Service difficulty report · Web · Boeing 7377H4

Difficulty date
May 31, 2023
Submitted
July 5, 2023
Operation
Air carrier
Aircraft
N962WN
Make and model
Boeing 7377H4
Aircraft serial
36963
Aircraft time
38,452 hours, 23,554 cycles
Part
Web
Part number
UNKNOWN
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

SUB THRESHOLD IS CORRODED AT BS 847-787+11; RBL 26; WL 162<[01] VERIFIED APPLICABILITY PER REF SRM 53-60-15-0I-1 AND SRM 53-60-15-1A-1 <BR><BR>REMOVED CORROSION ON SUB THRESHOLD AT BS 847-787+11; RBL 26; WL 162 L=1 W=1 . ORIGINAL MATERIAL THICKNESS IS .050'' AND THE REMAINING THICKNESS IS .035'' THEREFORE FOUND TO BE 0OUT OF LIMITS PER REF SRM 53-60-15-1A-1;[02] TOOLING USED <BR><BR>ID: ATS400<BR>DUE DATE:09/2023;[03] VERIFIED CORRECTIVE ACTION #1; OUT OF LIMITS;[04] REMOVED ON ACB SUB THRESHOLD WEB AT BS 794.37 TO BS 847 RBL 26 WL 162 IAW SRM 51-40-02;[05] RECEIVED NEW SUB-THRESHOLD WEB AT BS 794.37 TO BS 847 RBL 26 WL 162 P/N146A8123-25. LOCATED AND DRILLED IAW SRM 51-40-05 AND DWG 146A8340<BR>OK TO APPLY ENAMEL;;[14] INSTALLED SUB-THRESHOLD WEB AT BS794.37 TO BS 847 RBL26 WL 162 IAW SRM 51-40-02 AND DWG 146A8340;[15] REJECTION TO ITEM 14: FOD IN THE AREA; INSIDE LIGHTENING HOLES;[16] CLEANED ON AREA FOR FOD ;INSIDE LIGHTENING HOLES IAW AMM 25-52-00-100-801;[17] VERIFIED CORRECTIVE ACTIONS 14 AND 16.<BR>TASK COMPLETE.

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