Service difficulty report · Servo Valve · Airbus A319131

Difficulty date
June 20, 2022
Submitted
June 20, 2022
Operation
Air carrier
Aircraft
N851UA
Make and model
Airbus A319131
Aircraft serial
1664
Aircraft time
62,957 hours, 27,687 cycles
System (JASC)
3242 · Brake
Part
Servo Valve
Part number
NA
Condition
Faulty
Location
Auto Brake Sys
Stage of operation
TO
How discovered
O
Nature of condition
O
Precautionary procedure
C

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

What was found

BRAKES AUTO BRK FAULT, REPORTING BRK NORM SERVOVLV1(15GG) DISPLAYS CODE FAULT CODE 85. TOMC ORDERED 15GG AOG UNLOCKING FOR UPDATE REF TSM 32-42-00-810-805-A, COMPLETED TSM UP TO STEP 4.B. NEED TO ACP RESISTANCE CHECK. CLEANED CONNECTOR ON SERVO VALVE 15GG, RESECURED CONNECTOR, PERFORMED NORMAL BRAKING SYSTEM TEST, TEST FAILED, FAULT ''BRK NORM SERVOVLV1(15GG)TROUBLESHOOTING DATA PERFORMED WIRING CHECKS AT SERVO VALVE 15GG FOUND P/N C20XXXXXX 32-42-34. INSTALLED. PER TSM 32-42-00-810-805-A RESISTANCE CHECKS ON 15GG ROTABLE PARTS CHANGE WAS INDICATED - TT # 1095187 SN OFF 7500 PINS A-C FOUN 96.2 OHMS AND FROM PINS E-F FOUND 97.2 OHMS, BOTH WITHIN LIMITS. REMOVED AND REPLACED BSCU OPS CHECK GOOD REF AMM UNIT, BRAKE STE OFF 31-3242-9-0001 7500 ON 31-3242-9-0001 6564

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