# SDR AALA2019121969004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 15, 2019
- Submitted: December 19, 2019
- Operation: Air carrier
- Aircraft: [N989AN](https://openairdocs.org/aircraft/N989AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 33205
- Aircraft time: 33,427 hours, 13,452 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Switch
- Part number: 2PB11T2
- Condition: Unreliable
- Location: Thrust Lever
- Stage of operation: TO
- How discovered: O
- Nature of condition: S
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA2019121969004

## Discrepancy

AIRCRAFT WAS GROUNDED: PILOT REPORTS ON TAKE OFF ROLL, TO/GA WAS PUSHED AT 40% N1, THRUST LEVERS ADVANCED TO TAKEOFF POWER, BUT FLIGHT DIRECTORS DID NOT APPEAR UNTIL AIRBORNE BY SELECTING HEADING AND V NAV. MAINTENANCE REPLACED #2 THRUST LEVER TO/GA SWITCH AND OPS CHECKED GOOD IAW AMM 22-11-39.

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