An air carrier B737 flight crew had a runway excursion when they landed on a slick runway with a dir...

Attributes
ACN	383686
Time
Date	199710
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : ida
State Reference	ID
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-200
Operating Under FAR Part	Part 121
Flight Phase	landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : private
Experience	flight time last 90 days : 160 flight time total : 10194 flight time type : 1889
ASRS Report	383686
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 175 flight time total : 19546 flight time type : 2938
ASRS Report	383948
Events
Anomaly	inflight encounter : weather other anomaly other anomaly other other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : regained aircraft control none taken : unable
Consequence	Other
Supplementary
Primary Problem	Weather
Air Traffic Incident	other

Narrative:

This statement concerns the operation of a flight between slc-ida on oct/thu/97. This was the second day of a 4 day rotation departing oct/wed/97. On oct/thu/97, the first leg of the day was flight from phl-slc. The second leg was flight from slc-ida. I served as first officer and PF of that flight. I was accompanied by a captain, who was PNF. The aircraft was a B737- 200. The takeoff, departure, en route, arrival and approach phases of flight into ida were uneventful and normal. ZLC cleared flight for an ILS runway 20 approach. On approach to ida runway 20, a complete procedure turn was executed. The autoplt was disconnected for landing. Prior to approach, we contacted the local air carrier's observer (ida) for the latest WX reported. Observer reported the ida WX at XA04Z as 500 ft broken 1600 ft overcast, 3/4 mi visibility with light snow, winds 240 degrees at 10 KTS, temperature 0 degrees C and dewpoint 0 degrees C. The runway 20 touchdown appeared normal. During touchdown, the initial rollout moved quickly to the left, which was not recoverable until an apparent excursion occurred. The aircraft was returned to the center of the runway with rudder and control wheel steering. The remainder of the rollout was normal. We taxied clear of the runway and to the gate. Upon arrival, air carrier operations and maintenance control were notified of the possible excursion. Local (contracted) maintenance was contacted to inspect the aircraft. The aircraft was inspected and cleared for further flight. Additionally prior to arrival we contacted the air carrier WX observer who reported that 40 mins prior to our arrival, an aircraft landed in light snow with good braking. We observed winds to be much stronger, heavy blowing snow, runway surface as 'slick' with approximately 1 1/2 inches of snow on the runway. Braking action was poor to nil. The runway environment was very dark with only runway edge lights visible. After our arrival, winds were reported as 290 degrees at 19 KTS at XC05.

Original NASA ASRS Text

Title: AN ACR B737 FLC HAD A RWY EXCURSION WHEN THEY LANDED ON A SLICK RWY WITH A DIRECT XWIND. THE WX WAS, APPARENTLY, MUCH WORSE THAN RPTED AND THE ACFT SLID OFF THE L SIDE OF THE RWY DURING ITS ROLLOUT THEN RETURNED TO CTRLINE WITH NO DAMAGE.

Narrative: THIS STATEMENT CONCERNS THE OP OF A FLT BTWN SLC-IDA ON OCT/THU/97. THIS WAS THE SECOND DAY OF A 4 DAY ROTATION DEPARTING OCT/WED/97. ON OCT/THU/97, THE FIRST LEG OF THE DAY WAS FLT FROM PHL-SLC. THE SECOND LEG WAS FLT FROM SLC-IDA. I SERVED AS FO AND PF OF THAT FLT. I WAS ACCOMPANIED BY A CAPT, WHO WAS PNF. THE ACFT WAS A B737- 200. THE TKOF, DEP, ENRTE, ARR AND APCH PHASES OF FLT INTO IDA WERE UNEVENTFUL AND NORMAL. ZLC CLRED FLT FOR AN ILS RWY 20 APCH. ON APCH TO IDA RWY 20, A COMPLETE PROC TURN WAS EXECUTED. THE AUTOPLT WAS DISCONNECTED FOR LNDG. PRIOR TO APCH, WE CONTACTED THE LCL ACR'S OBSERVER (IDA) FOR THE LATEST WX RPTED. OBSERVER RPTED THE IDA WX AT XA04Z AS 500 FT BROKEN 1600 FT OVCST, 3/4 MI VISIBILITY WITH LIGHT SNOW, WINDS 240 DEGS AT 10 KTS, TEMP 0 DEGS C AND DEWPOINT 0 DEGS C. THE RWY 20 TOUCHDOWN APPEARED NORMAL. DURING TOUCHDOWN, THE INITIAL ROLLOUT MOVED QUICKLY TO THE L, WHICH WAS NOT RECOVERABLE UNTIL AN APPARENT EXCURSION OCCURRED. THE ACFT WAS RETURNED TO THE CTR OF THE RWY WITH RUDDER AND CTL WHEEL STEERING. THE REMAINDER OF THE ROLLOUT WAS NORMAL. WE TAXIED CLR OF THE RWY AND TO THE GATE. UPON ARR, ACR OPS AND MAINT CTL WERE NOTIFIED OF THE POSSIBLE EXCURSION. LCL (CONTRACTED) MAINT WAS CONTACTED TO INSPECT THE ACFT. THE ACFT WAS INSPECTED AND CLRED FOR FURTHER FLT. ADDITIONALLY PRIOR TO ARR WE CONTACTED THE ACR WX OBSERVER WHO RPTED THAT 40 MINS PRIOR TO OUR ARR, AN ACFT LANDED IN LIGHT SNOW WITH GOOD BRAKING. WE OBSERVED WINDS TO BE MUCH STRONGER, HVY BLOWING SNOW, RWY SURFACE AS 'SLICK' WITH APPROX 1 1/2 INCHES OF SNOW ON THE RWY. BRAKING ACTION WAS POOR TO NIL. THE RWY ENVIRONMENT WAS VERY DARK WITH ONLY RWY EDGE LIGHTS VISIBLE. AFTER OUR ARR, WINDS WERE RPTED AS 290 DEGS AT 19 KTS AT XC05.

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.

An air carrier B737 flight crew had a runway excursion when they landed on a slick runway with a direct crosswind. The WX was, apparently, much worse than reported and the aircraft slid off the left side of the runway during its rollout then returned to centerline with no damage.