# SDR SWAA2023081459840

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 16, 2023
- Submitted: August 14, 2023
- Operation: Air carrier
- Aircraft: [N444WN](https://openairdocs.org/aircraft/N444WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29839
- Aircraft time: 66,457 hours, 39,411 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Channel
- Part number: UNKNOWN
- 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/SWAA2023081459840

## Discrepancy

CORROSION FOUND AFT CARGO RH 'Z' CHANNEL FROM STA 727D TO STA 727E RBL 21 WL 155.5 HAS SPOTS OF CORROSION.<[01] REMOVED CORROSION AT AFT CARGO RH 'Z' CHANNEL FROM STA 727D TO STA 727E RBL 21 WL 155.5 .ORIGINAL MATERIAL 0.040'; MATERIAL LOST 0.012'; MATERIAL REMAINING 0.028'. FOUND OUT OF LIMITS. REMOVED AND INSTALLED FABRICATE AFT CARGO RH 'Z' CHANNEL AS PER SRM 51-40-02-0G-0 AND DWG 146A7500;[02] VERIFIED ENTRY #1 AS WORK ACCOMPLISHED . /REMOVED CORROSION AT AFT CARGO RH 'Z' CHANNEL FROM STA 727D TO STA 727E RBL 21 WL 155.5 .ORIGINAL MATERIAL 0.040'; MATERIAL LOST 0.012'; MATERIAL REMAINING 0.028'. FOUND OUT OF LIMITS. REMOVED AND INSTALLED FABRICATE AFT CARGO RH 'Z' CHANNEL AS PER SRM 51-40-02-0G-0 AND DWG 146A7500

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