Service difficulty report · Angle · Boeing 7377H4

Difficulty date
July 21, 2022
Submitted
August 12, 2022
Operation
Air carrier
Aircraft
N260WN
Make and model
Boeing 7377H4
Aircraft serial
32518
Aircraft time
52,920 hours, 31,399 cycles
Part
Angle
Condition
Cracked
Location
Center Wing
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

WING CENTER SECTION REAR SPAR RT VAPOR BARRIER UPPER ATTACH ANGLE IS CRACKED; BS 663; WL 170 APPROX. / [01] FORMED 2EA. ANGLES (REPLACEMENT ANGLE & SPLICE ANGLE) MAT. USED 2024-T3 CLAD 0.063' & 0.071'. AS PER B737-7 SRM 57-10-10-2R-5. & 51-30-01.;[28] REMOVED FASTENERS AT CENTER FUEL TANK SECTION REAR SPAR R/H VAPOR BARRIER UPPER ANGLE BS 663 REF B737-700 SRM 51-40-02-0G-0CUT OUT CRACK SECTION OF UPPER ATTACH ANGLE AT CENTER FUEL TANK SECTION REAR SPAR R/H VAPOR BARRIER BS 663 AND WL 170 APPROX. REF B737-700 57-10-10-2R-5 REPAIR 5 FIGURE 202PERFORMED HFEC INSP ON CUT OUT AREA IAW B737 NDT P6 51-00-00 PROC.23; NO CRACKS TOOL USED : NORTEC 600 B/C 172389 CALDUE: 03/23. FORMED 2EA. ANGLES (REPLACEMENT ANGLE & SPLICE ANGLE) MAT. USED 2024-T3 CLAD 0.063' & 0.071'. AS PER B737-7 SRM 57-10-10-2R-5. & 51-30-01.PERFORMED HFEC INSP. ON FORMED 2EA. ANGLES (REPLACEMENT ANGLE & SPLICE ANGLE) IAW B737 NDT PART 6; 51-00-00; PROCEDURE 23. NO CRACKS NOTED TOOL: NORTEC 600 B/C: 166317 DUE: 10/20/22. INSTALLED REPAIR ANGLE AND SPLICE AT CENTER FUEL TANK SECTION REAR SPAR R/H VAPOR APPLIED CAP SEALANT AT RT VAPOR BARRIER UPPER ANGLE REPAIR FASTENER COLLARS INSIDE THE CENTER TANK; AS PER B737-7 SRM 51-80-01.BARRIER BS 663 REF B737-700 SRM 57-10-10-2R-5 REPAIR 5 FIG 202. APPLIED FILLET SEALANT AROUND THE EDGES OF THE REPAIR AS PER B737-7 SRM 51-20-05. APPLIED CIC TO THE REPAIR AREA AS PER B737-7 SRM 51-20-01.

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