Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
March 8, 2022
Submitted
March 31, 2022
Operation
Air carrier
Aircraft
N763SW
Make and model
Boeing 7377H4
Aircraft serial
27877
Aircraft time
74,817 hours, 44,183 cycles
Part
Intercostal
Part number
146A8123U4
Condition
Corroded
Location
Aft Cargo Bay
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 BS 847 TO 850 RBL 18 W/L 153 / [01] APPLICABILITY STATEMENT: ALLOWABLE DAMAGE IAW SRM 53-60-15-1A-1;[02] REMOVED WEB AT ACB BS 847 TO BS 855; RBL 18; IAW SRM 51-40-02-0G-0. REMOVED CORROSION AT WEB L-3'; W-2'; D-0.007'; FOUND OUT OF LIMITS IAW SRM 53-60-15-1A-1; PARA 4 (G);[03] USED TOOL CALIPER ID- ATS2502; S/N AT9335659; DUE 04/2022;[04] LOCATED AND DRILLED NEW WEB P/N 146A8123U4 PO # 771166; IAW SRM 5-40-05-0G-9; OK TO INSTALL;[05] VERIFIED CORRECTIVE ACTION 4.;[06] INSTALLED NEW WEB AT ACB BS 847 TO BS 855.95 RBL 18 WL 153 IAW SRM 51-40-02 AND DWG :146A0081 ID:0001 REV:B AND DWG:146A8120 ID:0001 REV:E.;[07] VERIFIED COMPLETION OF STEP 1 AND CORRECTIVE ACTION 6.

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