Service difficulty report · Trim System · Boeing 767322

Difficulty date
July 14, 2024
Submitted
July 18, 2024
Operation
Air carrier
Aircraft
N655UA
Make and model
Boeing 767322
Aircraft serial
25393
Aircraft time
123,050 hours, 19,149 cycles
Part
Trim System
Condition
Unknown
Location
Rudder
Stage of operation
CL
How discovered
O
Nature of condition
F
Precautionary procedure
A

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

What was found

AFTER TAKEOFF NEEDED ALMOST 8 DEGREES RIGHT RUDDER. TRIED TO ALS O USE AILERON TRIM. NO HELP DEBRIEFIED CREW, BOTH ENGINE EPR WAS SAME PASSED. TRIM TEMPERATURE COMPENSATING LINKAGE. NO DEFECTS FOUND. NO SIGNIFICANT FINDINGS AT THIS TIME. FIM: 27-09 TASK 814, AMM: 27-21-23, AMM: 27-21-19. ACP ULTRASOUND OF YAW DAMPER SUMMING LEVER SHEAR RIVETS AS INDICATED IN FIM 27-21, 809 REF NDT PT4 27-20-01. NO FINDINGS, RIVETS ARE NOT SHEARED. UPON ARRIVAL FOUND RUDDER TRIM AT APPROXIMATELY 3 DEGREES RIGHT REF LP 8612926 ACCOMP AMM 27-00-97 PARA E, ALL CHECKS GOOD, 27-21 TASK 809. BLOCK 1 ULTRASONIC TEST WAITING ON TOOLING. ACP AMM RUDDER RATIO CHANGER MECHANISM CHECK 27-21-99-206-001 NO NO SPOILER FLOAT. AILERON, SPOILERS FAIRED REF BLOCK 1 OF FIM 27-21 TASK 809 FOR ULTRASONIC INSPECTION OF PERFORMED BITE TEST OF LEFT AND RIGHT RUDDER RATIO CHANGER AND AILERON TRIM APPROX 2 DEGREES RIGHT. FURTHER TS REQUIRED VISUALLY RIVETS NOT SHEARED. CK''D GOOD TO BLOCK 36. ACP SYSTEM MOVEMENT NOTED.CK''D FUEL LOAD IS BALANCED REF 767 FUEL MANUAL. SHEAR RIVETS OF THE YAW DAMPER SUMMING LEVER. INSPECTION MODULE. BOTH MODULES OPS CHECK GOOD. NO FAULTS NOTED ON EITHER TEST PER AMM 27-21-00-735-188-001 PAR 4N & O, TEST PASSED. ACP NO MOVEMENT NOTED ON AILERON OR SPOILERS. VISUALLY CK''D INBD REQUIRED. MODULE. VISUALLY INSPECTED WIRES ON THE AILERON AND RUDDER TRIM OPERATIONAL TEST PER AMM 27-21-00-715-001-001 PAR 2 H & I TEST AILERON REF AMM 27-11-00-715-417 FIG 510.