Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
August 19, 2022
Submitted
September 27, 2022
Operation
Air carrier
Aircraft
N489WN
Make and model
Boeing 7377H4
Aircraft serial
33855
Aircraft time
57,460 hours, 34,246 cycles
Part
Intercostal
Condition
Corroded
Location
Fuselage
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 INTERCOSTAL FROM STA 312 TO 328; WL 208; LBL 12. / [01] REMOVED PANEL BREAK AT STA 312 TO 328 WL 208 LBL 12 IAW SRM 51-40-02<BR><BR>REMOVED CORROSION ON PANEL BREAK BS 314 IN L=2' X W=2' X D=0.40' FROM ORIGINAL TICKNESS OF 0.80' FOUND TO BE OUT OF LIMITS.<BR><BR>REMOVED CORROSION ON PANEL BREAK BS 326 IN L=2' X W=2' X D=0.40' FROM ORIGINAL TICKNESS OF 0.80' FOUND TO BE OUT OF LIMITS IAW SRM 53-10-51-1 PAR 4F E.<BR><BR>USED TOOL :<BR>ID:LS000459 ; S/N: 67127987 ; DATE:01/2022 ; DUE: 01/2023.;[02] PANEL BREAK IT IS OUT OF LIMITS DUE TO NO LIMITS GIVEN IN THE SRM BY REPAIRED BY REPLACEMENT OF PART IAW SRM 51-10-02 PAR 9.;[03] VERIFIED CORRECTIVE ACTION #2.;[04] LOCATED AND DRILLED NEW INTERCOSTAL FROM BS 312 TO 328 WL 208 LBL 12 IAW SRM 51-4O-05-0G- 0 ; AND OK TO INTALL;[05] CERTIFY;[06] VERIFIED CORRECTIVE ACTION 4; OK TO INSTALL GIVEN.;[07] INTALLED NEW INTERCOSTAL FROM BS 312 TO 328; WL 208; LBL 12. IAW SRM 51-40-02-0G-0 AND DWG #141A5400;[08] UPDATED P/N AND PART REQUIREMENT;[09] CERTIFY;[10] UPDATED CHART;[11] CERTIFY;[12] VERIFIED CORRECTIVE ACTION 7.;[13] VERIFIED MEASUREMENT TABLE.

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