What was found
CREW REPORTED AN INFLIGHT LOSS OF TR 1 AT 16,000 FEET. LOSS OF ELEC AND ND. IMMEDIATE ACTION ITEMS EXECUTED AND STARTED APU. POWER WAS RE-ESTABLISHED. FLIGHT LANDED NORMAL AT DCA. MAINTENANCE REMOVED AND REPLACED NR 1 TR PER AMM TASK 24-32-51-000-001-A AND 24-32-51-400-001-A. ALSO, REPLACED NR 1 GLC AND NR 1 BTC PER AMM TASK 24-22-000-001-A AND 24-22-55-000-001-A AND AC ESSENTIAL BUS TIE CONTACTOR PER AMM TASK 24-25-55-000-001-A AND 24-25-55-400-001-A. ACCOMPLISHED TSM 24-21-00-810-846 PER AD 2011-19-01, R1. RAN NR 1 AND NR 2 ENGINES. ACCOMPLISHED SATISFACTORY AC/DC BUS ELECTRICAL TRANSFER. A/C OK FOR SERVICE.