Narrative:

[We were] dispatched with engine generator inoperative for an oceanic flight. During the return flight the APU died. We accomplished the QRH: APU failure checklist. The restart attempt was unsuccessful. We then completed the QRH: left/right-APU generator failure checklist and declared an emergency with center. We established a phone patch with the dispatcher and made a joint decision to divert. The event occurred because we were dispatched with a generator inoperative rather than making the repair (as is often the case) and a resulting failure of the APU. It is too easy and expedient (legal) for the company to send us out over the ocean without backup systems.

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Original NASA ASRS Text

Title: B767 Captain reports being dispatched on over water flight with an engine driven generator inoperative and the APU generator serving as the second power source. Enroute the APU fails requiring a diversion.

Narrative: [We were] dispatched with engine generator inoperative for an oceanic flight. During the return flight the APU died. We accomplished the QRH: APU FAILURE checklist. The restart attempt was unsuccessful. We then completed the QRH: LEFT/RIGHT-APU GENERATOR FAILURE checklist and declared an emergency with Center. We established a phone patch with the Dispatcher and made a joint decision to divert. The event occurred because we were dispatched with a generator inoperative rather than making the repair (as is often the case) and a resulting failure of the APU. It is too easy and expedient (legal) for the company to send us out over the ocean without backup systems.

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.