Narrative:

March 2010. On a B737 aircraft the #2 slat in-transit light came 'on' in-flight. In performing initial evaluation in accordance with fault isolation manual (fim); flap slat electronics unit (fseu) checked good; no faults noted. Operation of flap/slat indication checked normal. Because of previous write-up of #2 slat; I requested a placard to ensure precautionary awareness of (not failure) of the #2 slat light. After discussion with maintenance control; an MEL item number was given and was acceptable MEL for the item being placarded. A placard was installed after verified operation of slats. A few days later; I was informed that the MEL was not acceptable to B737 fleet.

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Original NASA ASRS Text

Title: A Line Mechanic deferred a repeat write-up of a B737 #2 Slat In-Transit light illuminating in-flight. Maintenance Control had approved and accepted the MEL deferral. Mechanic was informed approximately one week later the MEL was not applicable to their B737 fleet.

Narrative: March 2010. On a B737 aircraft the #2 Slat In-Transit light came 'On' in-flight. In performing initial evaluation in accordance with fault isolation manual (FIM); Flap Slat Electronics Unit (FSEU) checked good; no faults noted. Operation of flap/slat indication checked normal. Because of previous write-up of #2 slat; I requested a placard to ensure precautionary awareness of (not failure) of the #2 slat light. After discussion with Maintenance Control; an MEL item number was given and was acceptable MEL for the item being placarded. A placard was installed after verified operation of Slats. A few days later; I was informed that the MEL was not acceptable to B737 fleet.

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.