As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#1 ENG ACTUATOR TEST FAILED, FAULT CODE 75-20431 AND 75-30531. GROUNDED - YES. ACCOMPLISHED B737-900 FIM 75-32 TASK 801 AND 75-22 TASK 801 FOR VBV DEMAND/POSITION AND LPTACC DEMAND/POSITION DISAGREE FAULTS. ELECTRICAL CKS PER TABLE 201 ON BOTH FIM TASKS RETURNED NO FAULTS. ACCOMPLISHED ACTUATORS TEST AND VERIFIED FAULTS 75-30431 AND 75-20531 ACTIVE. SEE LP 60342266 FOR REPLACEMENT OF #1 ENG HMU.