Narrative:

I had a gate call for a captain's clock that had no backgnd lighting. I replaced the captain's clock with the alternate effectivity part. I did not understand the note saying if alternate is installed it must be the same part number as the first officer's clock. The mistake was caught on the morning paperwork audit from our data entry personnel. The clock was replaced with the matching number clock at the next maintenance station; with no further discrepancies ed. Believe the note in maintenance parts directory could be more clear; in retrospect. I thought I was correct at the time of installation of the clock.

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Original NASA ASRS Text

Title: A B737-700 CAPT'S CLOCK REPLACED DUE TO BACKGND LIGHTING FAILURE. CLOCK WAS INCORRECT PART DUE TO NOT MATCHING THE FO'S PART NUMBER.

Narrative: I HAD A GATE CALL FOR A CAPT'S CLOCK THAT HAD NO BACKGND LIGHTING. I REPLACED THE CAPT'S CLOCK WITH THE ALTERNATE EFFECTIVITY PART. I DID NOT UNDERSTAND THE NOTE SAYING IF ALTERNATE IS INSTALLED IT MUST BE THE SAME PART NUMBER AS THE FO'S CLOCK. THE MISTAKE WAS CAUGHT ON THE MORNING PAPERWORK AUDIT FROM OUR DATA ENTRY PERSONNEL. THE CLOCK WAS REPLACED WITH THE MATCHING NUMBER CLOCK AT THE NEXT MAINT STATION; WITH NO FURTHER DISCREPANCIES ED. BELIEVE THE NOTE IN MAINT PARTS DIRECTORY COULD BE MORE CLR; IN RETROSPECT. I THOUGHT I WAS CORRECT AT THE TIME OF INSTALLATION OF THE CLOCK.

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.