Figure 6-1 Airframe Anti-Icing Systems (un-119)

STUDENT GUIDE T-39N/G NATOPS

E. Fuel Heater

1. Used when FUEL FILTER BLOCK light illuminates (possible ice crystals) or when

fuel temperature drops below 0 C to warm fuel filter. Fuel heater is in the engine fuel pump,

upstream of the fuel filter, NOT in fuel tank (fuel temp probe in left fuel tank).

2. One minute time limit for every 30 minutes to prevent oil overheat.

3. NOT to be used on takeoff or landings.

F. With engine anti-ice systems on, use appropriate charts for computing Max continuous,

climb, Cruise, and Reverse thrust EPR values. Reduce Wave Off EPR by 10, per the chart

notes.

Figure 6-1

Airframe Anti-Icing Systems (un-119)

ANTI-ICE/DE-ICE SYSTEMS

6-3