1-1 FAILURE SYMPTOM LIST (Continued)
S Y M P T OM
TASK
CHAPTER 4 (Continued)
ENGINE START AND IGNITION (Continued)
NO. 2 ENGINE DOES NOT MOTOR (GAS
PRODUCER TACHOMETER DOES NOT
INDICATE 10 TO 15% N1)
NO. 2 ENGINE DOES NOT START (ENGINE
FUEL SYSTEM FAILURE)
NO. 2 ENGINE DOES NOT START (ENGINE
IGNITION SYSTEM FAILURE)
NO. 2 ENGINE MOTORS NORMALLY BUT
DOES NOT START
GAS PRODUCER CONTROL SYSTEM (N1)
ENGINE NO. 1 OR NO. 2 COND CONT
CIRCUIT BREAKER WILL NOT STAY
CLOSED
NO. 1 ENGINE FUEL CONTROL POINTER
NOT AT GROUND BAND
NO. 1 ENGINE CONT CAPSULE DOES NOT
COME ON
NO. 1 ENGINE OR NO. 2 ENGINE FUEL
CONTROL POINTER DOES NOT MAKE
CONTACT WITH STOP OR BROWN BAND IS
NOT PARTIALLY COVERED
4-4.4
4-4.4
4-4.4
4-4.4
4-5.3
4-5.3
4-5.3
4-5.3
NO. 1 OR NO. 2 ENG N1 CONT CAPSULE IS LIT 4-5.3
NO. 2 ENGINE FUEL CONTROL POINTER
NOT AT GROUND BAND
NO. 2 ENGINE N1 CONT CAPSULE DOES
NOT COME ON
POWER TURBINE CONTROL SYSTEM — (N2)
NO. 1 EM ERG ENG TRIM CIRCUIT BREAKER
WILL NOT STAY CLOSED
NO. 1 ENGINE TRIM & TIMER CIRCUIT
BREAKER WILL NOT STAY CLOSED
NO. 1 ENGINE TRIM CIRCUIT BREAKER
WILL NOT STAY CLOSED
GO TO NEXT PAGE
Change 1
1-2.2
4-5.3
4-5.3
4-6.3
4-6.3
4-6.3
S Y M P T OM
TASK
NO. 1 ENGINE FUEL CONTROL POINTER
DOES NOT MOVE OR MOVES BUT STOPS
OUTSIDE OF 13° TO 21° ON PROTRACTOR
(DECREASE SELECTED)
NO. 1 ENGINE FUEL CONTROL POINTER
DOES NOT MOVE WHEN COPILOT’S NO. 1
ENGINE BEEP TRIM SWITCH SET TO RPM
DECREASE
NO. 1 ENGINE FUEL CONTROL POINTER
DOES NOT MOVE WHEN COPILOT’S NO. 1
ENGINE BEEP TRIM SWITCH SET TO RPM
INCREASE
NO. 1 ENGINE FUEL CONTROL POINTER
DOES NOT MOVE WHEN EMERGENCY
ENGINE TRIM 1 SWITCH SET TO DEC
NO. 1 ENGINE FUEL CONTROL POINTER
DOES NOT MOVE WHEN EMERGENCY
ENGINE TRIM 1 SWITCH SET TO INC
NO. 1 ENGINE FUEL CONTROL POINTER NOT
BETWEEN 13° AND 21° ON PROTRACTOR
AT BEGINNING OF OPERATIONAL CHECK
NO. 1 ENGINE POWER TURBINE LEVER
DOES NOT MOVE OR MOVES BUT DOES NOT
CONTACT STOP
NO. 2 EMERG ENG TRIM CIRCUIT
BREAKER WILL NOT STAY CLOSED
NO. 2 ENGINE TRIM CIRCUIT BREAKER
WILL NOT STAY CLOSED
NO. 2 ENGINE TRIM & TIMER CIRCUIT
BREAKER WILL NOT STAY CLOSED
NO. 2 ENGINE FUEL CONTROL POINTER
DOES NOT MOVE OR MOVES BUT STOPS
OUTSIDE OF 13° TO 21° ON PROTRACTOR
(DECREASE SELECTED)
NO. 2 ENGINE FUEL CONTROL POINTER
DOES NOT MOVE WHEN COPILOT’S NO. 1
AND 2 ENGINE BEEP TRIM SWITCH SET TO
RPM DECREASE
4-6.3
4-6.3
4-6.3
4-6.3
4-6.3
4-6.3
4-6.3
4-6.3
4-6.3
4-6.3
4-6.3
4-6.3
TM 55-1520-240-T
1-1
S Y M P T O M
TASK
NO. 2 ENGINE FUEL CONTROL POINTER
DOES NOT MOVE WHEN COPILOT’S NO. 1
AND 2 ENGINE BEEP TRIM SWITCH SET TO
RPM INCREASE
4-6.3
NO. 2 ENGINE FUEL CONTROL POINTER
DOES NOT MOVE WHEN EMERGENCY
ENGINE TRIM 2 SWITCH SET TO DEC
4-6.3
NO. 2 ENGINE FUEL CONTROL POINTER
DOES NOT MOVE WHEN EMERGENCY
ENGINE TRIM 2 SWITCH SET TO INC
4-6.3
NO. 2 ENGINE FUEL CONTROL POINTER NOT
BETWEEN 13° AND 210 ON PROTRACTOR
AT BEGINNING OF OPERATIONAL CHECK
4-6.3
NO. 2 ENGINE POWER TURBINE LEVER
DOES NOT MOVE OR MOVES BUT DOES NOT
CONTACT STOP (INCREASE SELECTED)
4-6.3
ENGINE ACCESSORY GEARBOX CHIP DETECTORS
ENG CHIP DET CAPSULE DOES NOT COME
ON AND ENGINE CHIP DETECTOR
INDICATOR DOES NOT CHANGE
DISPLAY WHEN DETECTOR SHORTED
4-7.3
NO. 1 AND NO. 2 ENGINE CHIP DETECTOR
INDICATOR DISPLAY IS ALL BLACK
WHEN GND SWITCH SET TO TEST
4-7.3
NO. 1 ENG CHIP DET CAPSULE DOES NOT
COME ON WHEN GND SWITCH SET TO TEST 4-7.3
NO. 1 OR NO. 2 ENGINE CHIP DETECTOR
INDICATOR DISPLAYS BLACK-AND
WHITE FAN, ENG CHIP DET CAPSULE OUT 4-7.3
NO. 1 OR NO. 2 ENG CHIP DET CAPSULE
IS LIT
4-7.3
NO. 2 ENG CHIP DET CAPSULE DOES NOT
COME ON WHEN GND SWITCH SET TO TEST 4-7.3
CHAPTER 5
ROTOR BLADE TRACKING AND BALANCING
SYSTEM
NO FWD LATERAL OR AFT LATERAL
INDICATION ON IPS INDICATOR
5-2.3
