. MADE ALL REQUIRED COMPANY CALLOUTS ON FINAL. CAPT STATED HIS INTENTION TO LAND. CAPT MADE SMOOTH LNDG AND SELECTED REVERSE THRUST AND BRAKES WHICH APPEARED TO BE NOT VERY EFFECTIVE. CAPT THEN SELECTED FULL REVERSE AND BRAKES BEING CAREFUL TO AVOID ASYMMETRY. ANTI-SKID WAS CYCLING NORMALLY. ACFT DECELERATED VERY SLOWLY. I CALLED OUT 100 KTS, 80 KTS, 60 KTS. STARTED TO GET COMPRESSOR STALLS. BECAME APPARENT THAT WE WERE NOT GOING TO STOP BY THE END OF THE RWY. EXITED THE END OF THE RWY INTO HARD-PACKED DIRT AND SNOW STILL IN FULL REVERSE AND FULL BRAKES. ACFT CAME TO REST APPROX 50 FT BEYOND END OF RWY 12. CAPT THEN SELECTED IDLE THRUST. CAPT NOTIFIED PAX VIA PA TO REMAIN SEATED. I NOTIFIED BZN FSS OF OUR POS AND REQUESTED EQUIP TO MEET ACFT. CAPT TOLD BZN RADIO OF OUR INABILITY TO STOP AND SUGGESTED THAT OPS BE SUSPENDED AT BZN ARPT. WE COMPLETED PARKING AND SECURING CHKLISTS -- SHUT ENGS DOWN PUT APU PWR ON ACFT. NO INJURIES TO PAY OR CREW. NO APPARENT DAMAGE TO ACFT. PAX EXITED VIA FORWARD AIRSTAIRS INTO VANS AND WERE BUSSED TO TERMINAL. ACFT TOWED BACK ONTO RWY LATER THAT DAY. WE STARTED ENGS AND TAXIED TO GATE.

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.