Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
March 31, 2022
Submitted
May 2, 2022
Operation
Air carrier
Aircraft
N475WN
Make and model
Boeing 7377H4
Aircraft serial
32474
Aircraft time
59,744 hours, 35,276 cycles
Part
Intercostal
Condition
Corroded
Location
Aft Cargo
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 AFT CARGO BAY INTERCOSTAL AT RBL 22 BS 867+3. / [01] VERIFIED APPLICABILITY FOR ALLOWABLE DAMAGE AND IDENTIFICATION IAW SRM 53-60-53-01-2 AND SRM 51-10-02-0G-0;[02] THREE IS NO SRM ALLOWABLE DAMAGE FOR ACB INTERCOSTAL. PART TO BE REPAIRED BY REPLACEMENT IAW SRM 51-10-02-0G-0;[03] VERIFIED CORRECTIVE ACTION 1 AND 2;[04] REMOVED DAMAGED INTERCOSTAL IAW SRM 51-40-02.<BR>RECEIVED A NEW INTERCOSTAL PN 146A7505-7 FROM STORES REF PO 864199.<BR>LOCATED AND DRILLED NEW PART IAW SRM 51-40-05 AND DWG 146A7500 REV: -<BR>OK TO INSTALL.;[05] VERIFIED CORRECTIVE ACTION ENTRY 4. OK TO INSTALL GIVEN.;[06] MEASUREMENTS;[07] INSTALLED NEW PART IAW SRM 51-40-02 AND DWG 146A7500 REV: -.<BR>TASK COMPLETE.;[08] UPDATED MEASUREMENTS;[09] VERIFIED CORRECTIVE ACTION ENTRY 7.;[10] VERIFIED CORRECTIVE ACTION ENTRY 8. CARD COMPLETE.

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