MD80 FO REPORTS VERY SLOW ENGINE ACCELERATION DURING TKOF AND BELIEVES BLEED VALVE MAY HAVE BEEN STUCK OPEN.

Narrative

START OF R ENG DELAYED UNTIL JUST BEFORE TKOF IN ACCORDANCE WITH FUEL-SAVING INITIATIVES. START AND IDLE OP WERE NORMAL AND CHKLISTS COMPLETED. ON THE RWY; THE R ENG FAILED TO ACCELERATE FROM IDLE WHEN THROTTLES WERE ADVANCED. THIS IS NOT AN UNCOMMON OCCURRENCE WITH THE JT8D; SO I JUST CONTINUED TO ADVANCE THE THROTTLES SLOWLY WAITING FOR A RESPONSE. AFTER 10 SECONDS; THE L ENG WAS SPOOLED AND THE R WAS STILL AT IDLE. I POINTED IT OUT TO THE CAPT AND RECOMMENDED HE ABORT THE TKOF. HOWEVER; SINCE WE HAD NOT USED ANY APPRECIABLE RWY YET; HE ELECTED TO CONTINUE. AFTER ABOUT 15 SECONDS; THE R ENG SLOWLY STARTED TO SPOOL UP. I ADVANCED THE THROTTLES THE REST OF THE WAY; AND THE TKOF WAS CONTINUED NORMALLY. THE CAPT MADE A LOGBOOK ENTRY AT THE COMPLETION OF THE FLT REGARDING THE SLOW ACCELERATION. I BELIEVE BLEED VALVES MAY HAVE BEEN STUCK OPEN ON THE R ENG AFTER START. COMBINED WITH THE LOAD OF THE R PACK; THIS INHIBITED SPOOL-UP FOR TKOF. DELAYING THE SECOND ENG START UNTIL JUST BEFORE TKOF TENDS TO RUSH COMPLETION OF CREW DUTIES; EXACERBATING THE PROB. THIS ISSUE IS COMMON ON THE JT8D AND NOT EASY TO DETECT. PRATT & WHITNEY STATES THAT THE ENGS SHOULD SPOOL TO 14 EPR WITHIN 3 SECONDS OF EACH OTHER. I THINK THE TKOF SHOULD HAVE BEEN ABORTED AND STATIC CHK OF SPOOL-UP INITIATED PRIOR TO A SECOND TKOF; BUT WE HAVE NO PROC FOR THIS; AND IT WAS NOT MY DECISION TO MAKE. I SUGGEST THAT THE OPS MANUAL BE REVISED TO INCLUDE INFO REGARDING ENG SPOOL-UP TIME ON TKOF; AND PROCS TO BE FOLLOWED WHEN IT IS ABNORMAL. I ALSO THINK WE SHOULD HAVE A REQUIREMENT FOR THE FO TO ADVANCE THE THROTTLE TO 65% N2 FOLLOWING EVERY START TO ENSURE BLEED VALVES ARE CLOSED. THIS IS A COMMON PROB; AND CAN ALSO CAUSE POST-START OVER-TEMPS.