# SDR SWAA2022050490244

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 31, 2022
- Submitted: May 4, 2022
- Operation: Air carrier
- Aircraft: [N427WN](https://openairdocs.org/aircraft/N427WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29831
- Aircraft time: 66,803 hours, 39,311 cycles
- System (JASC): [5313 · Fuselage Main, Longeron/Stringer](https://openairdocs.org/jasc/5313)
- Part: Stringer
- Condition: Cracked
- Location: Fwd Cargo Bay
- 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/SWAA2022050490244

## Discrepancy

CRACK STRINGER 25R BS540 AT FWD CARGO COMPARTMENT 2022-165291 / [01] TOOL USED THICKNESS GAGE: P/N: 45MG; S/N: 130060401; DUE DATE: 22-APR-22.;[02] TOOL USED PN NORTEC 500D SN N500X1693P030456 DUE DATE 26-JAN-23;[03] TOOLS USED: TEMPERATURE CONTROLLER P/N: P3015GOES00000; S/N: 142811020; DUE DATE: 02-FEB-23; TEMPERATURE CONTROLLER P/N: P3015GOES00000; S/N: 142811019; DUE DATE: 02-FEB-23.;[04] PERFORMED PERMANENT REPAIR ON STRINGER 25R BTW BS500C AND BS540 IAW B737-700 SRM 53-00-03-2R-1<BR>MATERIAL USED FOR REPAIR PARTS (STRINGER SECTION; CHANNEL AND ANGLES 2 E/A): ALUMINUM SHEETS P/N 7075-T0-0.032 P.O. 2021 238062; P/N 7075-T0-0.036 P.O. 2021 131796. TOOLS USED: CALIPER P/N 500-196-30; S/N A21029144; DUE DUATE 07-OCT-22; RADIUS GAGE P/N 14145; S/N AE-408613; DUE DATE 11-NOV-22.<BR>HEAT TREATED AND CONVERTED FROM 7075T0 TO 7075T6 IAW BAC5602; TABLE IV AND TABLE X. TOOLS USED: TEMPERATURE CONTROLLER P/N: P3015GOES00000; S/N: 142811020; DUE DATE: 02-FEB-23; TEMPERATURE CONTROLLER P/N: P3015GOES00000; S/N: 142811019; DUE DATE: 02-FEB-23. <BR>TEMPERATURE: 919 FAHRENHEIT. <BR>TIME: 35 MINUTES.<BR><BR>SEE INDIVIDUAL SIGNS-OFF BELOW;[05] CERTIFIED WORK PERFORMED RII <BR>SEE INDIVIDUAL SIGNOFFS BELOW

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