# SDR QXEA2020091600284

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 14, 2020
- Submitted: September 16, 2020
- Operation: Air carrier
- Aircraft: N441QX
- Make and model: Bombdr DHC8402
- Aircraft serial: 4348
- Aircraft time: 20,707 hours, 22,400 cycles
- System (JASC): [2211 · Autopilot Computer](https://openairdocs.org/jasc/2211)
- Part: Switch
- Part number: BW9021BBDTC2037
- Condition: Inoperative
- Location: Tcs
- Stage of operation: CL
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QXEA2020091600284

## Discrepancy

DURING CLIMB, TCS BUTTON SEEMED TO STICK AND WE LOST FLIGHT DIRECTOR AND AFSC FUNCTIONS, DIVERTED.  REMOVED FROM SERVICE.  REMOVED AND REPLACED CAPT TCS SWITCH, IAW Q400 AMM 22-11-51-000-801/400-801.  OPS CK GOOD, IAW Q400 AMM 22-11-51-710-801.  A/C OK FOR RETURN TO SERVICE.  AIRCRAFT RETURNED TO SERVICE.

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