104 Naval Aviation Propulsion

104.1 State the type and identify the models of engines used in the F/A-18.

1. LOW BY-PASS AXIAL FLOW TURBO FAN WITH AFTER BURNER.

A) ENGINE SECTIONS -

1) FAN

2) COMPRESSOR

3) COMBUSTION

4) HIGH PRESSURE TURBINE

5) LOW PRESSURE TURBINE

6) AFTER BURNER

2. MODELS - (A, B, C, & D) - USE VIRTUALLY THE SAME ENGINE

A) A/C BUNO'S -

1) 161353 - 164692 : F404-GE400 ENGINE

2) 164693 & UP : F404-GE402 ENGINE

104.2 State the three modes of operation for the Auxiliary Power Unit (APU).

1) MAIN ENGINE START (MES)

2) GROUND MAINTENANCE MODE (GMM) - GIVES THE A/C HYDRAULIC & ELECTRICAL POWER.

3) ENVIRONMENTAL CONTROL SYSTEM (ECS) - BRINGS AIR INTO THE COCKPIT.

104.3 State the purpose and identify the location of the In-Flight Refueling (IFR) probe.

1) LOCATED ON THE RIGHT FORWARD PART OF FUSELAGE.

2) ALLOWS A/C TO TAKE FUEL FROM A TANKER

A) ELECTRICALLY CONTROLLED (W/SWITCH IN COCKPIT), HYDRAULICALLY OPERATED.

104.4 Explain the purpose of the Aircraft Fuel Storage system.

1) THE F/A-18 CAN HOLD THREE DROP TANKS WHICH CARRY 330 GAL'S EACH OR A

TOTAL OF 2240 LBS.

2) HAS 4 INTERNAL CELLS PLUS THE WINGS HOLD FUEL.

A) INTERNAL - 10,200 LBS.

B) W/1 DROP TANK - 13,500 LBS.

C) W/2 DROP TANKS - 15,000 LBS.

D) W/3 DROP TANKS - 17,500 LBS.

104.5 State the purpose of the foam-lined wing tanks.

1) FOR FIRE AND EXPLOSIVE PROOFING

2) IF HIT IN WING DURING COMBAT MISSION WILL NOT CATCH FIRE OR EXPLODE.

A) THERE IS A SWITCH IN THE COCKPIT WHICH KEEPS FUEL FROM

TRANSFERRING TO THE WINGS WHICH THE PILOT CAN USE IF THE WING IS HIT.