Flight crew of MD83 making a CAT ii landing has loss of aircraft control due to runway covered with ...

Attributes
ACN	383607
Time
Date	199710
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : anc
State Reference	AK
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : cle
Operator	common carrier : air carrier
Make Model Name	MD-83
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 6000 flight time type : 3500
ASRS Report	383607
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	other anomaly other anomaly other
Independent Detector	other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Weather
Air Traffic Incident	other

Narrative:

I was flying as first officer in an MD80. The flight was from sea to anc. WX in anc was 600 ft overcast, 1/4 mi visibility with blowing snow and mist. The wind was 330 degrees at 14 KTS, and we were landing runway 6R. Runway 6R was covered with snow and ice with braking action reported as fair. Because of the low WX minima, and the fact that the captain was restr to a CAT ii landing (due to being a new captain), we flew a CAT ii autoland approach. The approach was normal and the autolndg was normal. Upon rollout the aircraft deviated (1/4 DOT RMI) from the centerline (also normal), and initiated a correction north. The correction was correct and within normal limits, but the aircraft began to slide toward the north side of the runway. The captain disconnected the autoplt and took over manually. Braking and steering were ineffective, so the aircraft was brought to a stop and directional control maintained using differential reverse thrust. The aircraft ran over and destroyed 5 runway edge lights. The aircraft was inspected on the taxiway by maintenance and no damage was found. Contributing factors were bald, but within limits of wear, main tires. A 14 KT crosswind and a runway braking condition of nil, but reported as fair. Additional factors may be attributed to the federal requirement that the low time captain make a CAT ii autoland. The CAT ii autoland restricts the pilot from developing a feel for the aircraft until after landing. A CAT ii landing from an ILS, that is, not an autolndg, might have prevented the runway deviation.

Original NASA ASRS Text

Title: FLC OF MD83 MAKING A CAT II LNDG HAS LOSS OF ACFT CTL DUE TO RWY COVERED WITH SNOW AND ICE. BRAKING RPTED AS FAIR BUT ACTUALLY NIL.

Narrative: I WAS FLYING AS FO IN AN MD80. THE FLT WAS FROM SEA TO ANC. WX IN ANC WAS 600 FT OVCST, 1/4 MI VISIBILITY WITH BLOWING SNOW AND MIST. THE WIND WAS 330 DEGS AT 14 KTS, AND WE WERE LNDG RWY 6R. RWY 6R WAS COVERED WITH SNOW AND ICE WITH BRAKING ACTION RPTED AS FAIR. BECAUSE OF THE LOW WX MINIMA, AND THE FACT THAT THE CAPT WAS RESTR TO A CAT II LNDG (DUE TO BEING A NEW CAPT), WE FLEW A CAT II AUTOLAND APCH. THE APCH WAS NORMAL AND THE AUTOLNDG WAS NORMAL. UPON ROLLOUT THE ACFT DEVIATED (1/4 DOT RMI) FROM THE CTRLINE (ALSO NORMAL), AND INITIATED A CORRECTION N. THE CORRECTION WAS CORRECT AND WITHIN NORMAL LIMITS, BUT THE ACFT BEGAN TO SLIDE TOWARD THE N SIDE OF THE RWY. THE CAPT DISCONNECTED THE AUTOPLT AND TOOK OVER MANUALLY. BRAKING AND STEERING WERE INEFFECTIVE, SO THE ACFT WAS BROUGHT TO A STOP AND DIRECTIONAL CTL MAINTAINED USING DIFFERENTIAL REVERSE THRUST. THE ACFT RAN OVER AND DESTROYED 5 RWY EDGE LIGHTS. THE ACFT WAS INSPECTED ON THE TXWY BY MAINT AND NO DAMAGE WAS FOUND. CONTRIBUTING FACTORS WERE BALD, BUT WITHIN LIMITS OF WEAR, MAIN TIRES. A 14 KT XWIND AND A RWY BRAKING CONDITION OF NIL, BUT RPTED AS FAIR. ADDITIONAL FACTORS MAY BE ATTRIBUTED TO THE FEDERAL REQUIREMENT THAT THE LOW TIME CAPT MAKE A CAT II AUTOLAND. THE CAT II AUTOLAND RESTRICTS THE PLT FROM DEVELOPING A FEEL FOR THE ACFT UNTIL AFTER LNDG. A CAT II LNDG FROM AN ILS, THAT IS, NOT AN AUTOLNDG, MIGHT HAVE PREVENTED THE RWY DEV.

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.

Flight crew of MD83 making a CAT ii landing has loss of aircraft control due to runway covered with snow and ice. Braking reported as fair but actually nil.