As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 517 - YYZ-PHL - LEFT MAIN GEAR DID NOT INDICATE SAFE WITH GEAR DOWN. LEFT MAIN GEAR UNSAFE LIGHT DID NOT ILLUMINATE. FOUND PIN NR 5 AT LEFT MAIN GEAR DOWNLOCK SWITCH PUSHED BACK. REINSTALLED PIN, OPS CHECKS GOOD. TWO TOWER FLY-BY'S WERE CONDUCTED TO VISUALLY ASCERTAIN GEAR POSITION. (M)