# SDR CALA2025031002670

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 6, 2025
- Submitted: March 10, 2025
- Operation: Air carrier
- Aircraft: [N66841](https://openairdocs.org/aircraft/N66841), registered now
- Make and model: Boeing 737924ER
- Aircraft serial: 42182
- Aircraft time: 32,172 hours, 11,745 cycles
- System (JASC): [2230 · Auto Throttle System](https://openairdocs.org/jasc/2230)
- Part: Autothrottle Sys
- Condition: Disconnected
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2025031002670

## Discrepancy

AUTOTHROTTLES DISCONNECT ON TO ROLL. VNAV FAILURE ON CLIMBOUT. U NABLE TO ENGAGE AUTOPILOT PERFORMED DFCS BITE, FOUND MSG 22-11208 IN LAST LEG. REF FIM 22-13 TASK 818 PERFORMED SPEED/STAB TRIM TEST 32, TESTS OK. ALSO PERFORMED A/T BITE PROCEDURE, FOUND MSG 22-31687 IN LAST LEG. REF FIM 22-32 TASK 819 PERFORMED SERVO MOTOR TEST, TEST PASSED.   ALSO PERFORMED A/T MODE ANNUNCIATION TEST AND DISENGAGE/WARNING TEST, BOTH TESTS PASSED. CURRENT STATUS TEST FOR DFCS AND A/T SHOW NO FAULTS. RESET AS PRECAUTIONARY, COULD NOT DUPLICATE FAULTS. NO HISTORY. CONCURRED WITH TOMC.

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