# SDR SWAA2021071684807

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 15, 2021
- Submitted: July 16, 2021
- Operation: Air carrier
- Aircraft: [N489WN](https://openairdocs.org/aircraft/N489WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 33855
- Aircraft time: 54,253 hours, 32,244 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Seat Track
- Condition: Corroded
- Location: 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/SWAA2021071684807

## Discrepancy

CORROSION ON TOP AND IN WELL OF SEAT TRACK CROWN BS 540-620 LBL 25 WL 208. ; / [01] REMOVED CORROSION ON TOP AND IN WELL OF SEAT TRACK CROWN STA 540-620; LBL 25; WL 208. MAX MATERIAL REMOVED ON TOP WAS .025' .5 BY 1'; .018' 1' BY 1' IN WELL. OUT OF LIMITS PER SRM 53-00-52-1A-1; SRM 51-10-02-0G-0. MEASURED DEPTH WITH DIAL DEPTH GAUGE ID# ATS400 S/N UNKNOWN; EXPIRES 04/2022; [02] VERIFIED CORROSION REMOVED AND OUT OF LIMITS PER SRM 53-00-52-1A-1; [03] REMOVED OUT OF LIMIT SEAT TRACK AT BS540-BS727B LBL25 WL208 IAW SRM 51-40-02-0G-0; [04] OK TO INSTALL NEW SEAT TRACK AT BS540-BS727B LBL25 WL208; [05] VERIFIED OK TO INSTALL NEW SEAT TRACK; [06] INSTALLED NEW SEAT TRACK FROM BS540-BS727B LBL25 WL208 IAW SRM 51-40-02-0G-0 DWG 144A5300; [07] VERIFIED INSTALLATION OF TRACK AT LBL 25 BS 540-727B; [08] JOB COMPLETE

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