# SDR SWAA2022072521239

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 21, 2022
- Submitted: July 25, 2022
- Operation: Air carrier
- Aircraft: [N478WN](https://openairdocs.org/aircraft/N478WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 33989
- Aircraft time: 60,197 hours, 35,659 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Intercostal
- Condition: Cracked
- Location: Pax Cabin
- 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/SWAA2022072521239

## Discrepancy

CABIN FLOOR INTERCOSTAL CRACKED ON UPPER FLANGE BS 360+15' RBL 9. CORRECT LOCATION BS 380+15' / [01] INSTALLED EWIS PROTECTION AT REPAIR AREA AS PER B-737-700 AMM. 20-60-07-913-801;[02] REMOVED DAMAGE CABIN FLOOR INTERCOSTAL UPPER FLANGE AT STA.360+15'AS PER B-737-700 SRM. 51-40-02-0G-0;[03] CORRECTING STA AT STEP #2 STATION IS ( 380 );[04] LOCATED AND DRILLED NEW UPPER CHORD AT STA 380; RBL9 AS PER B737-700 SRM 51-40-05-0G-0.;[05] STEP 2;3;4 CORRECT LOCATION IS 380+15';RBL 9.;[06] VERIFIED 1; 2; 4; 5. OK TO INSTALL NEW FLANGE.;[07] INSTALLED UPPER FLANGE AT CABIN FLOOR INTERCOSTAL STA. 380 TO 400 RBL 9 AS PER B-737-700 SRM 51-40-02-0G-0 AND DWG # 143A5400;[08] REMOVED AND REPLACED CABIN FLOOR INTERCOSTAL UPPER FLANGE AT STA. 380 TO 400 RBL9. AS PER B-737-700 SRM.51-40-02-0G-0 AND DWG # 143A5400;[09] VERIFIED 7-8

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