What was found
BOS - FLT 1292 - DURING APPROACH TO BOS WHEN LANDING GEAR EXTENDED, LT MLG WOULD NOT EXTEND AND GEAR DOOR AMBER AND GEAR RED LIGHT WERE ILLUMINATED. CONDITION CONTINUED FOR APPROXIMATELY 3 MINUTES AFTER WHICH LT MLG EXTENDED WITH NORMAL GEAR LOCK INDICATIONS. AIRCRAFT LANDED BOS WITHOUT INCIDENT. AIRCRAFT GEAR DOWN MAINTENANCE FERRY BOS/JFK. REPLACED LT MLG HIGH PRESSURE RESTRICTOR. ACCOMPLISHED LANDING GEAR RETRACTION CHECK WITH NO DEFECTS FOUND. SYSTEM GROUND CHECKED, NORMAL OPERATION. (X)