Narrative:

At XA00 we were assigned a downline to ZZZ for aircraft and told the emergency lights were left on and were dead. We left at XA50 and flew to ZZZ. When we arrived at ZZZ; I called maintenance control and he said they had been charging approximately 8 hours. I checked the lights inside and out. All were working. I was under the impression that it was an 8 hour charge (full) on the battery packs; therefore; signed off the write-up as charged batteries and flew back. I was told later that it was a 16 hour charge time; therefore; the report. I was the only one that worked on the aircraft. A fellow mechanic was also with me but I was finished with everything before he got to the aircraft.

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Original NASA ASRS Text

Title: A B737-500 WAS RPTED TO HAVE EMER LIGHTS INOP DUE TO LEFT ON OVERNIGHT. TECHNICIANS ARRIVED AND FOUND LIGHTS OPERATED OK. SIGNED OFF.

Narrative: AT XA00 WE WERE ASSIGNED A DOWNLINE TO ZZZ FOR ACFT AND TOLD THE EMER LIGHTS WERE LEFT ON AND WERE DEAD. WE LEFT AT XA50 AND FLEW TO ZZZ. WHEN WE ARRIVED AT ZZZ; I CALLED MAINT CTL AND HE SAID THEY HAD BEEN CHARGING APPROX 8 HRS. I CHKED THE LIGHTS INSIDE AND OUT. ALL WERE WORKING. I WAS UNDER THE IMPRESSION THAT IT WAS AN 8 HR CHARGE (FULL) ON THE BATTERY PACKS; THEREFORE; SIGNED OFF THE WRITE-UP AS CHARGED BATTERIES AND FLEW BACK. I WAS TOLD LATER THAT IT WAS A 16 HR CHARGE TIME; THEREFORE; THE RPT. I WAS THE ONLY ONE THAT WORKED ON THE ACFT. A FELLOW MECH WAS ALSO WITH ME BUT I WAS FINISHED WITH EVERYTHING BEFORE HE GOT TO THE ACFT.

Data retrieved from NASA's ASRS site as of January 2009 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.