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 268.25+5; LBL 10; WL 208. / [01] VERIFIED THE APPLICABILITY OF SRM 53-10-51-0I-2 AND SRM 53-10-51-1A-1;[02] REMOVED CORROSION ON INTERCOSTAL AT STA 268.25 +5 ; LBL 10 ; WL 208 IAW SRM 51-10-02 ; ORIGINAL THICKNESS IS 0.080' MAXIMUM MATERIAL REMOVED 2.0'X2.0'X0.015' REMAINING THICKNESS IS 0.065' ; FOUND TO BE OUT OF LIMITS IAW SRM 53-10-51-0I-2 AND SRM 53-10-51-1A-1 ;. MEASURING TOOL USED ID : ATS2678 ; S/N UNKNOWN ; DUE DATE 04/2023;[03] REMOVED INTERCOSTAL AT STA 268.25+5; LBL 10; WL 208 IAW SRM 51-40-02 LOCATED AND DRILLED NEW INTERCOSTAL IAW SRM 51-40-05 AND DWG # 141A5600 ; OK TO INSTALL;[04] INSPECTED ACTION 1-3; VERIFIED MEASUREMENT TABLE;[05] INSTALLED NEW INTERCOSTAL BS 268 ; LBL 10 WL 208 IAW SRM 51-40-02 AND DWG # 141A5600;[06] REJECTION TO ITEM 5 CORRECTIVE ACTIONS AT STEP 1: INCORRECT FASTENERS INSTALLED.;[07] COMPLETED ALL STEPS;[08] VERIFIED STEP 1 COMPLETE;[09] VERIFIED FAULT COMPLETE

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