# SDR SWAA2021102623820

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 28, 2021
- Submitted: October 26, 2021
- Operation: Air carrier
- Aircraft: [N263WN](https://openairdocs.org/aircraft/N263WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 32520
- Aircraft time: 46,043 hours, 27,465 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: None
- Condition: Corroded
- Location: Fusleage
- Stage of operation: UK
- 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/SWAA2021102623820

## Discrepancy

CORROSION ON UNDERSIDE OF INTERCOSTAL BELOW FLOOR SUPPORT STRAP,  AT BS 767+6; RBL 20; WL 154.   REMOVED CORROSION ON INTERCOSTAL WEB, MEASURES:L=1.900'; W=0.600'; D= 0.020'; ORIGINAL THICKNESS:0.050'; MATERIAL LOSS:0.020'; REMAINING THICKNESS:0.030'. THE WEB INTERCOSTAL IS OUT OF LIMITS IAW SRM 53-60-15-1A-1, ALLOWABLE DAMAGE 1, TABLE 101, STEP 4.G(2).   REMOVED INTERCOSTAL WEB IAW SRM 51-40-02.  LOCATED AND DRILLED A NEW INTERCOSTAL WEB IAW SRM 51-40-05, AND DWG 146A0081.  INSTALLED NEW INTERCOSTAL WEB IAW SRM 51-40-02 AND DWG 146A0081.

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