# SDR ASAA2022050838309

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 8, 2022
- Submitted: May 16, 2022
- Operation: Air carrier
- Aircraft: [N586AS](https://openairdocs.org/aircraft/N586AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35189
- Aircraft time: 52,620 hours, 15,770 cycles
- System (JASC): [3431 · Localizer/VOR System](https://openairdocs.org/jasc/3431)
- Part: Wire
- Part number: UNKNOWN
- Condition: Loose
- Location: Unknown
- Stage of operation: IN
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022050838309

## Discrepancy

REF ASA L/P 60350724 ASA W/O 1906761 - DURING FMCS OPS CHECK FOUND FMCS #1 FAULTING LEFT MMR FOR 9 CONSECUTIVE LEGS. GROUNDED - YES. TROUBLESHOOT PER B737-800 WDM 34-31-11 PAGE 6, SHEET 2, FOUND WIRE W0211-2020B-24 PULLED FROM ITS TERMINAL BLOCK TB1201. TERMINATED WIRE W0211-2020B-24 AT TERMINAL BLOCK TB1201, POSITION YB7 REF. WDM 34-31-11 PAGE 6, SHEET 2 AND SWPM 20-90-15. CONTINUITY CHECK GOOD. FMCS OPERATIONAL TEST GOOD. FMC BITE FOR MMR#1 AND MMR#2 OK.

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