# SDR DALA2016021801259

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 4, 2016
- Submitted: February 19, 2016
- Operation: Air carrier
- Aircraft: [N652DL](https://openairdocs.org/aircraft/N652DL), registered now
- Make and model: Boeing 757232
- Aircraft serial: 24392
- Aircraft time: 87,049 hours, 36,361 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Threshold
- Condition: Corroded
- Location: L4 Door
- 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/DALA2016021801259

## Discrepancy

L4 THRESHOLD LOWER SILL 2 EA.  THRESHOLD SUPPORT CORRODED CP53-251-01L.  REMOVED DAMAGED HAT CHANNELS AT LT 4 DOOR LOWER THRESHOLD IAW SRM 51-40-02.  LOCATED AND DRILLED NEW HAT CHANNELS 2  EA, PN 146N8769U47.  INSTALLED NUT PLATES, TREATED PRIMED HOLES AND INSTALLED CHANNELS IAW DWG NR 146N8722, REV N, AMM  51-20-01, SRM 51-40-02.

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