What was found
FOLLOW UP TO #1 AND #2 ENGINE START KNOB FALLING OFF CAUSING DELAYS. GROUNDED - YES. REMOVED OLD AND INSTALLED NEW #1 AND #2 ENGINE START KNOBS PER B737-9 AMM 80-11-03.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
FOLLOW UP TO #1 AND #2 ENGINE START KNOB FALLING OFF CAUSING DELAYS. GROUNDED - YES. REMOVED OLD AND INSTALLED NEW #1 AND #2 ENGINE START KNOBS PER B737-9 AMM 80-11-03.