Engine Systems J-52-P408

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Engine SystemsJ-52-P408 J-52-P6/P8
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Lesson Objectives

• Introduce the major components of the J-52-P408
  and the J-52-P8 TURBOJET ENGINE in the A-4N and
  TA-4.
• To familiarize the Transition Pilot with basic
  operation to include
• Basic Engine Operation
• Associated ENGINE instruments COCKPIT CONTROLS
• Operational procedures
• Engine Limits
• Emergency Procedures

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Major Assemblies
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Inlet Guide Vane (A-4N Only)
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Engine Anti-Icing System
TA-4
A-4
Right Outboard Wedge Panel
ANTI-ICE Switch
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J-52-P408/P6 COMPARISON
Note Minimum RPM airborne for P-8 is 70
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LUBRICATION SYSTEM
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OIL PRESSURE
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OIL QUANTITY
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Oil Press Light INOP
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A-4 ENGINE IGNITION SYSTEM
The ignition timer energizes the igniters for a
30 to 45 second firing cycle. The momentary
ignition switch, which is used to energize the
ignition timer, is the switch actuated by
movement of the throttle outboard.
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ENGINE FUEL SYSTEM
-The engine fuel system is designed to permit
selection of desired engine power requirements at
all operating altitudes and temperatures. -The
system has two major components The engine fuel
pump and the fuel control. -Fuel is supplied to
combustion chambers at pressures and flows
necessary to meet these requirements. -Fuel is
supplied from the tanks through necessary
strainers and valves to engine driven fuel
pump. -Fuel then passes through a fuel anti-icing
system installed between the boost and main
stages of the pump and is pumped to fuel control
unit where it is metered in proper
quantities. -Excess fuel is returned to the pump.
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FUEL ANTI-ICING
-When fuel in the aircraft fuel tanks becomes
severely chilled, icing of the filter may occur,
and obstruct fuel flow. A bypass valve will allow
fuel to bypass filter if filter is
obstructed. -Fuel anti-icing system prevents this
icing condition by automatically warming fuel,
using hot compressor discharge air. -Although
fuel flows through heater at all times, airflow
is prevented unless conditions require fuel
heating. -Fuel temperature sensing element of air
shutoff valve senses and controls fuel
temperature at approximately 50 deg F (10 deg C)
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ENGINE FIRE DETECTION SYSTEM
Fire Warning Light
TA-4
A-4N
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Main Instrument Panel Engine/Fuel
TA-4
A-4N
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Manual Fuel Light
TA-4
A-4N
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STARTING THE ENGINE
GROUND CONTROLLED ENGINE START. 1. Pilot holds
one finger vertically--P/C CONNECTS EXTERNAL
POWER AND STARTS GTC 2. ICS--------------------
---------------CHECK 3. Master press-to-test------
----------CHECK 4. Throttle ----------------------
-------OFF 5. Pilot holds two fingers
vertically-P/C OPENS GTC AIR VALVE 6.
Five-percent RPM, throttle--------IGN 7.
Fifteen-percent RPM, throttle-----IDLE 8. At
forty-five-percent RPM, three fingers held
vertically------P/C CLOSE GTC AIR VALVE AND
REMOVE STARTER AIR HOSE 9. Stabilized idle RPM,
pilot holds four fingers vertically-------P/C
SELECTS INTERNAL ELECTRICAL POWER, SECURES
POWER UNIT, REMOVES ELECTRICAL CABLE, SECURES
ACCESS PANEL
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FLIGHT CREW CHECKLIST REVIEW

• START MALFUNCTIONS
• ENGINE FIRE (GROUND/FLIGHT)
• HIGH/LOW ALTITUDE ENGINE FAILURE AND AIRSTARTS
  Note the procedural differences.
• CHUGS AND STALLS
• OIL PRESSURE AND QUANTITY MALFUNCTIONS
• FUEL CONTROL MALFUNCTION
• THROTTLE LINKAGE FAILURE

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START MALFUNCTIONS   HUNG   HOT   WET   FALSE
START   1. Throttle OFF (DO NOT ACTUATE
IGNITERS) 2. Engine starter CONTINUE
CRANKING. (15-20 SECS) 3. Engine start
air CUT-OFF
1N
2N
3N
4N
5C
6N
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CLEARING ENGINE
To clear engine of excess fuel after abnormal
starts 1. Throttle-----------------------OFF
(DO NOT ACTIVATE IGNITERS) 2. Continue to crank
engine with starter for 20 seconds. 3. Engine
start air --------------OFF
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1N
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TAKEOFF EMERGENCIES
ENGINE FAILURE DURING TAKEOFF
Throttle----------------------------ENSURE AT
MILITARY 1. Confirmed engine failure---ABORT Abor
t impossible-----------------DECIDE TO EJECT OR
REMAIN WITH AIRCRAFT
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IN-FLIGHT EMERGENCIES
LOW ALTITUDE LOSS OF THRUST/FLAMEOUT
1. Commence------------------------------------ZO
OM CLIMB 2. Throttle-----------------------------
-----------RETARD 3. Fuel Control----------------
------------------MANUAL 4. Emergency
Generator-----------------------EXTEND If
thrust is not regained immediately, proceed as
follows 5. Throttle-----------------------------
-----------IGN then IDLE 6. Throttle------------
---------------------ADVANCE CAUTIOUSLY and
ascertain restoration of thrust 7. If engine
fails to respond and peak altitude at zoom
apex is LESS THAN 5000 FEET-------------------
-EJECT If time and altitude permit
establish glide----------------------------------2
50 KIAS commence-------------------------------
--------AIRSTART
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ENGINE FAILURE
1. Throttle--------------------------------------
---RETARD 2. Fuel Control------------------------
-----------MANUAL If Thrust is not regained,
proceed as follows 3. Throttle------------------
-----------------------OFF 4. Emergency
generator-------------------------EXTEND NOTE Ensu
re NORMAL/BYPASS switch NORMAL 5. Check
for---------------------------------------FIRE
IF fire exists or existed-----------------------
NO RESTART
IF NO FIRE proceed as follows 6.
Descend---------------------------------BELOW
30,000 FT 7. Establish glide----------------------
----250 KIAS 8. Throttle--------------------------
--------IGN then IDLE 9. Monitor------------------
----------------RPM EGT 10. IF no relight
(within 45 seconds).--IGN then IDLE
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FUEL CONTROL MALFUNCTION
1. Throttle--------------------------------MATCH
WITH RPM 2. Fuel control switch------------------M
ANUAL 3. Throttle--------------------------------A
DVANCE SLOWLY TO DESIRED POWER SETTING
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ENGINE FIRE IN FLIGHT WITH OTHER INDICATIONS
1. Throttle-----------------------OFF 2. Manual
fuel control---------EMER OFF shutoff control
lever 3. Emergency generator-------EXTEND 4.
If fire persists----------------EJECT
IMMEDIATELY 5. If fire goes out---------------DO
NOT RELIGHT ENGINE BUT PERFORM CONTROLLED
EJECTION
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ENGINE FIRE IN FLIGHT WARNING LIGHT ONLY
1. Throttle-------------------------------MIN
FOR FLIGHT 2. Land as soon as possible.
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ABNORMAL OIL PRESSURE
1. Less than 1 minute-------PERMISSIBLE 2. If
oil pressure remains out of limits (high or low)
more than 1 Minute---------Maintain (80-82 A-4,
86 - 88 TA-4) ENGINE RPM UNTIL LANDING ASSURED
OR UNTIL DECISION TO EJECT IS MADE 3. USE
PRECAUTIONARY APPROACH.
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OIL LOW LIGHT ON
1. Abort flight, land at nearest suitable
landing facility. 2. Use Precautionary Approach
for landing
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THROTTLE LINKAGE FAILURE
1. Do not manipulate throttle. 2. Determine
thrust available, be alert for slow RPM
decay. 3. Fly PA or STA, maintain 180 KIAS
minimum.