Service difficulty report · Sidewall Support · Boeing 73773V

Difficulty date
July 20, 2023
Submitted
August 15, 2023
Operation
Air carrier
Aircraft
N7839A
Make and model
Boeing 73773V
Aircraft serial
30243
Aircraft time
63,332 hours, 39,016 cycles
Part
Sidewall 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 ON FLOOR TO SIDEWALL SUPPORT AT FWD CARGO BAY BS460+10; BS460+13; BS420+13; BS500C+10 LBL24 WL156.< OUT OF LIMITS; WILL BE REPAIR BY REPLACEMENT PER SRM 51-10-02 PARAG. 9.C;[06] 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 LBL24 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 LBL24; WL 156 IAW SRM 53-00-53-2R-6 REPAIR 6 TABLE 201 ITEM [2]. OK TO APPLY CHEMICAL CONVERSION COATING AND PRIMER TO REPAIR PARTS] NUT PLATES INSTALLED ON CHANNEL SIDEPLATES AND REPAIR SPLICE LOCATED AT BS480+10 IAW SRM 51-40-02 AND SRM 53-00-53-2R-6 REPAIR 6 AND DWG# 143A7501 REV:BAPPLIED BMS10-11 TYPE II WHITE ENAMEL BAC702GL ON CHANNEL SIDEPLATES AND REPAIR SPLICE;IAW SOPM 20-41-02.;[13] VERIFIED COMPLETION OF CORRECTIVE ACTIONS 12.;[14] OK TO APPLY CIC.;[15] OKAY TO APPLY CIC GIVEN.;[16] VERIFY DRY AND OK TO INSTALL LH FLOOR TO SIDEWALL SUPPORT.;[17] CORRECTIVE ACTION #16 APPLIED BMS3-35 CIC ON NEW LH FLOOR TO SIDEWALL SUPPORT IAW AMM 51-00-59-401/51-21-91-701.OK TO INSTALL NEW LH SIDEWALL SUPPORT.INSTALLED NEW FLOOR TO SIDEWALL SUPPORT AT FCB BS396 TO BS500D;LBL24;WL156;IAW SRM 51-40-02 AND DWG#143A7500 REV A.;[20] VERIFIED CORRECTIVE ACTION 19 AND MEASUREMENT TABLE COMPLETE. CARD COMPLETE.

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