Service difficulty report · Sidewall Support · 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
Sidewall Support
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 FLOOR TO SIDEWALL SUPPORT AT FCB BS400 - BS500D LBL23 WL156.<OUT OF LIMITS; WILL BE REPAIR BY REPLACEMENT PER SRM 51-10-02 PARAG. 9.C;[05] RECEIVED EXTRUSION P/N BAC1496-444 LOT. 1524635-1. LOCATED AND DRILLED (2EA) EXTRUSION (FORMED CHANNEL) ON FWD CARGO BAY L/H FROM BS 400 - 500D LBL23 WL 156 IAW SRM 51-40-05; SRM 53-00-53-2R-6 AND DWG'S 143A7501 REV: B. <BR>MADE (1EA;) SPLICE SIDEPLATE FROM BAC1496-444 LOT:1524635-1 LOCATED AT BS 480+10 LBL23; WL 156 IAW SRM 53-00-53-2R-6 REPAIR 6 TABLE 201 ITEM [2].<BR> APPLIED CHEMICAL CONVERSION COATING TO REPAIR PARTS IAW SRM 51-20-01. OK TO APPLY PRIMER TO REPAIR PARTS.;[06] VERIFIED APPLICABILITY OF SRM 53-00-53-2R-6 REPAIR 6 CARGO COMPARTMENT SIDEPLATE REPAIR AT A FLOOR PANEL SPLICE;[07] VERIFIED CORRECTIVE ACTIONS 4 AND 6;[08] VERIFIED CORRECTIVE ACTION 5. OK TO PRIME REPAIR PARTS.;[09] APPLIED PRIME ON NEW FLOOR TO SIDEWALL SUPPORT AND SPLICE REPAIR IAW SRM 51-20-01-0G-0.<BR>OK TO ASSEMBLY NEW SIDEWALL SUPPORT AND SPLICE REPAIR.;[10] VERIFIED CORRECTIVE ACTION 9; OK TO ASSEMBLE SIDEWALL SUPPORT AND SPLICE REPAIR;[11] NUT PLATES INSTALLED AND REPAIR SPLICE LOCATED AT BS 480+10 IAW SRM 51-40-02 AND SRM 53-00-53-2R-6 REPAIR 6 AND DWG# 143A7501 REV:B<BR>DISASSEMBLY AND INSTALLATION IS DONE BY CUSTOMER CARD NO. TTG8Q004CCXJ STEP NO. 10 & 38;[12] VERIFIED CORRECTIVE ACTION 11 AND COMPLETED ALL STEPS.;[13] VERIFIED MEASUREMENT TABLE.

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