Service difficulty report · Capacitor · Boeing 747481F

Difficulty date
December 14, 2022
Submitted
December 15, 2022
Operation
Air carrier
Aircraft
N401KZ
Make and model
Boeing 747481F
Aircraft serial
34016
Aircraft time
59,762 hours, 11,752 cycles
Part
Capacitor
Condition
Blown
Stage of operation
UK
How discovered
O
Nature of condition
B
Precautionary procedure
O

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

What was found

LOUD NOISE OBSERVED FRM OVEN WHEN OPERATING IT FOLLOWED BY UNUSUAL SMELL, WHICH DISSIPATED IMMEDIATELY. UTILITY L/R OFF AS A PRECAUTION. TROUBLESHOT IN ACCORDANCE WITH FIM 21-00 TASK 810 DISCOVERED BLOWN CAPACITOR ON OVEN CONTROL UNIT SEE LOGPAGE 100121176, ITEM BLOCK 100121177 BELOW. REFERENCE WRITEUP 100121176 ABOVE, DISCOVERED BAD CAPACITOR ON OVEN CONTROL UNIT. TRANSFERRED TO DMI #100121177 IN ACCORDANCE WITH MEL 25-20-1 AND KA NEF #9 CATEGORY D DUE 4/13/22 MAINTENANCE PROCEDURES COMPLIED WITH PLACARDS INSTALLED. PULLED CIRCUITBREAKER ON GALLEY OVEN Y7PC001 FOR COMPANY CONVENIENCE. ACCOMPLISHED E-50 CONTROL #22-144 PULLED AND COLLARED GALLEY OVEN CIRCUITBREAKER APPROVED FOR CARRYOVER 100121179 MAINTENANCE PROCEDURES COMPLIED WITH, PLACARDS INSTALLED REFERENCE DMI #100121177