Service difficulty report · Shield · Boeing 73776Q

Difficulty date
April 14, 2023
Submitted
May 9, 2023
Operation
Air carrier
Aircraft
N551WN
Make and model
Boeing 73776Q
Aircraft serial
30280
Aircraft time
66,624 hours, 41,198 cycles
Part
Shield
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 ON AFT SHIELD AT FWD CARGO BAY BS500 RBL24 WL156.<[01] AFT SHIELD AT FORWARD CARGO BAY LOCATED BETWEEN BS492.4- BS500A RBL 24 WL 156 NOT HAS ENTRIES ALLOWABLE DAMAGE IN SRM. MUST BE REPAIR BY REPLACEMENT IAW SRM 51-10-02 PARAGRAPH 9.C.;[02] VERIFIED CORRECTIVE ACTION ITEM 1.<BR>CONCUR WITH APPLICABILITY OF SRM 51-10-02 PARAGRAPH 9.C.;[03] VERIFIED APPLICABILITY OF SRM 53-00-53-1A-2 ALLOWABLE DAMAGE 2 - FORWARD AND AFT CARGO COMPARTMENT FLOOR STRUCTURE;[04] LOCATED AND DRILLED NEW FCB AFT SHIELD IAW SRM 51-40-05-0G-0 AND DRAWING#143A0080.;[05] INSTALLATION OF FCB AFT SHIELD IS DOCUMENTED ON CUSTOMER CARD# 5330-E-16461-NG (CPCP/AD MOC - FWD CARGO COMPARTMENT FLOOR STRUCTURE CORROSION PROTECTION) -TTG8Q004CCXJ-;[06] UPDATED STEP 5. <BR>CUSTOMER#TTG8Q004CCXJ STEP 40;[07] UPDATE STEP 3.<BR>VERIFIED NO ENTRIES FOR FCB AFT SHIELD IAW SRM 53-00-53-1A-2 ALLOWABLE DAMAGE 2 - FORWARD AND AFT CARGO COMPARTMENT FLOOR STRUCTURE.;[08] VERIFIED CORRECTIVE ACTIONS 7; 5; AND 6;[09] VERIFIED CORRECTIVE ACTION 4

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