Service difficulty report · Pcu · Boeing 7879

Difficulty date
April 17, 2025
Submitted
April 21, 2025
Operation
Air carrier
Aircraft
N27959
Make and model
Boeing 7879
Aircraft serial
36407
Aircraft time
45,108 hours, 4,306 cycles
Part
Pcu
Condition
Malfunctioned
Location
Nr 12 Spoiler
Stage of operation
NR
How discovered
O
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

PERFORMED ECRA 2761-01232 FOR #12 SPOILER PCU, RESISTANCE MEASURED 942 OHMS, FAILED RESISTANCE CHECK. NEED TO REPLACE #12 SPOILER PCU. REPLACE THE PCU PER AMM 27-61-08-01A-520A(-720A) THEN CONTINUE WITH ECRA STEP 6. A 30 DAY DIP MAY BE USED IF NEEDED. REMOVED AND REPLACED #12 SPOILER PCU REF. AMM-27-61-08-01A-520A,(-720A) UP TO INSTALLATION ITEM 11 STEPS C,D INSTALLATION TEST NEEDS TO BE COMPLETED. UNABLE TO VERIFY RII COMPLIANCE PRIOR TO AND DURING INSTALLATION. REQUESTED REMOVAL OF SPOILER PCU FOR RII REQUIREMENTS. REMOVED AND REINSTALLED #12 SPOILER PCU DUE TO UNVERIFIED INSPECTION UPDATE BY TECH ON PREVIOUS R/R. REF AMM 27-61-08-01A-520A-A/27-61-08-01A-720A-A. RIG/OPS CHECK GOOD. TESTS PASSED. NO MSGS. COMPLIED WITH RII PROCEDURES RII INSPECTION.

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