Service difficulty report · Shear Web · Boeing 737*

Difficulty date
October 6, 2021
Submitted
November 22, 2021
Operation
Air carrier
Aircraft
N450WN
Make and model
Boeing 737*
Aircraft serial
32470
Aircraft time
58,641 hours, 34,716 cycles
Part
Shear Web
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 HORIZONTAL SHEAR WEB BS 1019-1022 RBL 4 WL 208 ; CORRECTION TO FALT DESCRIPTION: TTOCK LINE IS LBL. FALT DESCRIPTION SHOLD READ: CORROSION ON HORIZONTAL SHEAR WE BS 1019-1022 LBL 4 WL 208 / [01] CORRECTION TO FAULT DESCRIPTION: BUTTOCK LINE IS LBL. FAULT DESCRIPTION SHOULD READ: CORROSION ON HORIZONTAL SHEAR WEB BS 1019-1022 LBL 4 WL 208; [02] REMOVED CORROSION FROM HORIZONTAL SHEAR WEB BS 1019-1022 LBL 4 WL 208 IN AREA OF 0.5' BY 4.6' PER SRM 51-10-02-0G-0.; [03] VERIFIED CORRECTIVE ACTION 2.; [04] PERFORM UT INSPECTION TO DETERMINE REMAINING MATERIAL THICKNESS.; [05] UT INSPECTED BLENDED AREA IAW 737 NDTM PART 4 51-00-00 PROCEDURE 2; REMAINING THICKNESS IS 0.038' ADJACENT TO 0.04'. SEE ATTACHED GRID ON COVER SHEET<BR><BR>EQUIP ID#: ATS2031 S/N: 170515011; [06] HFEC INSPECTED IAW NDTM PART 6; 51-00-00 PROC 23. NO CRACKS FOUND. TOOL ID IS000450 N500; [07] VERIFIED ALL WORK COMPLETED; [08] COMPLETE; [09] ALL WORK STEPS COMPLETE.