What was found
STAB TRIM AND MACH TRIM WILL NOT ENGAGE ON GROUND. REMOVED AND REPLACED HSTA & MCU IAW MM 27-40-00. OPS CHECK OK.MCU P/N: 7062-3 S/N OFF: 829.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
STAB TRIM AND MACH TRIM WILL NOT ENGAGE ON GROUND. REMOVED AND REPLACED HSTA & MCU IAW MM 27-40-00. OPS CHECK OK.MCU P/N: 7062-3 S/N OFF: 829.