TM 55-1520-240-T
1-1 FAILURE SYMPTOM LIST (Continued)
1-1
SYMPTOM
TASK
CHAPTER 7 (Continued)
POWER STEERING/SWIVEL LOCK MODULE DOES NOT
MAINTAIN PRESSURE WITH APU OFF
7-5.4
WHEEL BRAKES SYSTEM
BRAKE PRESSURE BLEEDS DOWN WITHIN 8 HOURS WITH
PARKING BRAKE ON
7-6.3
BRAKES WILL NOT RELEASE
7-6.3
ONE OR MORE WHEEL BRAKES WILL NOT RELEASE,
WHEELS DO NOT TURN FREELY
7-6.3
PARK BRAKE ON CAUTION LIGHT DOES NOT COME ON
7-6.3
PARK BRAKE ON CAUTION LIGHT WILL NOT GO OUT
7-6.3
PARKING BRAKE HANDLE WILL NOT LOCK
7-6.3
RIGHT OR LEFT BRAKES DO NOT COME ON WHEN COPI-
LOT'S BRAKE PEDALS ARE PRESSED
7-6.3
RIGHT OR LEFT BRAKES DO NOT COME ON WHEN PILOT'S
BRAKE PEDALS ARE PRESSED
7-6.3
UNABLE TO APPLY BRAKES THREE TIMES ON BRAKE AC-
CUMULATOR PRESSURE
7-6.3
ENGINE HYDRAULIC STARTING SYSTEM
NO. 1 OR NO. 2 ENGINE DOES NOT MOTOR (HYDRAULIC SYSTEM)
7-7.3
NO. 1 OR NO. 2 ENGINE KEEPS MOTORING WHEN ENGINE
START SWITCH SET TO OFF
7-7.3
APU HYDRAULIC STARTING SYSTEM
APU DOES NOT MOTOR
7-8.3
APU MOTORS BUT DOES NOT START, ESU BITE INDICATES
OR THEN (HYDRAULIC FAULT)
7-8.3
APU START ACCUMULATOR GAGE DOES NOT INDICATE AT
LEAST 3000 PSI
7-8.3
INTEGRATED LOWER CONTROL ACTUATOR
INTEGRATED LOWER CONTROL ACTUATOR (ILCA) FAILS
TEST 1 OR TEST 2 (EXTENSIBLE LINK TRANSDUCER NULL
VOLTAGE TEST (SPARE) )
7-9.2
INTEGRATED LOWER CONTROL ACTUATOR (ILCA) FAILS
TEST 3 (CROSS EXTENSIBLE LINK TRANSDUCER NULL
VOLTAGE TEST (SPARE) )
7-9.2
INTEGRATED LOWER CONTROL ACTUATOR (ILCA) FAILS
TEST 4, 5, 7, 11, 13
7-9.2
INTEGRATED LOWER CONTROL ACTUATOR (ILCA) FAILS
TEST 6 (EXTENSIBLE LINK AUTHORITY TEST (SPARE) )
7-9.2
SYMPTOM
TASK
INTEGRATED LOWER CONTROL ACTUATOR (ILCA) FAILS
TEST 8 (STABILITY TEST (SPARE) )
7-9.2
INTEGRATED LOWER CONTROL ACTUATOR (ILCA) FAILS
TEST 9 (EXTENSIBLE LINK CENTERING SPRINGS TEST (SPARE) )
7-9.2
INTEGRATED LOWER CONTROL ACTUATOR (ILCA) FAILS
TEST 10 (PROOF PRESSURE TEST (ALL) )
7-9.2
INTEGRATED LOWER CONTROL ACTUATOR (ILCA) FAILS
TEST 12 (VALVE JAM INDICATOR TEST (ALL) )
7-9.2
INTEGRATED LOWER CONTROL ACTUATOR (ILCA) FAILS
TEST 14 (RELIEF VALVE TEST (ALL) )
7-9.2
INTEGRATED LOWER CONTROL ACTUATOR (ILCA) FAILS
TEST 15 OR TEST 16
7-9.2
HYDRAULIC HANDPUMP
HYDRAULIC HANDPUMP FAILS FLUID DISPLACEMENT TEST
7-10.5
HYDRAULIC HANDPUMP FAILS HANDLE FORCE TEST
7-10.4
HYDRAULIC HANDPUMP FAILS INTEGRITY PRESSURE TEST
OR INTERNAL LEAKAGE TEST
7-10.2
HYDRAULIC HANDPUMP FAILS PRESSURE ADJUSTMENT
TEST
7-10.3
CHAPTER 8
PITOT STATIC SYSTEM
AIMS ALT CIRCUIT BREAKER WILL NOT STAY CLOSED
8-1.4
NO HEAT FELT ON LEFT OR RIGHT PITOT TUBE, PITOT
SWITCH AT ON
8-1.4
NO HEAT FELT ON LOWER RIGHT OR LOWER LEFT SIDE-
SLIP PORTS
8-1.4
NO HEAT FELT ON UPPER RIGHT OR UPPER LEFT SIDESLIP
PORTS
8-1.4
NO. 1 OR NO. 2 PITOT SYSTEM LEAKS
8-1.4
NO. 1 OR NO. 2 SIDESLIP SYSTEM LEAKS
8-1.4
PILOT'S OR COPILOT'S ALTIMETER VIBRATOR DOES NOT
OPERATE
8-1.4
PITOT HEAT CIRCUIT BREAKER WILL NOT STAY CLOSED
8-1.4
PITOT STATIC SYSTEM LEAKS
8-1.4
YAW PORT HEAT CIRCUIT BREAKER WILL NOT STAY
CLOSED
8-1.4
GAS PRODUCER TACHOMETER SYSTEM
SYMPTOM
TASK
NO. 1 GAS PRODUCER TACHOMETER READS 0 PERCENT
RPM WHEN NO. 1 ENGINE IS MOTORED
8-2.3
NO. 2 GAS PRODUCER TACHOMETER READS 0 PERCENT
RPM WHEN NO. 2 ENGINE IS MOTORED
8-2.3
ENGINE OIL PRESSURE INDICATING SYSTEM
ENGINE OIL PRESS CIRCUIT BREAKER DOES NOT STAY CLOSED
8-3.3
ENGINE OIL PRESSURE INDICATOR DOES NOT INDICATE 0
8-3.3
NO. 1 ENGINE OIL PRESS INDICATOR DOES NOT INDICATE
20 PSI MINIMUM OR POINTER FLUCTUATES MORE THAN 5 PSI
8-3.3
NO. 2 ENGINE OIL PRESS INDICATOR DOES NOT INDICATE
20 PSI MINIMUM OR POINTER FLUCTUATES MORE THAN 5 PSI
8-3.3
ENGINE OIL TEMPERATURE INDICATING SYSTEM
ENGINE OIL TEMP CIRCUIT BREAKER DOES NOT STAY CLOSED
8-4.3
NO. 1 ENGINE OIL TEMPERATURE INDICATOR INDICATION
IS NOT WITHIN 10C OF FAT INDICATOR
8-4.3
NO. 2 ENGINE OIL TEMPERATURE INDICATOR INDICATION
IS NOT WITHIN 10C OF FAT INDICATOR
8-4.3
PTIT AND EMERGENCY POWER INDICATING SYSTEM
NO. 1 ENGINE EMERGENCY POWER TIMER DOES NOT OP-
ERATE WHEN NO. ENGINE PTIT INDICATION IS 890C TO
910C (WITHOUT 74 )
8-5.3
NO. 1 ENGINE PTIT INDICATOR DOES NOT INDICATE IN
GREEN BAND (WITHOUT 74 )
8-5.3
NO. 1 OR NO. 2 ENGINE EMERGENCY POWER FLAG INDI-
CATOR REMAINS BLACK WHEN NO. 1 OR NO. 2 ENGINE
PTIT INDICATION IS 890C TO 910C (WITHOUT 74 )
8-5.3
NO. 1 OR NO. 2 ENGINE EMERGENCY POWER FLAG INDI-
CATOR WILL NOT RESET TO BLACK, FLAG RESET SWITCH
AT RESET (WITHOUT 74 )
8-5.3
NO. 1 OR NO. 2 ENGINE EMERGENCY POWER LIGHTS WILL
NOT COME ON WHEN PRESSED TO TEST (WITHOUT 74 )
8-5.3
NO. 2 ENGINE EMERGENCY POWER TIMER DOES NOT OP-
ERATE WHEN NO. 2 ENGINE PTIT INDICATION IS 890C TO
910C (WITHOUT 74 )
8-5.3
NO. 2 ENGINE PTIT INDICATOR DOES NOT INDICATE IN
GREEN BAND (WITHOUT 74 )
8-5.3
PILOT'S AND COPILOT'S EMERGENCY POWER LIGHTS DO
NOT COME ON WHEN NO. 1 OR NO 2 ENGINE PTIT INDICA-
TION IS 890C TO 910C (WITHOUT 74 )
8-5.3
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Change 17 1-7
