As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DCA - FLT 1950 - AFTER TAKEOFF, CREW COULD NOT RETRACT THE LANDING GEAR. FLIGHT RETURNED TO FIELD AT DCA AND LANDED WITHOUT INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE PINNED THE GEAR AND PLACED THE AIRCRAFT IN THE AIR MODE. PROBLEM WAS DUPLICATED. FOUND 'LANDING GEAR LEVER LATCH AND PRESSURE WARNING' CIRCUIT BREAKER ON THE P6-2 PANEL TRIPPED. RESET CIRCUIT BREAKER AND TESTED SYSTEM PER MM 32-31. OPERATIONAL CHECK GOOD. REMOVED GEAR PINS. (X)