Service difficulty report · Pcu · Boeing 737724

Difficulty date
October 10, 2022
Submitted
October 10, 2022
Operation
Air carrier
Aircraft
N38727
Make and model
Boeing 737724
Aircraft serial
28797
Aircraft time
73,490 hours, 25,508 cycles
Part
Pcu
Part number
NA
Condition
False Activation
Location
Na
Stage of operation
CL
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

UNCOMMANDED ROLLL LEFT AND RIGHT AT 2500FT PERFORMED DFCS FLIGHT FAULTS CHK, NO FAULTS BOTH A/B SYSTEMS. CURRENT STS- NO FAULTS FOR A/P. PEFORMED DFCS LAND VERIFY BITE I.A.W. AMM 22-11-00, "PASSED". ENGAGED & DISENGAGED A/P''S MULTI- PLE TIMES WITH NO KICKBACKS/JERKING OF AILERONS, YOKE, ETC. INSTALLED LOWER AILER PCU THRU AMM 27-11-71-400-801 UP TO STEP OKAY TO INSTALL AILERON POWER CONTROL UNIT REF. GMM 09-25-05 ATA 3. F. (8). 27. VERIFIED PART # 251A2160-2 REF. AIPC 27-11-71-06 ITEM #1. DUE TO UNCOMAMENDED ROLL NEED TO REPLACE AILERON ACTUATORS "A" & REMOVED AILERON POWER CONTROL UNIT REF AMM 27-11-71-000-801 NEED OK TO INSTALL NEW PCU. VERIFIED PART NUMBER WITH AC IPC, INSPECTED MOUNT AND HARDWEAR. INSTALLED AILERON POWER CONTROL UNIT REF AMM 27-11-71-400-801 UP PARTS INFO ONLY. REMOVED UPPER AILERON PCU REF. AMM 27-11-71-000-801 NEED OK TO INSTALL UPPER AILERON PCU "B". OK TO INSTALL. TO STEP 3. F. (8) ROTABLE PARTS CHANGE WAS INDICATED - TT # 1112441 SN OFF 0271 UNIT, POWER CON OFF 29-2711-9-0004 0271 ON 29-2711-9-0004 4396 VERIFIED UPPER AILERON POWER CONTROL UNIT WAS INSTALLED REF. AMM 27-11-71-400-801 UP TO STEPS 3 A. - 3 F. (14) INSTALLED UPPER AILERON POWER CONTROL UNIT REF. AMM 27-11-71-400-801 UP TO STEP 3 A. - 3 F. (14) ROTABLE PARTS CHANGE WAS INDICATED - TT # 1871617 SN OFF 1616 UNIT, POWER CON OFF 29-2711-9-0004 1616 ON 29-2711-9-0004 1529 PERFORMED REMAINING INSTALLATION STEPS FOR BOTH A AND B AILERON PCU''S REF AMM 27-11-71-400-801...ADJUSTMENT