A B737-300 was dispatched with #1 main fuel quantity system and center tank fuel quantity system inoperative and deferred.
Synopsis
A B737-300 was dispatched with #1 main fuel quantity system and center tank fuel quantity system inoperative and deferred.
Narrative
Rewritten in plain English from NASA’s original all-caps telegraphic report — facts, figures, and terminology preserved.
In sum: As a System Aircraft Maintenance Controller, the reporter authorized the MEL deferral of the #1 main fuel quantity indicator. Later, the deferral of the center tank fuel quantity system was authorized.
The B737-300 MEL allows both to be deferred, but under the specs for #1 fuel quantity indication, item C states the center tank fuel quantity indication must operate normally. The MEL specs for the center tank fuel quantity system does not have this stated limit.
The aircraft flew to XXX where it was removed from service for repair.
Show the original NASA report (verbatim, telegraphic)
IN SUM: AS A SYS ACFT MAINT CTLR; THE RPTR AUTH THE MEL DEFERRAL OF THE #1 MAIN FUEL QUANTITY INDICATOR. LATER; THE DEFERRAL OF THE CTR TANK FUEL QUANTITY SYS WAS AUTH. THE B737-300 MEL ALLOWS BOTH TO BE DEFERRED; BUT UNDER THE SPECS FOR #1 FUEL QUANTITY INDICATION; ITEM C STATES THE CTR TANK FUEL QUANTITY INDICATION MUST OPERATE NORMALLY. THE MEL SPECS FOR THE CTR TANK FUEL QUANTITY SYS DOES NOT HAVE THIS STATED LIMIT. THE ACFT FLEW TO XXX WHERE IT WAS REMOVED FROM SVC FOR REPAIR.
More incidents for this aircraft family →
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.