# SDR SWAA2023062758412

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 13, 2023
- Submitted: June 27, 2023
- Operation: Air carrier
- Aircraft: [N942WN](https://openairdocs.org/aircraft/N942WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 36648
- Aircraft time: 45,425 hours, 27,767 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/SWAA2023062758412

## Discrepancy

MODERATE TO FLACKING LEVALS OF CORROSION FOUND ON UNDER SIDE OF LT. SIDE OF Z-CHANNEL SECTION FROM STA 807- STA 847 AT FASTENER HOLE LOCATIONS. ( MRKED ).<[01] REMOVED CORROSION ON L/H Z-CHANNEL FROM STA. 807 - STA. 847 PER REF. SRM 51-10-02-0G-0; AFTER FURTHER EVALUATION FOUND CORROSION BLOWN OUT PER REF SRM 53-00-53-1A-2 FIGURE 103 DETAIL D AND REF TASK CARD TTG8Q00LLK9D FOR L/H Z-CHANNEL REPLACEMENT AT AFT CARGO COMPARTMENT.;[02] VERIFIED FINAL CORRECTIVE ACTION.

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