FLC OF AN LGT ACR ACFT INADVERTENTLY STARTED 1 ENG DURING DEICING PROC.

Narrative

AFTER PUSHBACK FOR DEICING; THE GND CREW SPOKE TO ME (FO) THAT THEY HAD 2 HEADSETS AND THAT THE OTHER ONE WAS BROKEN AND THIS ONE DID NOT WORK. IT WAS SNOWING. THE ACFT DID OVERNIGHT IN BOS. IT DID SNOW ALL NIGHT; 6-12 INCHES. WITH THE PUSHBACK CREW DEPARTING; THE CAPT WAS NOW FACED WITH HAVING TO COORDINATE THE DEICING WITH OPS. THE DEICING TRUCK DEPARTED AND WE COULDN'T HEAR OR SEE ANY FURTHER DEICING; SO THE CAPT CALLED OPS TO GET THE REQUIRED LOGBOOK INFO TO GET RELEASED FROM THE DEP STATION. WE WERE VERY CLOSE TO THE HELI LNDG AREA. IN FACT; THERE WAS A HELI LNDG AT THAT TIME LIFTING A LOT OF SNOW. WE WERE PRETTY DISTANT FROM THE GATE AREA. WE CANNOT RECALL THE EXACT EXCHANGE; BUT EITHER WAS; OR THOUGHT THE CAPT AND I WERE NOT AWARE THAT ANOTHER TRUCK HAD COMMENCED OPS ON THE TAIL AND THAT DEICING WAS IN FACT NOT COMPLETED. THE CAPT STARTED #1 ENG AND THEN IMMEDIATELY SHUT IT DOWN WHEN WE REALIZED THE FACTS. THE SIT WAS VERY CONFUSING; LACK OF PERSONNEL; NOT ENOUGH HEADSETS; NO SITUATIONAL AWARENESS FROM OPS; GND; LACK OF COM BTWN THE RAMP; THE COCKPIT; AND OPS.