What was found
BOS - FLT 1683 - AT 5,000 FEET, THE NR 2 GENERATOR DROPPED OFF LINE. CAPTAIN HAD A BRAND NEW FIRST OFFICER ON BOARD AND WAS NOT CERTAIN ABOUT THE RELIABILITY OF THE APU. CAPTAIN ELECTED TO RETURN TO FIELD AT BOS AFTER STARTING APU AND PLACING APU'S GENERATOR ON LINE. NO EMERGENCY WAS DECLARED AND THE FLIGHT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE ADJUSTED THE FREQUENCY ON THE NR 2 CSD. SYSTEM OPS CHECK GOOD ON GROUND RUN. (M)