Service difficulty report · Support · Boeing 73776Q

Difficulty date
January 11, 2023
Submitted
February 16, 2023
Operation
Air carrier
Aircraft
N565WN
Make and model
Boeing 73776Q
Aircraft serial
30282
Aircraft time
56,383 hours, 37,305 cycles
Part
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 FWD CARGO BAY FLOOR TO SIDEWALL SUPPORT AT LBL 25 BS 480+13; BS 500+10; BS 500+14; BS 500+18; BS 500A+2; BS 500A+6; BS 500A+10; BS 500A+14; BS 500A+18.<[01] VERIFIED APPLICABILITY FOR ALLOWABLE DAMAGE LIMITS OF FCB FLOOR TO SIDEWALL SUPPORT LBL 25 WL 156 IAW SRM 53-00-53-1A-2 ALLOWABLE DAMAGE 2.;[02] FABRICATED LOCATED AND DRILLED REPLACEMENT FLOOR TO SIDEWALL SUPPORT USING BAC1496-444#7075T62 LOT:1501239-1 IAW SRM 51-40-05-0G-0; AND DWG 143A7501 REV: B. FABRICATED FLOOR TO SIDEWALL SUPPORT SPLICE REPAIR AT BETWEEN B/S 480 TO BS 500' USING BAC1496-444#7075T62 LOT:1501239-1 IAW SRM 53-00-53-2R-6 AND SRM 51-40-05.;[03] VERIFIED STEPS 1-9 COMPLETE.;[04] OK TO CHEMICAL CONVERSION AND PRIMER ON FABRICATED SIDEWALL SUPPORT AND PLICE;[05] VERIFIED STEP 4.;[06] APPLIED CHEMICAL CONVERSION COATING AND PRIMER<BR>ON FLOOR TO SIDEWALL SUPPORT AND SPLICE<BR>IAW SRM 51-20-01 AND SOPM 20-41-02 OK TO INSTALL SPLICE;[07] INSPECTED ACTION 6; OK TO INSTALL;[08] NEW PART WILL BE INSTALLED WITH CUSTOMER CARD # TTG8Q004B87Y;[09] VERIFIED CORRECTIVE ACTION #6 AND MEASUREMENT FIELD

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