Service difficulty report · Control Unit · Boeing 7878

Difficulty date
August 10, 2025
Submitted
August 12, 2025
Operation
Air carrier
Aircraft
N27903
Make and model
Boeing 7878
Aircraft serial
34823
Aircraft time
49,965 hours, 6,232 cycles
Part
Control Unit
Part number
866CE04Y11
Part serial
ZECR20217
Condition
Faulted
Location
Zone 100
Part time
31,050 hours, 3,861 cycles
Stage of operation
CR
How discovered
O
Nature of condition
S
Precautionary procedure
A

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

What was found

ELEC P200 PANEL THE PRIMARY POWER DISTRIBUTION SYSTEM (PPDS) P200 PANEL IS FAULT ED SUCH THAT IT CANNOT SUPPORT AIRPLANE DISPATCH, SUCH AS DUAL C HANNEL IN-OPERATIVE. DB 24 PDHM OPS (GPM L8) DB 24 PDHM OPS (GPM R6) TS MAINTENANCE MESSAGE 24-17484 IN REF WITH FIM, 24-30-F5-61A-421A FOUND P200M3 ELCU PROTECTION CIRCUIT CARD BAD. REMOVED AND REPLACED P200M3 ELCU PROTECTION CIRCUIT CARD IN REF WITH B787-A-24-09-04 UP TO STEP 1. D. (5). REMOVED AND REPLACED P200M3 ELCU PROTECTION CIRCUIT CARD IN REF WITH B787-A-24-09-04 FROM STEP 1. D. (5) TO COMPLETION OF INSTALLATION. OPS CHECK GOOD.

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