What was found
CRUISING AT FL380 A GEA 1 FAIL ILLUMINATED. ALSO HAD NUMEROUS OTHER CAS MESSAGES. PRESN AUTO FAIL ADS 2 SLIP FAIL ADS 1 SLIP FAIL ENG NO DISPATCH THE AUTO PILOT WAS NOT FUNCTIONING NORMALLY NEEDED TO DO AND ALTERNATE GEAR EXTENSION. WERE NEVER ABLE TO GET A GEAR DOWN AND LOCK INDICATION. POWERED UP AIRCRAFT SENT CMC DOWNLOAD TO CONTACT CENTER. REMOVED LOWER COWLING, REMOVED HYD PUMP, JACKED AIRCRAFT INSTALLED MULE, RESET EMERGENCY GEAR HANDLE PERFORMED. 5 NORMAL GEAR SWINGS, NO DEFECTS NOTED IAW AMM 32-31-00. DOWN JACKED A/C REMOVED MULE INSTALLED HYD PUMP IAW AMM 29-12-01 OPS CHECKED GOOD, AND REINSTALLED COWLING IAW 71-12-20. SERVICED HYD RESERVOIR IAW AMM 12-13-00 08-05-20. REMOVED FAULTY NR 1 GEA AND INSTALLED REPAIRED GEA. LOADED SOFTWARE, OPS CHECKED GOOD IAW AMM 31-41-03-470-801-A.