# SDR SWAA2023040413518

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 7, 2023
- Submitted: April 4, 2023
- Operation: Air carrier
- Aircraft: N7819A
- Make and model: Boeing 737-7Q8
- Registry model: [Boeing 737-7Q8](https://openairdocs.org/model/boeing-737-7q8) (OpenAirDocs)
- Aircraft serial: 30649
- Aircraft time: 65,235 hours, 39,673 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Support
- 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/SWAA2023040413518

## Discrepancy

MULTIPLE AREA OF CORROSION ON AFT CARGO BAY FLOOR TO SIDEWALL SUPPORT AT RBL 21 BS 727+5-767.<[01] EVALUATED CORROSION AT ALL LOCATION OF FLOOR TO SIDEWALL SUPPORT; FOUND DEEPEST LOCATION TO BE AT BS 747+10 RBL 21 WL 156; FOUND 0.015 REMOVED FROM ORIGINAL 0.040 IN NUMEROUS 1'X1' AREAS FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2 USING DIAL DEPTH GAUGE NCX000697 DUE 09/2023;[02] VERIFIED CORRECTIVE ACTIONS STEP 1.;[03] LOCATED AND DRILLED NEW FLOOR TO SIDEWALL SUPPORT AT BS 727 TO BS 767 RBL 21 PER SRM 51-40-05-0G-0 AND DWG 146A7500;[04] VERIFIED CORRECTIVE ACTION 3 AND MEASUREMENT TABLE.

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