Service difficulty report · Anti-Skid Valve · Boeing 737824

Difficulty date
December 6, 2021
Submitted
December 6, 2021
Operation
Air carrier
Aircraft
N37274
Make and model
Boeing 737824
Aircraft serial
31592
Aircraft time
63,572 hours, 21,788 cycles
Part
Anti-Skid Valve
Part number
99324990001
Part serial
8120
Condition
Inoperative
Location
#4
Stage of operation
UK
How discovered
O
Nature of condition
O
Precautionary procedure
A

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

What was found

ANTISKID INOP LIGHT LIGHT ON PERFORMED AACU BITE REF FIM 32-42-00-810-801. FOUND VLV 4 MESSAGE, RESISTANCE READING INTO ANTISKID VALVE 4 NOT WITHIN LIMITS AT 32K OHMS, LIMIT IS 180-200 OHMS REF FIM 32-42 TASK 804. REQUIRES ANTISKID VALVE 4 REPLACEMENT. ADD EMP:U348780 REMOVED AND REPLACED # 4 ANTI SKID VALVE IAW AMM 32-42-31. OPS CONTINUE. AND LEAK CHECK GOOD. PERFORMED ANTISKID VALVE OPS CHECK PER AMM ROTABLE PARTS CHANGE WAS INDICATED - TT # 1066430 SN OFF 8120 TASK 32-42-00-720-803. OPS CK GOOD. PERFORMED BITE CHECK ON AACU IPC REFERENCE # 32-42-31-02 PER FIM 32-42 TASK 801. NO FAULTS FOUND ON BITE CHECK. OK TO VALVE, ANTI-SKI OFF 99-3249-9-0001 8120 ON 99-3249-9-0001 8446