B737-400 mechanic did not deactivate the fuel totalizer summation unit in accordance with the MEL.

Attributes
ACN	586589
Time
Date	200307
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-400
Operating Under FAR Part	Part 121
Flight Phase	ground : parked
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	586589
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	maintenance problem : non compliance with mel maintenance problem : improper maintenance non adherence : far non adherence : published procedure non adherence : company policies
Independent Detector	aircraft equipment other aircraft equipment : fuel totalizer other flight crewa other flight crewb
Resolutory Action	none taken : detected after the fact
Consequence	other other
Supplementary
Problem Areas	Company Maintenance Human Performance Aircraft
Primary Problem	Maintenance Human Performance

Narrative:

Discovered that maintenance had not performed all of MEL and had not disconnected the fuel summation unit. We had insured that we had the MEL on our release, that maintenance in ZZZ1 had put on a known quantity of fuel, form supplied and logbook was signed off properly. We had the same MEL on the same aircraft the day before and mistakenly assumed that this was the same write-up -- the fuel summation unit had been disconnected the day before. Guess we were wrong in trusting maintenance. We wrote this up in the logbook and maintenance met the aircraft in ZZZ.

Original NASA ASRS Text

Title: B737-400 MECH DID NOT DEACTIVATE THE FUEL TOTALIZER SUMMATION UNIT IN ACCORDANCE WITH THE MEL.

Narrative: DISCOVERED THAT MAINT HAD NOT PERFORMED ALL OF MEL AND HAD NOT DISCONNECTED THE FUEL SUMMATION UNIT. WE HAD INSURED THAT WE HAD THE MEL ON OUR RELEASE, THAT MAINT IN ZZZ1 HAD PUT ON A KNOWN QUANTITY OF FUEL, FORM SUPPLIED AND LOGBOOK WAS SIGNED OFF PROPERLY. WE HAD THE SAME MEL ON THE SAME ACFT THE DAY BEFORE AND MISTAKENLY ASSUMED THAT THIS WAS THE SAME WRITE-UP -- THE FUEL SUMMATION UNIT HAD BEEN DISCONNECTED THE DAY BEFORE. GUESS WE WERE WRONG IN TRUSTING MAINT. WE WROTE THIS UP IN THE LOGBOOK AND MAINT MET THE ACFT IN ZZZ.

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.