Service difficulty report · Web · Boeing 7377H4

Difficulty date
May 2, 2023
Submitted
June 1, 2023
Operation
Air carrier
Aircraft
N285WN
Make and model
Boeing 7377H4
Aircraft serial
32536
Aircraft time
51,630 hours, 31,054 cycles
Part
Web
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 R/H SHEAR WEB BS 986 RBL 42-44 WL 208.<[01] SRM 53-70-51-1A-1 IS APPLICABLE ALLOWABLE DAMAGE; UPDATED TABLE;[02] REMOVED 2 EA FASTENERS IN R/H SHEAR WEB STA 986; RBL 42-44; WL 208 PER SRM 51-40-02-0G-0.;[03] REMOVED CORROSION ON R/H SHEAR WEB STA 986; RBL 42-44; WL 208 PER SRM 51-10-02-0G-0. AREA BLENDED IS 1.8' BY 1'.;[04] VERIFIED CORRECTIVE ACTIVE 1 AND 3.;[05] COMPLETED STEP 1.;[06] FOUND R/H SHEAR WEB STA 986; RBL 42-44; WL 208 TO BE OUT OF LIMITS DUE TO NO LIMITS PER SRM 53-70-51-1A-1.;[07] CHANGED REMAINING THICKNESS BLOCK.;[08] CHANGED REMAINING THICKNESS BLOCK;[09] VERIFIED CORRECTIVE ACTION 6 AND MEASUREMENT TABLE.;[10] ACCOMPLISHED UT THICKNESS MEASUREMENT IAW 737 NDTM PART 4 CHAPTER 51-00-00 PROCEDURE 2. SEE ATTACHED GRID.<BR><BR>STEPS 2-4 COMPLETED.;[11] EQUIPMENT USED FOR UT THICKNESS MEASUREMENT: EPOCH 650 ID: ATS2342 CAL DUE: 07/2023;[12] COMPLETED REPAIR TYPE;[13] 2 EA FASTENERS WERE INSTALLED ON CUSTOMER CARD# TTG8Q00KT9X5.;[14] VERIFIED STEPS 1;2;3 ;4 COMPLETE.;[15] VERIFIED ALL STEPS 1;2;3;4 COMPLETE; AND ALL CORRECTION ACTIONS CARD COMPLETE.

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