Service difficulty report · None · Airbus A320251N

Difficulty date
March 12, 2022
Submitted
March 21, 2022
Operation
Air carrier
Aircraft
N779AV
Make and model
Airbus A320251N
Aircraft serial
8300
Part
None
Condition
None
Stage of operation
TO
How discovered
O
Nature of condition
J
Precautionary procedure
C

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

What was found

ENG 1 CTL VALVE FAULT // IN REFERENCE TO TSM 75-33-00-810-811-A THE RESISTANCE AND INSULATION CHECK ON THE EEC A ELECTRICAL HARNESS CONECTOR P8A WAS FOUND. SOCKETS J AND -D (LOWERCASE) (BETWEEN 21 AND 39 OHMS) = 34.9 OHMS SOCKETS -V (LOWERCASE) AND -B (LOWERCASE) (BETWEEN 10 AND 18 OHMS) =16.5 OHMS SOCKETS -C (LOWERCASE AND -B (LOWERCASE) (BETWEEN 10 AND 18 OHMS) = 16.6 OHMS SOCKETS -B (LOWERCASE) AND THE GROUND (MORE THAN 10 MOHMS) = OK SOCKETS -C (LOWERCASE) AND THE GROUND (MORE THAN 10 MOHMS) = OK SOCKETS -D (LOWERCASE) AND THE GROUND (MORE THAN 10 MOHMS) = OK SOCKETS J AND THE GROUND (MORE THAN 10 MOHMS) = OK SOCKETS -V (LOWERCASE) AND THE GROUND (MORE THAN 10 MOHMS) = OK ON TBV RECEPTACLE CONNECTOR J86 THE RESISTANCE AND INSULATION WAS FOUND. PINS A AND 12 (BETWEEN 21 AND 39 OHMS) = 33.7 OHMS PINS 10 AND 11 (BETWEEN 10 AND 18 OHMS) =15.3 OHMS PINS 3 AND 11 (BETWEEN 10 AND 18 OHMS) = 15.4 OHMS PIN 3 AND THE GROUND (MORE THAN 10 MOHMS) = OK PIN 4 AND THE GROUND (MORE THAN 10 MOHMS) = OK PIN 10 AND THE GROUND (MORE THAN 10 MOHMS) = OK PIN 11 AND THE GROUND (MORE THAN 10 MOHMS) = OK PIN 12 AND THE GROUND (MORE THAN 10 MOHMS) = OK AND ALSO THE RESISTANCE BETWEEN TBV-P86 TO P8A CONNECTOR ON ECC CH A J TO 4 = 0.7 OHMS -D (LOWERCASE) TO 12 = 0.7 OHMS -V (LOWERCASE) TO 10 = 0.7 OHMS -B (LOWERCASE) TO 11 = 0.8 OHMS -C (LOWERCASE) TO 3 = 0.7 OHMS BETWEEN TBV J86 TO J812 CROSSLINK FROM HJ8A TO HJ8B EEC CH B 17 TO 6 = 0.7 OHMS 18 TO 7 = 0.7 OHMS 21 TO 2 = 0.7 OHMS 22 TO 8 = 0.8 OHMS 23 TO 9 = 0.8 OHMS // IAW TSM 75-33-00-810-807-A WAS REPLACED SPLIT CONTROL UNIT AND SERVO VALVE ASSY (SCU/SVA) FIN 4186KS IAW AMM 73-21-10-000-802-A / 73-21-10-400-802-A REV 59 . TORQUE APPLIED: SCU SUPPORT BRACKETS BOLTS: 120 LBF. IN , VBV-VSV FUEL MANIFOLD BOLTS : 120 LBF. IN , MTC ACC FUEL MANIFOLD BOLTS. 120 LBF. IN , SUPPLY HOSE B-NUT 32 : 530 LBF. IN , MAIN SUPPLY HOSE B NUT 16: 1000 LBF. IN , SECONDARY SUPPLY HOSE B-NUT : 730 LBF.

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