B757-200 requires deicing due to spray from fire trucks.

Attributes
ACN	574852
Time
Date	200302
Day	Sun
Place
Locale Reference	airport : slc.airport
State Reference	UT
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	ground : parked
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 225 flight time total : 17000 flight time type : 3355
ASRS Report	574852
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : less severe ground encounters other other anomaly other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	other
Supplementary
Problem Areas	Flight Crew Human Performance Weather Aircraft Airport Environmental Factor
Primary Problem	Weather

Narrative:

We had just flown into slc. Our departure WX was sunny skies. Nothing to cause any icing on an aircraft. At our departure gate, we met the first officer coming off the inbound flight. He commented that the captain might be a little slow getting off the aircraft. He was saying good-bye to everyone because it was his 'retirement flight.' the exterior walkaround inspection was normal -- nothing unusual noticed. Just prior to pushback, we received the fuel slip. The only thing unusual about it was the aircraft came into slc with almost full wing fuel tanks. Just after pushback, a flight attendant informed us there could be ice on top of the wings I sent my first officer back into the cabin to check, and surprisingly, we did have patches of ice on top of the wings (not visible from the ground). We called for deicing, deiced the aircraft, and departed for ord. The remainder of the flight was uneventful. It was a cool day (43 degrees F). Water had been sprayed on the aircraft by fire trucks as it taxied inbound to slc (a salute to the previous captain's retirement), and the wing fuel tanks were almost full from the previous flight (with super-cooled fuel next to the skin). All 3 of these events had to occur simultaneously for icing to even form. The last 2 events were very unusual. With the WX conditions we had, one would not expect any aircraft icing, but add in the other unusual conditions and icing can (and did) occur.

Original NASA ASRS Text

Title: B757-200 REQUIRES DEICING DUE TO SPRAY FROM FIRE TRUCKS.

Narrative: WE HAD JUST FLOWN INTO SLC. OUR DEP WX WAS SUNNY SKIES. NOTHING TO CAUSE ANY ICING ON AN ACFT. AT OUR DEP GATE, WE MET THE FO COMING OFF THE INBOUND FLT. HE COMMENTED THAT THE CAPT MIGHT BE A LITTLE SLOW GETTING OFF THE ACFT. HE WAS SAYING GOOD-BYE TO EVERYONE BECAUSE IT WAS HIS 'RETIREMENT FLT.' THE EXTERIOR WALKAROUND INSPECTION WAS NORMAL -- NOTHING UNUSUAL NOTICED. JUST PRIOR TO PUSHBACK, WE RECEIVED THE FUEL SLIP. THE ONLY THING UNUSUAL ABOUT IT WAS THE ACFT CAME INTO SLC WITH ALMOST FULL WING FUEL TANKS. JUST AFTER PUSHBACK, A FLT ATTENDANT INFORMED US THERE COULD BE ICE ON TOP OF THE WINGS I SENT MY FO BACK INTO THE CABIN TO CHK, AND SURPRISINGLY, WE DID HAVE PATCHES OF ICE ON TOP OF THE WINGS (NOT VISIBLE FROM THE GND). WE CALLED FOR DEICING, DEICED THE ACFT, AND DEPARTED FOR ORD. THE REMAINDER OF THE FLT WAS UNEVENTFUL. IT WAS A COOL DAY (43 DEGS F). WATER HAD BEEN SPRAYED ON THE ACFT BY FIRE TRUCKS AS IT TAXIED INBOUND TO SLC (A SALUTE TO THE PREVIOUS CAPT'S RETIREMENT), AND THE WING FUEL TANKS WERE ALMOST FULL FROM THE PREVIOUS FLT (WITH SUPER-COOLED FUEL NEXT TO THE SKIN). ALL 3 OF THESE EVENTS HAD TO OCCUR SIMULTANEOUSLY FOR ICING TO EVEN FORM. THE LAST 2 EVENTS WERE VERY UNUSUAL. WITH THE WX CONDITIONS WE HAD, ONE WOULD NOT EXPECT ANY ACFT ICING, BUT ADD IN THE OTHER UNUSUAL CONDITIONS AND ICING CAN (AND DID) OCCUR.

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.