Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
April 9, 2023
Submitted
April 25, 2023
Operation
Air carrier
Aircraft
N957WN
Make and model
Boeing 7377H4
Aircraft serial
41528
Aircraft time
38,518 hours, 23,626 cycles
Part
Intercostal
Condition
Cracked
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

AFT CARGO BAY INTERCOSTAL IS CRACKED AT BS 947.5 RBL 20 UNDER FLOOR TO SIDEWALL SUPPORT<[01] VERIFIED APPLICABILITY FOR SRM 51-10-02 PARAG 9.REPAIRABLE BY REPLACEMENT.;[02] PRIOR TO REMOVAL;FOUND PART HAS NOT ALLOWABLE DAMAGE ON SRM;AND SO PART WILL BE REPAIRABLE BY REPLACEMENT IAW SRM 51-10-02 PARAG 9.;[03] REMOVED INTERCOSTAL DAMAGED IAW SRM 51-40-02.;[04] RECEIVED;LOCATED AND DRILLED NEW INTERCOSTAL WITH P/N 147A7500-22;LOT#1492095-10 IAW SRM 51-40-05 AND DWG#147A7500.OK TO INSTALL.;[05] VERIFIED CORRECTIVE ACTION #4 AND MEASUREMENT TABLE<BR>OK TO INSTALL GIVEN;[06] INSTALLED NEW INTERCOSTAL ON ACB;AT BS 947.5;RBL20 IAW SRM 51-40-02 AND DGW#147A7500.;[07] VERIFIED CORRECTIVE ACTION #6

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