Service difficulty report · Support · Boeing 7377H4

Difficulty date
April 25, 2023
Submitted
May 25, 2023
Operation
Air carrier
Aircraft
N959WN
Make and model
Boeing 7377H4
Aircraft serial
36674
Aircraft time
38,285 hours, 23,370 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

CORROSION ON AFT CARGO BAY AFT LOWER BULKHEAD SUPPORT AT BS 947 LBL 9-RBL 19 WL 178.<[01] REMOVED ON AFT CARGO BAY AFT LOWER BULKHEAD SUPPORT AT BS 947 LBL 9 - RBL 9 WL 178 IWA SRM 51-40-02-0G-0;[02] THIS PART DOES NOT HAVE ENTRY ON THE LOWER ALLOWABLE DAMAGE LIMITS THERE FOR IT HAS TO BE REPAIRED BY REPLACEMENT PER SRM 51-10-02 STEP 9;[03] CORRECTED MEASUREMENT TABLE;[04] VERIFIED CORRECTIVE ACTION 1-3 AND MEASUREMENT TABLE;[05] LOCATED AND DRILLED NEW AFT LOWER BULKHEAD SUPPORT IAW SRM 51-40-02-0G-0 AND DWG 149A8118; OK TO INSTALL;[06] VERIFIED CORRECTIVE ACTION 5.;[07] INSTALLED 50 % FATTENERS ON NEW AFT LOWER BULKHEAD SUPPORT IAW SRM 51-40-02-OG-0 AND DWG 149A8117;[08] INSTALLED NEW AFT CARGO BAY AFT LOWER BULKHEAD SUPPORT AT BS 947 LBL 9 TO RBL 19 WL 178 IAW SRM 51-40-02-0G-0 AND DWG 149A8117 - 147A7500; CARD IS COMPLETED;[09] VERIFIED CORRECTIVE ACTION 8.

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