# SDR SWAA2022072922262

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 23, 2022
- Submitted: July 29, 2022
- Operation: Air carrier
- Aircraft: [N428WN](https://openairdocs.org/aircraft/N428WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29844
- Aircraft time: 66,134 hours, 39,057 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Channel
- Condition: Corroded
- Location: Aft Cargo
- 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/SWAA2022072922262

## Discrepancy

CORROSION. SPOTS AFT CARGO BILGE L/H ZEE CHANNEL S-25L FROM STA 727 TO STA 847 / [01] CLEANED CORROSION AT AFT CARGO COMP BILGE L/H Z CHANNEL ABOVE STR 25L FROM STA 727 TO STA 847;FOUND EXFOLIATED CORROSION OUT OF LIMITS AT STA 727 A AND STA 767 AS PER REF B737-700 SRM 53-00-5301A-2.;[02] VERIFIED; STEP # 1;[03] RECIEVED NEW ZEE CHANNEL PN: 146A7502-27 FOR AFT CARGO COMPT.<BR>FROM STA 747 TO STA 847.<BR>DRILLED AND LOCATED NEW ZEE CHANNEL PER REF. B737-700 SRM 51-40-05-0G-0;[04] NEW ZEE CHANNEL SECTION (LT SIDE FROM STA 727 TO STA 847 WILL BE INSTALLED ON TASK TTG8Q004CT6Z.);[05] CORRECTION ON STEP 3 : NEW ZEE SECTION AT LT SIDE IS FROM STA 727 TO STA 847.;[06] VERIFIED ALL STEPS

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