A B737-400 WAS DISPATCHED WITH THE #2 ENG START VALVE OPEN LIGHT ILLUMINATED. DEFERRED PER MEL BUT SPECIAL PROCS WERE NOT ACCOMPLISHED.

Narrative

DURING PUSHBACK AND ENG START AT ZZZ; AFTER ACCOMPLISHING THE ENG START AND AFTER START CHKLIST; WE NOTICED THE START VALVE OPEN LIGHT ON THE #2 ENG DID NOT GO OUT. AFTER COMPLETING THE QRH PROC FOR THIS CONDITION WE CONTACTED MAINT CTL. MAINT CTL INSTRUCTED US TO SHUT DOWN THE #2 ENG AND ATTEMPT A RE-START. AFTER RE-STARTING THE #2 ENG THE START VALVE OPEN LIGHT REMAINED ON. MAINT CTL ADVISED US THAT THIS WAS AN MEL ITEM AND THAT WE COULD ACCOMPLISH THE FLT CREW PLACARD PROC. WE WROTE THE ITEM UP IN THE LOGBOOK AND WERE TOLD TO ENTER 'RELEASED PER MEL BY COMPANY MAINT AND THE CURRENT ZULU TIME.' WE WERE ALSO GIVEN AN AMENDED RELEASE BY DISPATCH PER MEL. OUR TKOF WAS PLANNED AS A BLEEDS OFF DUE TO THE TEMP AT LAS (37C). WE CONFIGURED THE BLEEDS AND TAXIED FOR TKOF. OUR TKOF WAS NORMAL; ON CLBOUT WHEN WE RE-ESTABLISHED THE ENG BLEEDS WE HAD A ZERO DUCT PRESSURE INDICATION FROM THE #2 ENG BLEED. HAVING DISCOVERED THIS WE CONCLUDED THAT WE WOULD HAVE TO RUN BOTH PACKS FROM THE #1 ENG BLEED AND THUS ELECTED TO FLY AT A LOWER ALT (FL240) AS A PRECAUTION. WE CONTACTED DISPATCH AND THEY AGREED THAT OUR FUEL WAS SUFFICIENT FOR THE FLT. UPON OUR ARR AT ZZZ1 THE LINE TECHNICIAN THAT MET THE ACFT POINTED OUT THAT WITH THE CONDITION WE HAD THERE WAS AN ADDITIONAL MEL PROC THAT SHOULD HAVE BEEN ACCOMPLISHED BEFORE DISPATCHING WITH THE START VALVE OPEN LIGHT ON CONDITION. AT THIS TIME OUR FLT DAY HAD ENDED AND WE HANDED THE ACFT OFF TO MAINT. WE WERE COMPLETELY UNDER THE IMPRESSION THAT THE INFO WE RECEIVED FROM MAINT CTL WAS ACCURATE AND COMPLETE BEFORE DEP AND THEREFORE CONTINUED THE FLT TO ZZZ1. SUPPLEMENTAL INFO FROM ACN 705071: I RECEIVED AN ACARS FROM THE FLT STATING THAT HE WAS FLYING AT FL240 DUE UNABLE TO PRESSURIZE R PACK. I RECALCULATED HIS FLT PLAN TO FLY AT THIS LOWER ALT AND DETERMINED WITH THE EXTRA FUEL ON BOARD THAT HE COULD CONTINUE AND LAND WITH MORE THAN 5.0 LBS. A VERY LENGTHY OPS PROC THAT SAYS 'DO NOT DISPATCH INTO KNOWN OR FORECAST CONDITIONS AND FOR R ENG BLEED INOP LIMIT ALT TO FL250.