FE OF AN LGT FAILED TO NOTE OUTSIDE TEMP DURING PREFLT RESULTING IN NOT USING ENG ANTI-ICE AS REQUIRED BY ACTUAL TEMP INFLT.

Narrative

WE ARRIVED AT THE ARPT IN OKC AT XA30 LCL FOR AN XB30 DEP TO TUL. THERE HAD BEEN SOME TSTMS IN THE AREA EARLIER IN THE DAY. THE ARRIVING ACFT THAT WE WERE TO TAKE TO TUL ARRIVED LATE. AS WE WAITED FOR THE ACFT TO ARRIVE; AN FAA INSPECTOR ADVISED US HE WOULD BE OBSERVING FROM OKC AND ON TO ATL. HE ASKED HOW LONG I HAD BEEN WITH MY AIRLINE AND I TOLD HIM I HAD JUST FINISHED IOE 2 WKS BEFORE. THE ACFT FINALLY ARRIVED AND WE ALL BOARDED THE ACFT. THERE WERE A COUPLE OF ITEMS IN THE LOGBOOK THAT WERE MEL'ED. ONE WAS A YAW DAMPER AND ANOTHER WAS A PAX CONVENIENCE ITEM. THE FAA INSPECTOR ASKED TO SEE THE APPLICABLE LOGS WHILE I WAS LOOKING AT THEM SO I COMPLIED AND CONTINUED WITH THE COCKPIT PREFLT ITEMS. THE INSPECTOR ASKED FOR CERTIFICATES AND COMPANY MANUALS. MEANWHILE; I CONTINUED TO TRY AND FINISH THE NECESSARY CHKS. PAX STARTED BOARDING AT THIS TIME. I EXITED THE ACFT TO COMPLETE THE EXTERIOR INSPECTION AND THE INSPECTOR FOLLOWED TO OBSERVE. HE ASKED QUESTIONS DURING THE INSPECTION CONCERNING ACFT EQUIP. WE RE-ENTERED THE COCKPIT WHERE I COMPLETED FURTHER CHKS. ONCE AGAIN HE ASKED FOR MORE MANUAL INFO. WE COMPLETED THE CHKLISTS AND PUSHED BACK LATE AND HURRIEDLY. IN OUR RUSH WE HAD NEGLECTED TO NOTE THE OUTSIDE AIR TEMP HAD DROPPED BELOW 10 DEGS C. IT WAS RPTED AS 9 DEGS C AND THE TXWYS WERE SLIGHTLY WET FROM PREVIOUS TSTMS. THIS CONDITION SHOULD HAVE REQUIRED THE USE OF ENG ANTI-ICE BUT DUE TO EXPEDITED CHKLISTS AND WHAT I PERCEIVED AS 'PRESSURE' FROM THE INSPECTOR; WE NEGLECTED TO TURN THE ENG ANTI-ICE ON. I HAD ALSO INCORRECTLY NOTED THE APPROPRIATE ENG OUT CLEAN UP ALT ON THE TKOF DATA CARD. THE APPROX FLT TIME TO TUL WAS 20 MINS AND THE FLT WAS EXTREMELY QUICK AND UNEVENTFUL. WE WERE DEBRIEFED BY THE INSPECTOR AT TUL. I BELIEVE THERE WERE SEVERAL FUNDAMENTAL CONTRIBUTIONS TO THESE ERRORS. THE WX; TIME CONSTRAINTS; AND INTERFERENCE WITH MY DUTIES BY THE FAA INSPECTOR. I FELT AS IF I WAS TAKING A CHK RIDE WHICH IN ITSELF DOES NOT BOTHER ME; BUT THE TIMING OF HIS QUESTIONS WAS INAPPROPRIATE. THAT; IN COMBINATION WITH BEING NEW; DID NOT HELP WITH AN EXPEDITED DEP. I SHOULD NOTE; THE INSPECTOR CONTINUED ON WITH US TO ATL AND NOTED NO SPECIFIC ABNORMALITIES AND EVEN STATED THAT WE WORKED VERY WELL TOGETHER AND USED GOOD CRM. SOLUTIONS; 2 THINGS: SLOW DOWN; AND I SHOULD HAVE ASKED THE FAA INSPECTOR TO KINDLY NOT INTERFERE WITH MY DUTIES.