As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PERFORMED TASK CARD 78273000. #1 ENG HAD SHORT TIME FAULT 75-30451 "THE VSV POSITION SIGNAL DISAGREE". GROUNDED - YES. (RESOLVED ON W/O: 1570220 TASKCARD: N/R-00001 ) ENGINE #1 EEC BITE SHOWS ONLY ONE OCCURRENCE OF 75-30451 IN PREVIOUS 10 FLIGHT LEGS. ACCOMPLISHED B737-900 FIM 75-32 TASK 803, INITIAL EVALUATION AND REPAIR CONFIRMATION OPS NORMAL, FAULT DOES NO RE-OCCUR. PLT CLEARED.