Service difficulty report · Beam · Boeing 737*

Difficulty date
March 15, 2022
Submitted
April 20, 2022
Operation
Air carrier
Aircraft
N472WN
Make and model
Boeing 737*
Aircraft serial
33831
Aircraft time
58,559 hours, 34,804 cycles
Part
Beam
Condition
Corroded
Location
Fuselage
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 UPPER SURFACE OF B.S. 270 LATERAL BEAM AT L.B.L. 10 - R.B.L. 10; W.L 207.54. / [01] SRM 53-10-51-0I-2 FOR IDENTIFICATION AND SRM 53-10-51-1A-1 FOR ALLOWABLE DAMAGE ARE APPLICABLE;[02] REMOVED CORROSION AT DISCREPANCY AREA; L=20.' X W=.90' X D=0.020' ORIGINAL MATERIAL THICKNESS 0.050' MATERIAL REMAINING THICKNESS 0.030' FOUND TO BE OUT OF LIMITS PER SRM 53-10-51-1A-1 PARAGRAPH 4.C.(2) DETAIL C. TOOL ID:ATS1671; S/N:65093024;DATE:01/2022;DUE:10/2022;[03] VERIFIED CORRECTIVE ACTION ITEMS 1-2; MATERIAL LOSS OUT OF LIMITS PER SRM 53-10-51-1A-1.;[04] ACCOMPLISHED REPAIR ON M-21-153-00277;[05] VERIFIED CORRECTIVE ACTION 4.;[06] UPDATED CORROSION LEVEL;[07] VERIFIED TASK COMPLETE.