# SDR SWAA2021060375911

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 30, 2021
- Submitted: June 3, 2021
- Operation: Air carrier
- Aircraft: N738CB
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 27870
- Aircraft time: 74,656 hours, 44,175 cycles
- System (JASC): [5313 · Fuselage Main, Longeron/Stringer](https://openairdocs.org/jasc/5313)
- Part: Stringer
- Condition: Cracked
- Location: Bs 540 S25r
- 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/SWAA2021060375911

## Discrepancy

CRACK STRINGER 25R LOCATED BS 540 FWD CARGO COMPARTMENT / REPAIRED STRINGER 25R LOCATED BS 540 FWD CARGO COMPARTMENT IAW B737-700 SRM 53-00-03-2R-1 FIGURE 206-7 STRINGER SECTION MATERIAL CONDITION 7075T6 0.036'. -2 CHANNEL; -3 CHANNEL (2EA) MATERIAL CONDITION 7075T6 0.040' AND PERFORMED HEAT TREATMENT IAW BAC 5602 AND APPLIED PROTECTIVE TREATMENT ON REPAIR AREA AND REPAIR PART IAW B737-700 SRM 51-20-01

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