AN ACR B727 FLC DID NOT DEICE BECAUSE THEY DID NOT THINK THAT CONDITIONS REQUIRED IT; BUT AS THEY TAXIED OUT THEY LEARNED OF ICE ON THE WINGS.

Narrative

THE ACFT HAD BEEN AT THE GATE ABOUT 1 HR. THERE WAS ONE 5-10 MIN PERIOD OF TRACE PRECIP IN THE FORM OF VERY FINE SNOW. BEFORE PUSHBACK; I ASKED THE SO THE CONDITION OF THE ACFT SURFACES. HE INFORMED ME THE WINGS WERE COMPLETELY CLEAN. NO DEICE WAS REQUESTED. ON TAXI FOR TKOF; THE AFT CABIN FLT ATTENDANT CALLED THE COCKPIT. SHE STATED OUR JUMP SEAT RIDER (WHO WAS SEATED IN THE CABIN) NOTIFIED HER THERE WAS ICE ON THE UPPER WING SURFACES. I SENT THE SO TO CHK THE ENGS FROM THE AFT CABIN. HE CONFIRMED THE RPT. I RETURNED TO THE GATE FOR DEICING. I BELIEVE THIS ICE FORMED OVER THE FUEL TANK AREAS OF THE WINGS DUE TO LARGE AMOUNT OF FUEL WE HAD ON LNDG. WE ROUTINELY TANKER FUEL TO ORD. THE LEADING EDGES AND TRAILING EDGES WERE DRY. THE SO FAILED TO NOTE THE ICE ON THE TOP OF WING; WHICH MAY NOT HAVE BEEN VISIBLE WITHOUT USING A LADDER. I TRY TO LET MY CREW MEMBERS CARRY OUT THEIR DUTIES WITHOUT DOING EVERYTHING MYSELF (IN ACCORDANCE WITH PROPER CRM). SEVERAL INCIDENTS I HAVE HAD RECENTLY (MOSTLY INVOLVING MEL) HAVE CONVINCED ME THE OLDER WAYS OF THE CAPT DOING OR CHKING EVERYTHING HAS ITS MERITS.