Service difficulty report · Tank Unit · Boeing 7673CB

Difficulty date
January 5, 2024
Submitted
January 8, 2024
Operation
Air carrier
Aircraft
N684UA
Make and model
Boeing 7673CB
Aircraft serial
33466
Aircraft time
70,927 hours, 12,501 cycles
Part
Tank Unit
Part number
201280113
Part serial
446
Condition
Intermittent
Location
Lh Wing, #8
Part time
119,353 hours, 18,507 cycles
Stage of operation
CL
How discovered
O
Nature of condition
J
Precautionary procedure
A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

LEFT FUEL QUANTITY DROPPED FROM 36.5 TO 29.7 IN APPOX 30 SECS THEN RETURNED TO 35.6 ACCOMPLISHED IDT INSPECTION OF FUEL PROBE #8 INSTALLATION, VERIFIED CDCCL''S PER GMM 09-10-05 DUE TO HISTORY OF LEFT FUEL TANK DENSITOMETER AND TANK PROBE TU8 REPEAT HITS ON THE FQIS REPLACING BOTH. PARTS USED: 99-2841-9-0009,QTY :1 99-2841-9-9004,QTY :1 LEFT WING #8 TANK UNIT TRACKING INFO ROTABLE PARTS CHANGE WAS INDICATED - TT # 1277314 SN OFF 0446 DENSITOMETER TRACKING INFO ROTABLE PARTS CHANGE WAS INDICATED - TT # 1835526 SN OFF 5250 INSTALLED LEFT TANK UNIT 8 REF AMM 28-41-01-404-017-002 ADD EMP:U138004 UNIT, TANK, FQI OFF 99-2841-9-9004 0446 ON 99-2841-9-9004 4738 UNIT, TANK, FQI OFF 99-2841-9-9004 0446 ON 0000 DENSITOMETER, F OFF 99-2841-9-0009 5250 ON 99-2841-9-0009 8008 DENSITOMETER, F OFF 99-2841-9-0009 5250 ON 0000 INSTALLED DESITOMETER REF AMM 28-41-03-404-014-002. COMPLEATED FUEL QUANTITY INDICATING SYSTEM OPERATION TEST REF AMM28-41-00-715-001-002, TESTED GOOD. ADD EMP:U101111.

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