As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI OUT, LDG GEAR MONITOR STATUS MESSAGE APPEARED , A.C THEN RETURNED TO GATE (BTB) AND MTX GROUNDED A/C ,MTX TROUBLE SHOT AND REMOVED AND RE INSTALLED PSEU IAW AMM 32-61-00 . PFM ADJUSTMENT TEST NOSE L/G PROXIMITY SENSOR ,MSG CLEARED IAW AMM 32-61-03 BITE CHK OK. PER FIM 32-09 FAULT TREE 803. AND RETURNED ACFT TO SERVICE.