As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 6284 - IAD-HPN - DURING CLIMB-OUT, RETURNED TO IAD DUE TO THE RIGHT SRL AND RT BETA LIGHT ILLUMINATING. AIRCRAFT LANDED AT IAD WITH NO FURTHER INCIDENTS. MAINTENANCE REPLACED THE P3 LINE, WHICH WAS BROKEN. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)