Full deployment of spoilers did not occur for flight crew of DC9- 32 landing at dfw, tx.

Attributes
ACN	424566
Time
Date	199901
Day	Sun
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : dfw
State Reference	TX
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tower : mkg
Operator	common carrier : air carrier
Make Model Name	DC-9 30
Flight Phase	landing other
Route In Use	arrival other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 210 flight time total : 22000 flight time type : 14500
ASRS Report	424566
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial
Experience	flight time last 90 days : 200 flight time total : 10500 flight time type : 1700
ASRS Report	424575
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : overcame equipment problem other
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

Upon landing dfw, did not feel like ground spoilers deployed. Spoiler handle moved aft and spoiler deployed light did come on. Normal reverse and braking were used. After passenger deplaned at gate, I operated spoilers manually and visually checked ground spoiler position. Spoiler handle was stiff and only outboard spoilers came up. Operated a couple of times with same results. First officer advised that on his walkaround, he observed some snow in both wheel well areas. Called our operations center and maintenance and advised of situation. Entered discrepancy in maintenance log. Mechanics deiced wheel well area and checked all flight controls normal. Aircraft released for service. It appeared the aircraft had sat at gate in xyz during a snow storm previous to our flight from xyz to dfw. The snow was dry and there was blowing snow. Maintenance was called in xyz prior to departure of flight from xyz-dfw to inspect and remove snow from wheel well area. A mechanic confirmed that snow was light and powdery and had been brushed out of wheel well area, ok to go. Deicers also confirmed aircraft deiced and inspected before departure xyz. Ground spoilers and flight controls checked normal prior to departure xyz and operated normal during flight. Did more snow blow into wheel wells after removal and during taxi and takeoff? Did the mechanic miss snow that got blown out of a hidden area during retraction? Did some snow get in wheel well from gear and wheels during retraction? It appears that any snow, even dry snow in wheel well area of the DC9 could be a problem with all the cables and mixer assembly in the wheel wells. Supplemental information from acn 424575: during my walkaround, I observed snow packed in left wheel well near cable bus area (top inboard aft corner). There was also same area in right well packed with snow. All flight controls checked normal after deice and aircraft was released for service. Same crew flew aircraft (DC9-32) from dfw-xyz without incident.

Original NASA ASRS Text

Title: FULL DEPLOYMENT OF SPOILERS DID NOT OCCUR FOR FLC OF DC9- 32 LNDG AT DFW, TX.

Narrative: UPON LNDG DFW, DID NOT FEEL LIKE GND SPOILERS DEPLOYED. SPOILER HANDLE MOVED AFT AND SPOILER DEPLOYED LIGHT DID COME ON. NORMAL REVERSE AND BRAKING WERE USED. AFTER PAX DEPLANED AT GATE, I OPERATED SPOILERS MANUALLY AND VISUALLY CHKED GND SPOILER POS. SPOILER HANDLE WAS STIFF AND ONLY OUTBOARD SPOILERS CAME UP. OPERATED A COUPLE OF TIMES WITH SAME RESULTS. FO ADVISED THAT ON HIS WALKAROUND, HE OBSERVED SOME SNOW IN BOTH WHEEL WELL AREAS. CALLED OUR OPS CTR AND MAINT AND ADVISED OF SIT. ENTERED DISCREPANCY IN MAINT LOG. MECHS DEICED WHEEL WELL AREA AND CHKED ALL FLT CTLS NORMAL. ACFT RELEASED FOR SVC. IT APPEARED THE ACFT HAD SAT AT GATE IN XYZ DURING A SNOW STORM PREVIOUS TO OUR FLT FROM XYZ TO DFW. THE SNOW WAS DRY AND THERE WAS BLOWING SNOW. MAINT WAS CALLED IN XYZ PRIOR TO DEP OF FLT FROM XYZ-DFW TO INSPECT AND REMOVE SNOW FROM WHEEL WELL AREA. A MECH CONFIRMED THAT SNOW WAS LIGHT AND POWDERY AND HAD BEEN BRUSHED OUT OF WHEEL WELL AREA, OK TO GO. DEICERS ALSO CONFIRMED ACFT DEICED AND INSPECTED BEFORE DEP XYZ. GND SPOILERS AND FLT CTLS CHKED NORMAL PRIOR TO DEP XYZ AND OPERATED NORMAL DURING FLT. DID MORE SNOW BLOW INTO WHEEL WELLS AFTER REMOVAL AND DURING TAXI AND TKOF? DID THE MECH MISS SNOW THAT GOT BLOWN OUT OF A HIDDEN AREA DURING RETRACTION? DID SOME SNOW GET IN WHEEL WELL FROM GEAR AND WHEELS DURING RETRACTION? IT APPEARS THAT ANY SNOW, EVEN DRY SNOW IN WHEEL WELL AREA OF THE DC9 COULD BE A PROB WITH ALL THE CABLES AND MIXER ASSEMBLY IN THE WHEEL WELLS. SUPPLEMENTAL INFO FROM ACN 424575: DURING MY WALKAROUND, I OBSERVED SNOW PACKED IN L WHEEL WELL NEAR CABLE BUS AREA (TOP INBOARD AFT CORNER). THERE WAS ALSO SAME AREA IN R WELL PACKED WITH SNOW. ALL FLT CTLS CHKED NORMAL AFTER DEICE AND ACFT WAS RELEASED FOR SVC. SAME CREW FLEW ACFT (DC9-32) FROM DFW-XYZ WITHOUT INCIDENT.

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.