Medium large transport slides off taxiway at ymx.

Attributes
ACN	427885
Time
Date	199902
Day	Wed
Local Time Of Day	0001 To 0600
Place
Locale Reference	atc facility : ymx airport : ymy
State Reference	PQ
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Flight Phase	ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer
Experience	flight time last 90 days : 100 flight time total : 15000 flight time type : 10000
ASRS Report	427885
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial
Events
Anomaly	other anomaly other anomaly other other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

A normal landing at ymx runway 24 was made. Visibility was good and runway was mostly clear and dry. ATIS reported all txwys as having 100% rough ice. I brought aircraft to complete stop before exiting runway. I taxied onto taxiway at a speed best described as a slow walk. At about 20 ft onto taxiway I started a slow slide to the right. Using braking, differential power, and nosewheel steering I tried to keep aircraft on taxiway to no avail. Right main wheels exited taxiway about 4-5 ft. Nosewheel and left main remained on taxiway. With help of air carrier personnel and ymx airport personnel, I decided to dig out around right main (it was in 4-5 inches of snow with hard pack underneath, sand around tires, sand taxiway as ymx was now calling for -- possible glare ice, all txwys). After about 1 1/2 hours of preparation, I powered back onto taxiway and to the ramp. No damage was done to aircraft or taxiway lights, etc.

Original NASA ASRS Text

Title: MLG SLIDES OFF TXWY AT YMX.

Narrative: A NORMAL LNDG AT YMX RWY 24 WAS MADE. VISIBILITY WAS GOOD AND RWY WAS MOSTLY CLR AND DRY. ATIS RPTED ALL TXWYS AS HAVING 100% ROUGH ICE. I BROUGHT ACFT TO COMPLETE STOP BEFORE EXITING RWY. I TAXIED ONTO TXWY AT A SPD BEST DESCRIBED AS A SLOW WALK. AT ABOUT 20 FT ONTO TXWY I STARTED A SLOW SLIDE TO THE R. USING BRAKING, DIFFERENTIAL PWR, AND NOSEWHEEL STEERING I TRIED TO KEEP ACFT ON TXWY TO NO AVAIL. R MAIN WHEELS EXITED TXWY ABOUT 4-5 FT. NOSEWHEEL AND L MAIN REMAINED ON TXWY. WITH HELP OF ACR PERSONNEL AND YMX ARPT PERSONNEL, I DECIDED TO DIG OUT AROUND R MAIN (IT WAS IN 4-5 INCHES OF SNOW WITH HARD PACK UNDERNEATH, SAND AROUND TIRES, SAND TXWY AS YMX WAS NOW CALLING FOR -- POSSIBLE GLARE ICE, ALL TXWYS). AFTER ABOUT 1 1/2 HRS OF PREPARATION, I POWERED BACK ONTO TXWY AND TO THE RAMP. NO DAMAGE WAS DONE TO ACFT OR TXWY LIGHTS, ETC.

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.