As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6253 - IAD-ABE - DURING TAKEOFF, MADE A UNSCHEDULED LANDING DUE GPU DOOR WARNING LIGHT. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND SECURED GPU ACCESS DOOR. AIRCRAFT WAS RELEASED AND RETURNED TO SERVICE. (M)