# SDR ASAA2021040534516

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 5, 2021
- Submitted: April 7, 2021
- Operation: Air carrier
- Aircraft: [N516AS](https://openairdocs.org/aircraft/N516AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 39044
- Aircraft time: 44,758 hours, 13,462 cycles
- System (JASC): [2230 · Auto Throttle System](https://openairdocs.org/jasc/2230)
- Part: Autothrottle Sys
- Condition: Malfunctioned
- Stage of operation: TX
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021040534516

## Discrepancy

AUTO THROTTLE WILL NOT ARM ON TAXI OUT. FOUND C/B E1 POPPED. GROUNDED - YES. RESET C/B E1 (A/T DC1), PERFORMED A/T BITE PROCEDURE REF B737-800 FIM 22-31 801 FOUND FAULT MSG 22-31263 (A/T 28 VDC PWR INV) IN FLIGHT HISTORY, CURRENT STATUS SHOWS NO FAULTS, PER FIM 22-31 TASK 810 STEP (E)2 MSG 22-31263 IS INTERMITTENT 28 VDC POWER FAULT.

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