# SDR SWAA2024011232743

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 16, 2023
- Submitted: January 12, 2024
- Operation: Air carrier
- Aircraft: [N8560Z](https://openairdocs.org/aircraft/N8560Z), registered now
- Make and model: Boeing 737-8H4
- Registry model: [Boeing 737-8H4](https://openairdocs.org/model/boeing-737-8h4) (OpenAirDocs)
- Aircraft serial: 64115
- Aircraft time: 19,593 hours, 9,949 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/SWAA2024011232743

## Discrepancy

AFT / CARGO L/S ' Z-CHANNEL SECTION ' FROM STA 727 - STA 727E SHOWS CORROSION AT 6 FASTENER HOLE LOCATIONS; ON BOTTOM SURFACE OF Z-CHANNEL ASSY.<[01] REMOVED CORROSION; PERFORMED UT THICKNESS INSPECTION; CHECKED LIMITS OF REWORKED AREA ON AFT CARGO L/S Z CHANNEL STA 727 TO STA 727E PART FOUND TO BE OUT OF LIMITS PER SRM 51-10-02-0G-0; SRM 53-00-53-1A-2. <BR>FABRICATION AND INSTALLATION OF LEFT Z CHANNEL TO BE ACCOMPLISHED ON TASK CARD #TTG8Q00Q6FVQ;[02] VERIFIED STEP 1.

---
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.