OPERATION 3.4 ELECTRONIC MONITORING AND CONTROL SYSTEM ECS Information No. 1460: (1465) # Initial 1000 h Maintenance Perform initial 1000 h Maintenance. Perform also the 250 h/ 500 h Maintenance. Information No. 1470: (1475) # Periodic 250 h Maintenance Perform periodic 250 h Maintenance Information No. 1480: (1485) # Periodic 500 h Maintenance Perform periodic 500 h Maintenance. Perform also the 250 h Maintenance. # Periodic 1000 h Maintenance Perform periodic 1000 h Maintenance. Perform also the 250 h/ 500 h Maintenance. Information No. 1490: (1495) Information No. 1500: (1505) # Periodic 2000 h Maintenance Perform periodic 2000 h Maintenance.
Perform also the 250 h/ 500 h/ 1000 h Mainte- nance. Information No. 1510: (1515) # Periodic 3000 h Maintenance Perform periodic 3000 h Maintenance. Perform also the 250 h/ 500 h/ 1000 h Mainte- nance. 181