TM 9-2815-225-34&P 1-10.  EQUIPMENT DATA (Contd) Maximum No Load Governed Speed ................................................................................ 2460 rpm Maximum Approved Altitude, Transient Mode ................................................................... 12,000 ft (3658 m) Maximum Approved Altitude, Continuous Operation  ......................................................... 6000 ft (1829 m) Ambient Air Temperature Above Which     Output Should be Limited ............................................................................................. 100F (37.8C) Air Flow @ 400 hp @ 2100 rpm  ....................................................................................... 985 CFM Exhaust Flow @ 400 hp @ 2100 rpm ............................................................................... 2320 CFM Nominal Fuel Consumption @ 2100 rpm  .......................................................................... 144 lb/hr Nominal Fuel Consumption @ 500 rpm     (Peak Torque)  ............................................................................................................. 116 lb/hr Maximum Fuel Flow to Pump @ 2100 rpm  ....................................................................... 485 lb/hr Maximum Allowable Restriction to Pump:     Clean Filter .................................................................................................................. 4.0 in.  Hg     Dirty Filter .................................................................................................................... 8.0 in.  Hg Maximum Allowable Return Line Restriction  ..................................................................... 2.5 in.  Hg 1-6