# SDR SWAA2022042085217

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 17, 2022
- Submitted: April 20, 2022
- Operation: Air carrier
- Aircraft: [N472WN](https://openairdocs.org/aircraft/N472WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 33831
- Aircraft time: 58,559 hours, 34,804 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Channel
- Condition: Corroded
- Location: Fwd Fuselage
- 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/SWAA2022042085217

## Discrepancy

CORROSION ON FORWARD LAVATORY FLOOR SUPPORT CHANNEL AT B.S. 294.5 - B.S. 312; L.B.L. 10; W.L. 208.1. / [01] REMOVED CORROSION ON FWD LAV SUPPORT CHANNEL BS 294-312 LBL 10 WL 208.1 AREA OF 6'X1.5' 100% MATERIAL LOSS FOUND TO BE OUT OF LIMITS I.A.W SRM 53-10-51-1A-1;[02] CORRECTED MEASUREMENTS;[03] INSPECTED & VERIFIED CORRECTIVE ACTION ITEM 1 & 2.;[04] REMOVED ON FORWARD LAVATORY FLOOR SUPPORT CHANNEL AT BS 294.5 TO BS 312 LBL 10 WL 208.1 IAW SRM 51-40-02;[05] PARTIAL STEPS 1;2;[06] OK TO INSTALL FORWARD LAVATORY FLOOR SUPPORT CHANNEL;[07] RECEIVED ON FORWARD LAVATORY FLOOR SUPPORT CHANNEL AT BS294.5-BS312 LBL10 WL208.1 ITEM 141A5690U1 PO#861051 IAW SRM 51-40-02 AND DWG 141A5600;[08] VERIFIED CORRECTIVE ACTIONS 6 AND 7.;[09] INSTALLED ON FORWARD LAVATORY FLOOR SUPPORT CHANNEL AT BS 294.5 - BS 312 LBL 10 WL 208.1 IAW SRM 51-40-02 AND DWG 141A5600;[10] UPDATED PARTS USED;[11] VERIFIED CORRECTIVE ACTION 9-10;[12] VERIFIED ALL WORK COMPLETE

---
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.