Narrative:

I accepted ship with 1 engine generator inoperative from pdx to ZZZ. When I examined the logbook, there was a write-up about a flickering APU low oil pressure light which was corrected by adding 3 quarts of oil. The airplane had come in from psp without any recurrence of the problem and the pdx mechanic checked the APU oil and no servicing was required. Since ZZZ was mostly clear, I elected to accept the airplane. About 100 mi prior to our descent point, the APU light began to flicker. The frequency and duration of the flickering increased so we made plans to land VFR at the nearest airport if the APU failed. APU was still flickering when we landed. I am submitting this report as food for thought. I will require more troubleshooting before I ever accept an airplane under similar circumstances.

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Original NASA ASRS Text

Title: A B737-700 PIC ACCEPTS HIS ACFT WITH 1 ENG GENERATOR INOP AND MEL'ED WITH A QUESTIONABLE APU FOR A NIGHT OP TO ZZZ.

Narrative: I ACCEPTED SHIP WITH 1 ENG GENERATOR INOP FROM PDX TO ZZZ. WHEN I EXAMINED THE LOGBOOK, THERE WAS A WRITE-UP ABOUT A FLICKERING APU LOW OIL PRESSURE LIGHT WHICH WAS CORRECTED BY ADDING 3 QUARTS OF OIL. THE AIRPLANE HAD COME IN FROM PSP WITHOUT ANY RECURRENCE OF THE PROB AND THE PDX MECH CHKED THE APU OIL AND NO SVCING WAS REQUIRED. SINCE ZZZ WAS MOSTLY CLR, I ELECTED TO ACCEPT THE AIRPLANE. ABOUT 100 MI PRIOR TO OUR DSCNT POINT, THE APU LIGHT BEGAN TO FLICKER. THE FREQ AND DURATION OF THE FLICKERING INCREASED SO WE MADE PLANS TO LAND VFR AT THE NEAREST ARPT IF THE APU FAILED. APU WAS STILL FLICKERING WHEN WE LANDED. I AM SUBMITTING THIS RPT AS FOOD FOR THOUGHT. I WILL REQUIRE MORE TROUBLESHOOTING BEFORE I EVER ACCEPT AN AIRPLANE UNDER SIMILAR CIRCUMSTANCES.

Data retrieved from NASA's ASRS site as of July 2007 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.