Service difficulty report · Web · Boeing 7377H4

Difficulty date
June 10, 2021
Submitted
July 22, 2021
Operation
Air carrier
Aircraft
N418WN
Make and model
Boeing 7377H4
Aircraft serial
29823
Aircraft time
65,911 hours, 38,694 cycles
Part
Web
Condition
Corroded
Location
Threshold
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 FORWARD CARGO BAY THRESHOLD SUB WEB AT B.S. 440-494; R.B.L. 28; W.L. 154. ; / [01] VERIFIED APPLICABILITY OF SRM 53-30-15-OI-0 FOR IDENTIFICATION AND SRM 53-30-15-1A-1 FOR ALLOWABLE DAMAGE; [02] REMOVED CORROSION ON FORWARD CARGO BAY THRESHOLD SUB WEB AT BS 440-BS494; RBL28;WL154;P/N 143A8122-10; IN AREA 3''X2''X0.020''DEEP; ORIGINAL THICKNESS 0.045''; FOUND TO BE OUT OF LIMITS IAW SRM 53-30-15-1A-1; PAR.4.G(2) FIG.103 DETAIL A<BR>TOOL USED: DEPTH GAGE: ID:ATS2473; CALIPER: P/N505-675(IS000887); S/N: 05946723;[14] REMOVED AND REPLACED ON FORWARD CARGO BAY THRESHOLD SUB WEB BETWEEN BS.440 - BS.494;RBL.28;WL.154 IAW.SRM 51-10-02; DWG#143A8120.; [15] VERIFIED REMOVED AND REPLACED ON FORWARD CARGO BAY THRESHOLD SUB WEB BETWEEN BS.440 - BS.494;RBL.28;WL.154 IAW.SRM 51-10-02; DWG#143A8120.; [16] RE-VERIFIED REMOVED AND REPLACED ON FORWARD CARGO BAY THRESHOLD SUB WEB BETWEEN BS.440 - BS.494;RBL.28;WL.154 IAW.SRM 51-10-02; DWG#143A8120.; [17] CORRECTED REPAIR TYPE IN MEASUREMENTS SECTION ITEM 20

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