Service difficulty report · Plate · Boeing 7377BD

Difficulty date
March 3, 2023
Submitted
April 3, 2023
Operation
Air carrier
Aircraft
N556WN
Make and model
Boeing 7377BD
Aircraft serial
33936
Aircraft time
37,398 hours, 21,958 cycles
Part
Plate
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

MULTIPLE AREA OF CORROSION ON FWD CARGO BAY FLOOR TO SIDEWALL SUPPORT AT LBL 24 BS 500A+6-BS 500C+2.<[01] PARTIAL STEPS 1 AND 2.;[02] PARTIAL STEPS 1 AND 2; OUT OF LIMITS;[03] RECEIVED EXTRUSION P/N BAC1496-444 LOT. 1515896-1. LOCATED AND DRILLED (2EA) EXTRUSION (FORMED CHANNEL) ON FWD CARGO BAY L/H BTW BS 400 - 500D LBL25 WL 156 IAW SRM 51-40-05; SRM 53-00-53-2R-6 AND DWG'S 143A7501 REV: A & DWG 143A7500. MADE (1EA;) SPLICE SIDEPLATE FROM BAC1496-444 LOT:1506362-1 LOCATED AT BS 480+10 LBL25; 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.;[04] VERIFIED CORRECTIVE ACTION STEP 3. VERIFIED OK TO APPLY PRIMER.;[05] APPLIED PRIMER ON REPAIR PARTS IAW SOPM 20-41-02.<BR>OK TO INSTALL (1EA.) SPLICE SIDEPLATE AND BONDED NUTS PLATE.;[06] VERIFIED CORRECTIVE ACTION 5.<BR>OK TO INSTALL SPLICE;[07] INSTALLED (1EA.) SPLICE SIDEPLATE LOCATED AT BS. 480+10 LBL25; WL 156 IAW SRM 53-00-53-2R-6 TABLE 201 ITEM [2].<BR>INSTALLED BONDED NUTS PLATE IAW SOPM 20-50-12.;[08] VERIFIED CORRECTIVE ACTION #7<BR>VERIFIED MEASUREMENTS.;[09] TASK CARD COMPLETE

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