# SDR SWAA2021120644152

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 15, 2021
- Submitted: December 6, 2021
- Operation: Air carrier
- Aircraft: [N914WN](https://openairdocs.org/aircraft/N914WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 36622
- Aircraft time: 45,576 hours, 27,409 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Support
- 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/SWAA2021120644152

## Discrepancy

CORROSION ON ACB LH FLOOR-TO-SIDEWALL SUPPORT; BS 727D+3' TO BS 727D+7'; LBL 22 (ALL MARKED) ; / [01] REMOVED CORROSION ON ACB FLOOR TO SIDEWALL SUPPORT; BS727D+3'; BS 727D+7'; LBL22. MEASURES BS 727D+7': L=0.800'; W=0.600'; D=0.011'. ORIGINAL THICKNESS 0.040'; MATERIAL LOSS 0.011'; REMAINING THICKNESS 0.029'. THE SIDEWALL SUPPORT IS OUT OF LIMITS.IAW. SRM 53-00-53-1A-2; ALLOWABLE DAMAGE 2; STEP 4.(2); TOOL USED: DEPTH GAGE ID:ATS1225; DUE DATE07/2022.; [02] CORRECTION P/N 146A7502-29; [03] VERIFIED CORROSION REMOVAL ON ACB LH F-T-S SUPPORT FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2; [04] THIS DISCREPANCY WILL ACCOMPLISHED ON CARD TTG8Q009BFVR.; [05] VERIFIED WORK TO BE ACCOMPLISHED ON FAULT TTG8Q009BFVR

---
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.