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 L/H SHEAR WEB BS 1014-1016 LBL 37-40 WL 208.<[01] SRM 53-70-51-1A-1 IS APPLICABLE ALLOWABLE DAMAGE; UPDATED TABLE;[02] REMOVED 3 EA FASTENERS IN L/H SHEAR WEB STA 1014-1016; LBL 37-40; WL 208 PER SRM 51-40-02-0G-0.;[03] REMOVED CORROSION ON L/H SHEAR WEB STA 1014-1016; LBL 37-40; WL 208 PER SRM 51-10-02-0G-0. 2EA AREAS BLENDED ARE 1.5' .800'; 1.6' BY .700'.;[04] REMOVED 4 EA FASTENERS IN L/H SHEAR WEB STA 1014-1016; LBL 37-40; WL 208 PER SRM 51-40-02-0G-0.;[05] CHANGED TO 4 EA FASTENERS REMOVED;[06] VERIFIED CORRECTIVE ACTION 1 AND 3.;[07] COMPLETED STEP 1.;[08] FOUND L/H SHEAR WEB STA 1014-1016; LBL 37-40; WL 208 TO BE OUT OF LIMITS DUE TO NO LIMITS PER SRM 53-70-51-1A-1.;[09] VERIFIED CORRECTIVE ACTION 8 AND MEASUERMENT TABLE.;[10] ACCOMPLISHED UT THICKNESS READING IAW 737 NDTM PART 4 CHAPTER 51-00-00 PROCEDURE 2. SEE ATTACHED GRID.<BR>EQUIPMENT USED: EPOCH 650 ID: ATS2342 CAL DUE: 07/2023<BR><BR>COMPLETED STEPS 2-4;[11] CHANGED REMAINING THICKNESS TO .037';[12] CHANGED REMAINING THICKNESS TO .037';[13] COMPLETED REPAIR TYPE;[14] REPAIR ACCOMPLISHED PER EA 23-152-01554.;[15] VERIFIED CORRECTIVE ACTIONS STEP 14.

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