Narrative:

Here is the scenario: high altitude airport; morning departure; VFR; aircraft has MEL item for no.2 engine high pressure valve is inoperative and secured closed. The MEL states the remaining hp must work normally; the inoperative hp valve is secured closed. During the takeoff phase; the MEL has us select the inoperative bleed to the on position and cross bleed to auto. Here is the dilemma; to depart we needed to do a bleeds off takeoff. The MEL wants us to turn the switch on; but for takeoff performance we need the bleed off - which of course is because it is wired closed. I am hoping this report will help the dispatchers and routers to add this MEL to their 'list'.

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Original NASA ASRS Text

Title: A320 First Officer believes that an MEL requirement for bleed switches to be on; conflicted with performance requirements that they be off.

Narrative: Here is the scenario: High altitude airport; morning departure; VFR; aircraft has MEL item for No.2 Engine High Pressure valve is inoperative and secured closed. The MEL states the remaining HP must work normally; the inoperative HP valve is secured closed. During the takeoff phase; the MEL has us select the inoperative bleed to the on position and cross bleed to auto. Here is the dilemma; to depart we needed to do a bleeds off takeoff. The MEL wants us to turn the switch on; but for takeoff performance we need the bleed off - which of course is because it is wired closed. I am hoping this report will help the dispatchers and routers to add this MEL to their 'list'.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.