# SDR CALA2026041315335

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 10, 2026
- Submitted: April 13, 2026
- Operation: Air carrier
- Aircraft: [N67846](https://openairdocs.org/aircraft/N67846), registered now
- Make and model: Boeing 737924ER
- Aircraft serial: 42186
- Aircraft time: 35,158 hours, 12,963 cycles
- System (JASC): [2230 · Auto Throttle System](https://openairdocs.org/jasc/2230)
- Part: Autothrottle Sys
- Condition: Malfunctioned
- Stage of operation: CL
- How discovered: O
- Nature of condition: F
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026041315335

## Discrepancy

A/P A AND B +A/T UNRB AND FAULTY/N1 SETTINGS ALL PHASES/FLT DEBRIEFED CREW. CREW REPORTED AUTOTHOTTLES WOULD NOT MAINTAIN COMMANDED THRUST DURING CLIMB, SET AT 95.1 PERCENT AND WENT TO ONLY 74.0 PERCENT, CREW DISC. A/T. DURING CLIMB ON A/P "A" A/C PITCHED OVER TO LEVEL OFF, VNAV NOT ENGAGING. CREW DISC. AUTOPILOT "A" AND THEN ENGAGED A/P "B" WITH SAME RESULTS. CREW VERIFIED CORRECT INPUTS IN FMC AND CORRECT BUG SETTINGS. SAME ON DECENT NO VNAV. PERFORMED DIGITAL FLIGHT CONTROL SYSTEM OPS TEST IAW AMM 22-11-00-740-801, AUTOTHROTTLE SYSTEM OPS TEST IAW AMM 22-31-00-710-801 AND FLIGHT MANAGEMENT COMPUTER OPS TEST IAW AMM 34-61-00-710-801. NO PREVIOUS FLIGHT FAULTS AND NO CURRENT ADD EMP:U446791 FAULTS. ALL TESTS PASSED. PERFORMED ONLY LAND VERIFY TEST PER AMM. 22-11-00-700-801. ALL TEST PASSED. A/C REMAINS FULL CAT CAPIBILITY.

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