Narrative:

A330 aircraft experienced electrical circuit breaker (C/B) tripped; followed by fuel left pump #2 low pressure while in flight from ZZZZ to ZZZ. While at ZZZ; I contacted maintenance control for assistance to MEL this issue because; due to insufficient ground time; aircraft would need a two day stay to be able to comply with special far-88 (sfar-88) and troubleshooting manual (tsm) 28-21-00-810. Maintenance control in ZZZ1 has been notified [and]; as per cautionary; C/B has been collared. This is being deferred per MEL-28-40-15A [and] entered in the back of logbook; so I was given this MEL by maintenance control. I thought it was the right MEL that applied to this issue; ETOPS was cleared; aircraft left ZZZ to ZZZZ; it arrived there with no problem. But; leaving ZZZZ; I was [later] informed that it had a return to block with the wrong MEL on it. So the MEL was changed to [MEL] 28-21-01; which makes it non-extended range beyond 120 minutes. So here; what confuses me [is] how the wrong MEL was applied here in ZZZ when the outbound crew had no problems; [but] the crew in ZZZZ didn't catch this on their preflight and the maintenance controller [had] already reviewed the ETOPS and he didn't say anything about it either. The other problem I have here is why in no place in the MEL states to collar the tripped C/B.

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Original NASA ASRS Text

Title: A Line Mechanic reports he noticed an MEL deferral maintenance procedure discrepancy for their A330 aircraft where MEL 28-21-00 requires a popped wing fuel boost pump circuit breaker to be collared prior to ETOPS dispatch; to comply with SFAR-88 and troubleshooting manual (TSM) 28-21-00. However; MEL 28-40-15 does not require the same popped C/B to be collared for a non-ETOPS flight.

Narrative: A330 aircraft experienced electrical circuit breaker (C/B) tripped; followed by fuel left pump #2 low pressure while in flight from ZZZZ to ZZZ. While at ZZZ; I contacted Maintenance Control for assistance to MEL this issue because; due to insufficient ground time; aircraft would need a two day stay to be able to comply with special FAR-88 (SFAR-88) and troubleshooting manual (TSM) 28-21-00-810. Maintenance Control in ZZZ1 has been notified [and]; as per cautionary; C/B has been collared. This is being deferred per MEL-28-40-15A [and] entered in the back of logbook; so I was given this MEL by Maintenance Control. I thought it was the right MEL that applied to this issue; ETOPS was cleared; aircraft left ZZZ to ZZZZ; it arrived there with no problem. But; leaving ZZZZ; I was [later] informed that it had a return to block with the wrong MEL on it. So the MEL was changed to [MEL] 28-21-01; which makes it non-extended range beyond 120 minutes. So here; what confuses me [is] how the wrong MEL was applied here in ZZZ when the outbound crew had no problems; [but] the crew in ZZZZ didn't catch this on their preflight and the Maintenance Controller [had] already reviewed the ETOPS and he didn't say anything about it either. The other problem I have here is why in no place in the MEL states to collar the tripped C/B.

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.