Service difficulty report · Shield · Boeing 7378H4

Difficulty date
March 10, 2026
Submitted
April 9, 2026
Operation
Air carrier
Aircraft
N8631A
Make and model
Boeing 7378H4
Aircraft serial
42385
Aircraft time
39,753 hours, 19,327 cycles
Part
Shield
Condition
Corroded
Location
Zn 100
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

FCB; AFT SHIELD BS 490 TO 500A RBL 25 HAS SEVERAL SPOTS OF CORROSION (MARKED).<[01] REPAIRED BY REPLACEMENT FCB AFT SHIELD BS 490 TO BS 500A; RBL 25 PER SRM 51-10-02 PARAGRAPH 9.C

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