# SDR SWAA2023021090425

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 10, 2023
- Submitted: February 10, 2023
- Operation: Air carrier
- Aircraft: [N214WN](https://openairdocs.org/aircraft/N214WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 32486
- Aircraft time: 59,300 hours, 35,194 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Channel
- 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/SWAA2023021090425

## Discrepancy

FWD CARGO FLOOR SUPPORT 24' LEFT OF CENTER LINE 'Z' CHANNEL AT B/S 460-480 HAS LIGHT CORROSION AROUND NUT PLATE HOLES<[01] FOUND EXFOLIATED CORROSION AND CRACK AT FWD CARGO FLOOR SUPPORT Z CHANNEL LBL 24 PER REF SRM 51-10-02-0G-0;[02] LOCATED AND DRILLED NEW Z-CHANNEL FROM STA 400 TO STA 500D LBL 24 PER REF SRM 51-40-05-0G-0 MATERIAL USED (BAC1496-444 7075-T6) PO:1800018;[03] VERIFIED STEP 1 AND 2 EXFOLIATED CORROSION; LOCATED AND DRILLED. OK TO TREAT AND PRIME NEW Z CHANNEL.;[04] TREATED AND PRIMED NEW FWD CARGO L/H ZEE-CHANNEL STA 400-STA 500D PER REF AMM 51-21-72-370-804 AND AMM 51-21-41-370-802;[05] FOUND EXFOLIATED CORROSION AND CRACK AT FWD CARGO FLOOR SUPPORT Z CHANNEL LBL 24 PER REF SRM 51-10-02-0G-0<BR>LOCATED AND DRILLED NEW Z-CHANNEL FROM STA 400 TO STA 500D LBL 24 PER REF SRM 51-40-05-0G-0 MATERIAL USED (BAC1496-444 7075-T6) PO:1800018<BR>TREATED AND PRIMED NEW FWD CARGO L/H ZEE-CHANNEL STA 400-STA 500D PER REF AMM 51-21-72-370-804 AND AMM 51-21-41-370-802;[06] JOB IS COMPLETE;[07] VERIFIED STEP # 4 TREAT AND PRIME.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.