As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AMENDED:.AFTER BOTH ENG'S STARTED ADP PRESS LGT ILLUMINATED PRESS LGT STAYS ILUMINATED WITH SELECTOR SWITCH IN ON POSTION .AC RETURNED TO THE GATE , MAINTENACE GROUNDED AC DEFERRED ADP FOR DEPARTURE IAW MEL ABX-29-11-3. RETURENED AC TO SERVICE AND DEPARTED. REMOVED AND REPLACED ADP O/S CARD IAW B767 AMM 29-11-69 AND HYD SYS OVHD PANEL ASSY IAW AMM 29-11-40. OPS CHK GOOD. NO MESSAGE PRESENT.