Service difficulty report · Support · Boeing 7378H4

Difficulty date
December 11, 2023
Submitted
January 10, 2024
Operation
Air carrier
Aircraft
N8557Q
Make and model
Boeing 7378H4
Aircraft serial
63582
Aircraft time
20,011 hours, 10,087 cycles
Part
Support
Part number
UNKNOWN
Condition
Corroded
Location
Zn 100 Fus Lower
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

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

What was found

CORROSION FWD CARGO BAY AFT LOWER BULKHEAD SUPPORT HAS MULTIPLE AREAS AROUND FASTENER HOLES BS500I LBL21 TO RBL21<[01] CORROSION ON FWD CARGO BAY AFT LOWER BULKHEAD SUPPORT BS500I LBL21 TO RBL21 FOUND TO BE OUT OF LIMITS. REMOVED; REPLACED AND INSTALLED NEW LOWER BULKHEAD SUPPORT AT BS 500I PER SRM 53-30-08-1A-1; SRM 51-40-02-0G-0 AND DWG 143A7902.;[02] VERIFIED CORRECTIVE ACTION #1

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