Narrative:

The aircraft was a B737-300 with 128 passenger. Prior to pushback for departure, the anti-skid inoperative light illuminated when the parking brake was set. Since the anti-skid system is used to set the parking brakes, I figured there was a problem with a sensor for the anti-skid light. The system was working properly with the brake released. I wrote up the anti- skid light in the aircraft logbook. Maintenance checked the system and MEL'ed the anti-skid light using the anti-skid system MEL. I checked the penalty for takeoff and discovered we were not able to takeoff with inoperative anti-skid. However, since the system was working, this did not apply. I asked the mechanic if he MEL'ed the light. Also, I read the sign off as an inoperative light. In the rush to get out on time, I made two mistakes. One was not reading the MEL more thoroughly. Second, was that I forgot to get an amended release with the MEL. In the air I received a message to contact dispatch. In the discussion, I was informed that the MEL is on the entire system and the light could not be separated as an inoperative. The system worked, but not the light with parking brakes set. Another interesting item is that the light worked properly with the parking brakes set in clt.

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Original NASA ASRS Text

Title: FLC OF AN ACR ACFT INADVERTENTLY OPERATED THE ACFT WHEN THE ANTI-SKID WAS MEL'ED INOP WHICH REQUIRES GNDING OF THE ACFT.

Narrative: THE ACFT WAS A B737-300 WITH 128 PAX. PRIOR TO PUSHBACK FOR DEP, THE ANTI-SKID INOP LIGHT ILLUMINATED WHEN THE PARKING BRAKE WAS SET. SINCE THE ANTI-SKID SYS IS USED TO SET THE PARKING BRAKES, I FIGURED THERE WAS A PROB WITH A SENSOR FOR THE ANTI-SKID LIGHT. THE SYS WAS WORKING PROPERLY WITH THE BRAKE RELEASED. I WROTE UP THE ANTI- SKID LIGHT IN THE ACFT LOGBOOK. MAINT CHKED THE SYS AND MEL'ED THE ANTI-SKID LIGHT USING THE ANTI-SKID SYS MEL. I CHKED THE PENALTY FOR TKOF AND DISCOVERED WE WERE NOT ABLE TO TKOF WITH INOP ANTI-SKID. HOWEVER, SINCE THE SYS WAS WORKING, THIS DID NOT APPLY. I ASKED THE MECH IF HE MEL'ED THE LIGHT. ALSO, I READ THE SIGN OFF AS AN INOP LIGHT. IN THE RUSH TO GET OUT ON TIME, I MADE TWO MISTAKES. ONE WAS NOT READING THE MEL MORE THOROUGHLY. SECOND, WAS THAT I FORGOT TO GET AN AMENDED RELEASE WITH THE MEL. IN THE AIR I RECEIVED A MESSAGE TO CONTACT DISPATCH. IN THE DISCUSSION, I WAS INFORMED THAT THE MEL IS ON THE ENTIRE SYS AND THE LIGHT COULD NOT BE SEPARATED AS AN INOP. THE SYS WORKED, BUT NOT THE LIGHT WITH PARKING BRAKES SET. ANOTHER INTERESTING ITEM IS THAT THE LIGHT WORKED PROPERLY WITH THE PARKING BRAKES SET IN CLT.

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.