Service difficulty report · Support · Boeing 7377H4

Difficulty date
March 17, 2023
Submitted
April 24, 2023
Operation
Air carrier
Aircraft
N957WN
Make and model
Boeing 7377H4
Aircraft serial
41528
Aircraft time
38,518 hours, 23,626 cycles
Part
Support
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

AFT CARGO COMPARTMENT - CORROSION ON AFT FLOOR SUPPORT BULKHEAD AT BS 7947.5 RBL 5.5; RBL 7.25; RBL 9.75; RBL 12; LBL 1.5; LBL 9; LBL 14 WL 155 (MARKED)<[01] VERIFIED APPLICABILITY FOR SRM 51-10-02 PARAG 9.;[02] REMOVED ON ACB;AFT FLOOR SUPPORT BULKHEAD AT BS947.5;RBL20;LBL10;WL155;PART HAS NOT ALLOWABLE DAMAGE ON SRM;PART IS REPAIRABLE BY REPLACEMENT PER SRM 51-10-02 PARAG 9.;[03] CONCUR WITH APPLICABILITY OF SRM 51-10-02 PARA. 9.<BR>VERIFIED CORRECTIVE ACTION ITEM 2.<BR>VERIFIED MEASUREMENT TABLE COMPLETED.;[04] RECEIVED;LOCATED AND DRILLED NEW FLOOR SUPPORT BULKHEAD WITH P/N 149A8118-29;LOT#1519863-1;IAW DGW#149A8117 AND SRM 51-40-05.OK TO INSTALL;[05] VERIFIED CORRECTIVE ACTION ITEM 4. OKAY TO INSTALL NEW FLOOR SUPPORT BULKHEAD GIVEN.;[06] INSTALLED NEW FLOOR SUPPORT BULKHEAD ON ACB;BS947.5;IAW SRM 51-40-02 AND DWG#149A8117.;[07] REJECTION : SEE STEP 1.;[08] STEP 1 COMPLETED<BR><BR>ALL MAINTENANCE ACTIONS COMPLETED;[09] STEP 1 COMPLETE;[10] VERIFIED CORRECTIVE ACTION #6

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