Service difficulty report · Support · Boeing 7377H4

Difficulty date
June 13, 2022
Submitted
July 14, 2022
Operation
Air carrier
Aircraft
N488WN
Make and model
Boeing 7377H4
Aircraft serial
33853
Aircraft time
59,468 hours, 35,169 cycles
Part
Support
Condition
Corroded
Location
Aft Cargo
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 CARGO BAY FLOOR TO SIDEWALL SUPPORT AT LBL 21 BS 727+10; BS 727A+10; BS 727A+14; BS 727B+2; BS 727B+6; BS 727B+10; BS 727B+14; BS 727B+18; 727C+2; BS 727C+6. / [01] VERIFIED THE APPLICABILITY OF SRM 53-60-53-0I-2 AND SRM 53-00-53-1A-2;[02] UPDATED STEPS 1 - 10;[03] PARTIAL STEPS 1 - 10 <BR><BR>VERIFIED MEASUREMENTS;[04] CORRECTED MEASUREMENTS;[05] REMOVED FROM AFT CARGO BAY FLOOR TO SIDEWALL SUPPORT AT LBL 21 BS 727 TO BS 847 IAW SRM 51-40-02-0G-0.;[06] FLOOR TO SIDEWALL SUPPORT AT LBL 21 BS 727 TO BS 847 PREVIOUSLY REMOVED PER AD CARD ID: TTG8Q004FCQ8;[07] FABRICATED ON AFT CARGO BAY FLOOR TO SIDEWALL SUPPORT LBL 21 BS 727 TO BS 847 FROM ITEM BAC1496-377#7075T62 CLAD LOT# 1490497-1 IAW SRM 53-60-53-0I-2 ; SRM 51-40-05 AND DWG146A7502. FABRICATED FLOOR PANEL SPLICE AT BS 727E+10 FROM ITEM BAC1496-377#7075T62 CLAD LOT#1490497-1 IAW SRM 53-00-53-2R-6 REPAIR 6;[08] OK TREAT AND PRIMER;[09] VERIFIED CORRECTIVE ACTION 7 AND APPLICABILITY OF SRM 53-00-53-2R-6. OK TO TREAT AND PRIME;[10] APPLIED CHEMICAL CONVERSION COATING AND PRIMER ON FLOOR TO SIDEWALL SUPPORT AND FLOOR PANEL SPLICE IAW SRM 51-20-01 AND SOPM 20-41-02<BR>OK TO INSTALL FLOOR PANEL SPLICE;[11] VERIFIED CORRECTIVE ACTION 10. OK TO INSTALL SPLICE;[12] INSTALLED FLOOR PANEL SPLICE ON FLOOR TO SIDEWALL SUPPORT LBL21 BS727E IAW SRM 53-00-53-2R-6 REPAIR 6;[13] STEPS 1-10 COMPLETE<BR>VERIFIED CORRECTIVE ACTION #12 AND MEASUREMENT TABLE;[14] VERIFIED TASK COMPLETE

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