A B737-700 CREW INDUCED A 1000 LBS FUEL IMBAL BECAUSE A FUEL BOOST PUMP PROC WAS NOT ADHERED TO.

Narrative

LATE IN THE CLB PHASE OF FLT; I INITIATED THE NEXT GENERATION CTR BOOST PUMP PROC TO USE THE APPROX 1400 LBS OF CTR TANK FUEL. MY PAST PRACTICE HAD ALWAYS BEEN TO USE THE QUICK REF STEPS AS A CHKLIST TO COMPLY WITH THE REQUIREMENTS OF THE LATEST BULLETIN REGARDING THE NEXT GENERATION CTR BOOST PUMP PROC. THIS PRACTICE HAD RESULTED IN ERROR-FREE PERFORMANCE ON MY PART IN ACCOMPLISHING THE PROC STEPS. THIS TIME; WITH THE BULLETIN IN HAND; BUT WITHOUT THE QUICK REF MEMO; I BELIEVED THAT I WOULD BE ABLE TO ACCOMPLISH THE FEW; SIMPLE STEPS WITHOUT ERROR. I FLAT MISSED OPENING THE XFEED AND WITH 1 CTR TANK BOOST PUMP ON; AND ONE OFF; I INDUCED A LATERAL IMBAL. I ALSO DIDN'T ASK THE FO TO FOLLOW ME THROUGH ON THE STEPS. I CONTINUED TO MONITOR THE CTR TANK AS IT EMPTIED AND WHEN I TURNED OFF THE REMAINING CTR TANK PUMP; AT THE FIRST WINK FROM THE LOW PRESSURE LIGHT; I REALIZED MY MISTAKE. THE AMBER 'IMBAL' MESSAGE ON THE #2 MAIN TANK FUEL GAUGE THEN ILLUMINATED AND WE WERE THEN 1000 LBS OUT OF BAL. I CALLED OUT MY OBSERVATION TO THE FO AND WITH HIM MONITORING; I IMMEDIATELY TOOK THE CORRECT STEPS TO BEGIN FUEL BALANCING. I OBSERVED THE IMBAL TO BE 80 LBS OVER THE MAX. THE MAIN TANK FUEL WAS THEN RE-BALANCED AND NO ADVERSE FLT CHARACTERISTICS WERE DETECTED. AT THE COMPLETION OF THE FLT; I CONFERRED WITH MAINT AND MADE A MAINT LOGBOOK ENTRY DOCUMENTING THE EXCEEDENCE. OVERALL; FATIGUE MAY ALSO HAVE BEEN A CONTRIBUTING FACTOR: 8 HRS OF DUTY; ON THE THIRD LEG; 6 HRS TOTAL BLOCK TIME; AND AFTER NIGHTFALL AT THE TIME OF THE EVENT. THE LESSON I LEARNED IS THAT THERE IS EVERY REASON TO ALWAYS USE EVERY TOOL THAT IS AVAILABLE TO US. I AM BACK TO USING MY QUICK REF MEMO LIKE AN ABNORMAL CHKLIST; ENSURING THAT THE FO CONFIRMS EACH OF MY ACTIONS.