As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT # 4499. durning takeoff did not get autocoursen arm light. crew aborted take-off and returned to gate. found light assy loose in socket. pilot did not notice durning lights check. Mechanic resecured light assy and performed ground run. IAW 61-22-00-5. Ops checked good. A/C returned to service without further notice.