Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
September 24, 2022
Submitted
November 9, 2022
Operation
Air carrier
Aircraft
N201LV
Make and model
Boeing 7377H4
Aircraft serial
29854
Aircraft time
59,586 hours, 35,374 cycles
Part
Intercostal
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 INTERCOSTAL UPPER FLANGE AT STA 312+2 TO 312+5; RBL 11; WL 208. / [01] ORROSION ON INTERCOSTAL UPPER FLANGE AT STA 312+2 TO 312+5; RBL 11; WL 208 P/N 141A5410-14 AREA OT= 0.080''; RT=0.068'';X=0.012'';L=2.100'' WITH DEPTH GAGE ID:ATS2473<BR>S/N:UNKNOWN<BR>DATE:08/2022<BR>DUE:08/2023<BR>FOUND TO BE OUT LIMITS I.A.W SRM 53-10-51-0L-2 FOR IDENTIFICATION AND SRM 53-10-51-1A-1 FOR ALLOWABLE DAMAGE; IT WILL BE REPAIRABLE BY REPLACEMENT I.A.W SRM 51-10-02-0G PAR 9C .;[02] REMOVED FWD CABIN INTERCOSTAL BS 312 TO BS 328 RBL 11 IAW SRM 51-40-02 ; LOCATED AND DRILLED NEW INTERCOSTAL IAW SRM 51-40-05 AND DWG # 141A5400 ; OK TO INSTALL;[03] VERIFIED APPLICABILITY OF SRM 53-30-53-01-2 FOR IDENTIFICATION AND SRM 53-30-53-1A-1 FOR ALLOWABLE LIMIT;[04] INSPECTED ACTION 1-3; VERIFIED MEASUREMENT TABLE;[05] INSTALLED NEW FWD CABIN INTERCOSTAL BS 312 TO BS 328 RBL 11 IAW SRM 51-40-02 AND DWG # 141A5400 .;[06] VERIFIED CORRECTIVE ACTION 5; VERIFIED MEASUREMENT TABLE

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