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 AT STA 277+5 TO 277+15; LBL 12; WL 208. / [01] CORROSION ON INTERCOSTAL AT STA 277+5 TO 277+15; LBL 12; WL 208 P/N 141A5650-3 AREA OT= 0.070''; RT=0.055'';X=0.015'';L=1.800'' 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] VERIFIED CORRECTIVE ACTION ITEM 1.;[03] REMOVED INTERCOSTAL FROM BS 277 TO BS 294.4; LBL 12; WL 208 IAW SRM 51-40-02;[04] LOCATED AND DRILLED NEW INTERCOSTAL FROM BS 277 TO BS 294.5 LBL 12; PN#141A5650-3 IAW SRM 51-40-05 AND PER DWG#141A5600.. OK TO INSTALL;[05] INSPECTED ACTION 4; VERIFIED MEASUREMENT TABLE. OK TO INSTAL;[06] INSTALLED INTERCOSTAL FROM BS 277 TO BS 294.5 LBL 12; PN#141A5650-3 IAW SRM 51-40-02 AND PER DWG#141A5600.;[07] INSPECTED ACTION 6;[08] INSPECTION COMPLETE

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