# SDR SWAA2023033016498

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 15, 2023
- Submitted: March 30, 2023
- Operation: Air carrier
- Aircraft: [N556WN](https://openairdocs.org/aircraft/N556WN), registered now
- Make and model: Boeing 737-7BD
- Registry model: [Boeing 737-7BD](https://openairdocs.org/model/boeing-737-7bd) (OpenAirDocs)
- Aircraft serial: 33936
- Aircraft time: 37,398 hours, 21,958 cycles
- System (JASC): [5300 · Fuselage Structure (General)](https://openairdocs.org/jasc/5300)
- Part: Web
- 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/SWAA2023033016498

## Discrepancy

WHILE PERFORMING OK TO CIC FOUND CORROSION ON THE INTERNAL PRESSURE BULKHEAD WEB SKIN AFT OF BS 1016 TO 2' UP THE PRESSURE WEB FROM RBL5-LBL4.  REMOVED CORROSION ON THE INTERNAL PRESSURE BULKHEAD WEB SKIN AFT OF BS 1016 TO 2' UP THE PRESSURE WEB FROM RBL5-LBL4 IAW SRM 51-10-02-0G-0 ; ORIGINAL THICKNESS IS 0.040' IAW SRM 53-80-08-0I-1.  VERIFIED CORROSION REMOVAL NOTED SEVERAL OUT OF ROUND HOLES BL 0- RBL 5. REPAIRED PER EA 23-153-00918 WITH FOLLOW-UP INSPECTIONS SCHEDULED IN EA 23-153-00918-DTI.

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