# SDR SWAA2023021088591

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 5, 2023
- Submitted: February 10, 2023
- Operation: Air carrier
- Aircraft: [N7748A](https://openairdocs.org/aircraft/N7748A), registered now
- Make and model: Boeing 737-7BD
- Registry model: [Boeing 737-7BD](https://openairdocs.org/model/boeing-737-7bd) (OpenAirDocs)
- Aircraft serial: 36399
- Aircraft time: 49,386 hours, 25,198 cycles
- System (JASC): [5313 · Fuselage Main, Longeron/Stringer](https://openairdocs.org/jasc/5313)
- Part: Stringer
- Condition: Corroded
- Location: Zn 100 Fus Lower
- 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/SWAA2023021088591

## Discrepancy

CORROSION STRINGER 25L LOCATED BS 540 WL 157.5 AT FWD CARGO COMPARTMENT 2022-708652<[01] TOOL USED: ULTRASONIC THICKNESS GAGE; P/N: 45MG; S/N: 221861811;CAL DUE DATE: 08-NOV-23;[02] TOOL USED CALIPER P/N:700-113-10; S/N:0026697; DUE DATE:30-NOV-23;[03] TOOL USED PN NORTEC 500D SN N500X1693P030456 DUE DATE 26-JAN-23;[04] TOOLS USED: TEMPERATURE CONTROLLER: P/N: P3015GOES00000; S/N: 112031023; DUE DATE: 01-FEB-23; TEMPERATURE CONTROLLER: P/N: P3015GOES00000; S/N: 112820025; DUE DATE: 01-FEB-23.;[05] PERFORMED PERMANENT REPAIR BTW BS500D AND BS540 ON STRINGER25L AT FWD CARGO COMPARTMENT IAW B737-700 SRM 53-00-03-2R-1<BR>SEE INDIVIDUAL SIGN-OFF BELOW;[06] PERFORMED PERMANENT REPAIR BTW BS500D AND BS540 ON STRINGER25L AT FWD CARGO COMPARTMENT IAW B737-700 SRM 53-00-03-2R-1 <BR>SEE INDIVIDUAL SIGN-OFF BELOW RII

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