# SDR NACA2021081630001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 13, 2021
- Submitted: August 16, 2021
- Operation: Air carrier
- Aircraft: [N321CM](https://openairdocs.org/aircraft/N321CM), registered now
- Make and model: Boeing 767323
- Aircraft serial: 29431
- Aircraft time: 81,864 hours, 13,626 cycles
- System (JASC): [2611 · Smoke Detection](https://openairdocs.org/jasc/2611)
- Part: Pressure Switch
- Part number: 32V92
- Part serial: 3437
- Condition: Faulted
- Location: Smoke Detector
- Stage of operation: NR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/NACA2021081630001

## Discrepancy

DISCREPANCY: EICAS MESSAGE AFT DET FAN ON MAINT PAGE. CORRECTIVE ACTION: REPLACED AFT SMOKE DETECTOR PLENUM PRESSURE SWITCH AND OPS CHECK GOOD IAW AMM 26-16-03. GROUND CHECK GOOD, AC REMAINS ETOPS 180

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