# SDR SWAA2023041715735 - Type: Service difficulty report (as reported; unverified) - Difficulty date: March 12, 2023 - Submitted: April 17, 2023 - Operation: Air carrier - Aircraft: [N221WN](https://openairdocs.org/aircraft/N221WN), registered now - Make and model: Boeing 737-7H4 - Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs) - Aircraft serial: 34259 - Aircraft time: 58,906 hours, 34,822 cycles - System (JASC): [5315 · Fuselage Main, Floor Beam](https://openairdocs.org/jasc/5315) - Part: Beam - Condition: Corroded - Location: Zn 200 Fus Top - Stage of operation: IN - How discovered: 9 - Nature of condition: O - Precautionary procedure: K - FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/) - Page: https://openairdocs.org/sdr/SWAA2023041715735 ## Discrepancy CORROSION ON FLOOR BEAM 986.5 AT LEVEL STR 17L WL 208.1 LBL 46 AT GALLEY AREA 2023-185347<[01] INITIAL MEASURES OF CORROSION ARE L= 1.167? W=1.020? TOOL USED DIGITAL CALIPER P/N:500-197-30 S/N:A21042066 DUE DATE: 30-JUN-23.;[02] TOOL USED ULTRASONIC EQUIPMENT PN: 45MG; SN: 221861811; DUE DATE: 08 NOV 23;[03] TOOL USED: EDDY CURRENT EQUIPMENT. P/N: NORTEC 600D. S/N: 220272512. DUE DATE: 17-DEC-23.;[04] PERFORMED PERMANENT REPAIR LOCATED ON FLOOR BEAM 986.5 AT LEVEL STR 17L WL 208.1 BTW LBL 40 UP TO LBL 49 AT AFT GALLEY AREA IAW B737-700 SRM 53-70-51-2R-6 REPAIR 6. THIS REPAIR IS CATEGORY A NO FURTHER ACTIONS OR ADDITIONAL INSPECTIONS ARE REQUIRED. SEE INDIVIDUAL SIGN OFF BELOW.;[05] PERFORMED PERMANENT REPAIR LOCATED ON FLOOR BEAM 986.5 AT LEVEL STR 17L WL 208.1 BTW LBL 40 UP TO LBL 49 AT AFT GALLEY AREA IAW B737-700 SRM 53-70-51-2R-6 REPAIR 6. THIS REPAIR IS CATEGORY A NO FURTHER ACTIONS OR ADDITIONAL INSPECTIONS ARE REQUIRED. SEE INDIVIDUAL SIGN OFF BELOW.
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