# SDR DALA2017021501285

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 14, 2017
- Submitted: February 16, 2017
- Operation: Air carrier
- Aircraft: [N658DL](https://openairdocs.org/aircraft/N658DL), registered now
- Make and model: Boeing 757232
- Aircraft serial: 24420
- Aircraft time: 81,885 hours, 37,526 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Support Channel
- Condition: Corroded
- Location: Fuselage
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2017021501285

## Discrepancy

L4 DOOR CUTOUT LOWER SILL STA 1661+3" THRESHOLD SUPPORT CHANNEL CORRODED. REMOVED AND REPLACE THRESHOLD SUPPORT CHANNEL IAW SRM 51-40-02 AND DWG 146N8722 DUE TO CORROSION OUT OF LIMITS. FOUND CORROSION TO BE OUT OF LIMITS IAW SRM 53-00-51 FIG 101. (100% MATERIAL LOSS).

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