# SDR SWAA2023020788654

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 5, 2023
- Submitted: February 7, 2023
- Operation: Air carrier
- Aircraft: [N209WN](https://openairdocs.org/aircraft/N209WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 32484
- Aircraft time: 59,684 hours, 35,490 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Angle
- Part number: NOTREPORTED
- Part serial: NOTREPORTED
- 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/SWAA2023020788654

## Discrepancy

CORROSION ON THRESHOLD SUPPORT ANGLE AT FWD WET AREA BS304 - BS328 RBL57.<[01] REMOVED CORROSION ON FWD SERVICE THRESHOLD SUPPORT ANGLE BS304-328 RBL57 IAW SRM 51-10-02-0G-0; EVALUATED AREA AND FOUND TO BE OUT OF LIMITS IAW SRM 53-10-15-1A-2-PART 4.C DETAIL D; MEASURES L=3.0'' X W=1.0'' X D=0.012'' ORIGINAL THICKNESS=0.090'' TOOL USED CALIPER ID: ATS2739 S/N: A22004232 DUE DATE:11/2023 DEPTH GAUGE ID: ATS2677 S/N: UNK; DUE DATE:11/2023; REPAIRABLE BY REPLACEMENT IAW SRM 51-10-02-0G-0 PART 9.A.;[02] VERIFIED MEASUREMENTS<BR>VERIFIED CORRECTIVE ACTION #1; OUT OF LIMITS;[03] REMOVED THRESHOLD SUPPORT ANGLE BS304-328 RBL57 WL 208.1 PER SRM 51-40-02-0G-0;[04] RECIVED; LOCATED AND DRILLED NEW SUPPORT ANGLE AT BS304-328 RBL57 WL 208.1; IAW 737-700 SRM 51-40-05-0G-0 DWG 141A8310.;[05] OK TO INSTALL;[06] VERIFIED CORRECTIVE ACTIONS #4 AND 5 OK TO INSTALL;[07] INSTALLED NEW SUPPORT ANGLE AT BS304-328 RBL57 WL 208.1; IAW 737-700 SRM 51-40-02-0G-0 DWG 141A8310.;[08] RII VERIFIED CORRECTIVE ACTION ITEM 7.;[09] ALL ITEMS ON THIS CARD ARE COMPLETED;[10] VERIFIED ALL REQUIRED CORRECTIVE ACTION ITEMS COMPLETED.

---
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.