Service difficulty report · Steering Sys · Boeing 767322

Difficulty date
September 16, 2024
Submitted
September 20, 2024
Operation
Air carrier
Aircraft
N666UA
Make and model
Boeing 767322
Aircraft serial
29238
Aircraft time
87,894 hours, 18,815 cycles
Part
Steering Sys
Part number
3790037108
Part serial
00580
Condition
Faulty
Location
Nlg
Part time
728,204 hours, 703,954 cycles
Stage of operation
TX
How discovered
C
Nature of condition
O
Precautionary procedure
O

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

What was found

NOSE WHEEL STEERING SYSTEM AIRPLANE PULLS DURING TAXI AC PULLS L ON TAXI. COMPLETION OF A RIGHT TURN UPPER TORTION LINK RETURNS TO THE NEUTRAL POSITION. ON COMPLETION OF A LEFT TURN UPPER TORTION TENSIONS ON CABLES NWS1A, NWS1B, NWS2A, AND NWS2B ARE IN TOLERANCE PARTS USED:1119186,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1119186 SN OFF 6666 IPC REFERENCE #32-51-04 NLG NWS METERING VALVE MODULE INSTALLATION VERIFIED AMM 32-51-04-404-013. AND TILLER HANDLE STEERING TEST SATISFACTORY. ADJUSTMENT OF NWS STEERING SYSTEM CHECKED AMM 32-51-00-835-001. ALL RIG PINS CONFIRMED REMOVED. NLG STEERING METERING MODULE VALVE REPLACED AS PER AMM VERIFIED IPC 32-51-04-01A. 32-51-04/401. LEAK CHECK CARRIED OUT OK. CHECK OF ADJUSTMENT OF THE NOSE WHEEL STEERING SYSTEM ACTIONED AS PER AMM 32-51-00-835-001.ALL RIG PINS FIT IN RIG PIN HOLES AND VALVE, NLG, STE OFF 76-3252-9-0001 0580 ON 0273 UPON FURTHER INVESTIGATION FOUND STEERING COMPENSATOR WORN REQUIRES REPLACEMENT. REF LP 9293396 FOR COMPENSATOR REPLACEMENT. ALSO FOUND CABLE SYSTEM OUT OF ADJUSTMENT REQUIRES ADJUSTMENT. CARREIED OUT ADJUSTMENT OF NOSE WHEEL STEERING SYSTEM. IAW AMM PARTS USED: 00-0583-3-2585,QTY :1 00-0597-3-0941,QTY :1 32-51-00-835-001.FOUND SATISFACTORY ALL RIG PINS REMOVED. CARRIED OUT SYSTEM TEST OF NOSE WHEEL STEERING SYSTEM. IAW AMM 32-51-00-735-072. FOUND SATISFACTORY ALL RIG PINS REMOVED. VERIFIED SYS TEST & ADJUST OF NOSE WHEEL STEERING SYS IAW AMM 32-51-00