# SDR ASAA2023110145973

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 1, 2023
- Submitted: November 3, 2023
- Operation: Air carrier
- Aircraft: [N588AS](https://openairdocs.org/aircraft/N588AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35685
- Aircraft time: 56,213 hours, 16,800 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Computer
- Part number: 8221604101
- Part serial: 16YP3D
- Condition: Faulted
- Location: E/E Shelf E1-4
- Part time: 56,208 hours, 16,797 cycles
- Stage of operation: NR
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023110145973

## Discrepancy

AIRSPEED SETTING BUG WAS STUCK @ UP. CAPTAIN SIDE NORMAL (AIRSPEED VNAV COMMAND ON SPEED TAPE). F/D DISAPPEARED F/O SIDE. ALL RESOLVED TO NORMAL @ 10,000 FT. XFER FROM L/P 60739024. GROUNDED - YES. DFCS BITE FOR B CHANNEL SHOWS MSG 22-11537 AND 22-11559. LRU REPLACEMENT TEST FOR FCC B GROUP TEST 20.00 PASS REF 22-11 TASK 801.11799. REMOVED AND REPLACED FCC B PER AMM 22-11-33. INSTALLATION TEST GOOD, ALL TESTS PASS. HARDWARE AND FCC OPS PN'S CORRECT.

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