Service difficulty report · Feeder Cable · Boeing 777224

Difficulty date
October 24, 2024
Submitted
October 28, 2024
Operation
Air carrier
Aircraft
N78001
Make and model
Boeing 777224
Aircraft serial
27577
Aircraft time
119,718 hours, 12,472 cycles
Part
Feeder Cable
Condition
Arced
Location
Zone 100
Stage of operation
CR
How discovered
O
Nature of condition
B, H
Precautionary procedure
O

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

What was found

ELEC GEN SYS R EICAS STATUS IDG HAS DISCONNECTED OR A PROTECTIVE TRIP OF THE GENERATOR CONTR OL BREAKER HAS OCCURRED OR A PROTECTIVE TRIP OF THE BTB HAS OCCU RRED. FIM TASK REF : FIM TASK REFERENCE NOT FOUND CMC MSG# 2431662 FLIGHT STATUS: L INTERMITTENCE CODE: M PH: CRUISE.NARRATIVE: GENERATOR CONTROL UNIT AND DETAIL UPDATE. WIRE IDENTS TO FOLLOW FIM 24-21-00-810-812 FOLLOWED AND C/O INSP OF FEEDER CABLES BEFORE ENG RUN T/SHOOTING. FOUND ARCING DMG TO WIRE W8200-0003-02 APPROX 1/4"DIA AND 30% THROUGH INTO CONDUCTOR. 15" AIRFRAME SIDE OF TERMINAL BLOCK TS33001, TERMINAL 3. CAUSED BY P-CLIP IPC 24-11-19-04 SHT4, ITM 290 ADDITIONAL DMG FOUND TO SAME WIRE APPROX 2" FROM TERMINAL BLOCK. DMG THROUGH INSULATION WITH NO DAMAGE TO CONDUCTOR, 0.25" LONG. OVERHEAT DMG TO RING CRIMP TERMINAL AND OUTER INSULATION DMG FOUND TO ADJOINING WIRE W8201-0003-02 APPROX 1" LONG. SEE WDM 24-21-21-1 SHT2 AND ALSO SIMILAR ECRA 2420-01507 FOR REFERENCE CARRIED OUT INTERIM REPAIR REF ECRA 2421-01172 TO T3 CABLE ASSY REF WD24-21-21-1.IDG R DEFERED INOPERATIVE REF MEL 2411A. SEE WD24-21-21-1 FOR T3 CABLE ASSY.DAMAGED CLIP SEE IPC 24-11-19 -04 ITEM 290.ADDITIONAL DMG FOUND TO SAME WIRE APPROX 2" FROM TERMINAL BLOCK. DMG THROUGH INSULATION WITH NO DAMAGE TO CONDUCT OR 0.25"LONG ADDRESED BY SWPM 20-10-13. EC 2421-01172, #2 ENG IDG FEEDER CABLE CONDUCTOR DAMAGE. ACCOMPLISHED INTERIM REPAIR. NEED TO ACCOMPTOMCQC REV PERFORMED