As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JFK-PIT - FLT NR 7791 - UPON SELECTING LANDING GEAR DOWN, THE TRANSIT LIGHTS CAME ON AND OFF FIVE TIMES WITH AN ASSOCIATED HYDRAULIC SURGE. THEREAFTER, THE GEAR EXTENDED NORMALLY. REPLACED LANDING GEAR SELECTOR. THE AIRCRAFT WAS RELEASED IAW THE MEL AT PIT AND REPOSITIONED TO PNE FOR REPAIR. (M)