TM 55-1520-240-T
4-6.12
4-6.12 NO. 2 ENGINE POWER TURBINE LEVER DOES NOT MOVE
OR MOVES BUT DOES NOT CONTACT STOP (INCREASE
SELECTED) (Continued)
DOES ACTUATOR MOVE IF
COPILOT'S NO 1 AND NO 2
TRIM IS USED?
OPEN RIGHT ELECTRICAL
COMPARTMENT.
OPERATE
PILOTS NO 2 TRIM SWITCH
INC. THEN DEC. CAN YOU
DID THE FUEL CONTROL LEVER
NO
MOVE?
YES
O N E M E R G E N G T R I M
PANEL, SET ENG 2
A U T O / M A N U A L S W TO
MANUAL. SET EM ERG ENG
TRIM 2 SW T0 INC. DID
ACTUATOR
MOVE?
REFER TO TROUBLE SYMPTOM
TASK 4-6.7.
YES
CHECK NO. 2 EM ERG ENG
NO
TRIMCB IS IT OPEN?
DISCONNECT PLUG 103P2
FROM NO 2 ENG CONTROL
BOX OPEN NO 2 ENG ACCESS
DOORS DISCONNECT NO 2
ENG ACTUATOR PLUG CHECK
FOR CONTINUITY BETWEEN
PLUG 103P2 PIN PAND ENG
ACTUATOR PLUG PIN B IS
CONTINUITY PRESENT?
ON EMERG ENG TRIM PANEL
S E T E N G 2 A U T O / M A N U AL
SW TO MANUAL SET EMERG
ENG TRIM 2 SW T0 INC.
DOES FUEL CONTROL LEVEL
CONTACT
STOP?
DISCONNECT ACTUATOR TO
FUEL CONTROL CONNECTION
ROD ROTATE FUEL CONTROL
POINTER CONTACT STOP?
REPLACE NO 2 ENGINE FUEL
CONTROL.
NO
YES
YES
REMOVE PILOT'S FLOOR
PANEL DISCONNECT PILOTS
THRUST GRIP PLUG 300P25
CHECK CONTINUITY BETWEEN
300J25 PIN D AND TB18 TERM
14. IS CONTINUITY PRESENT?
LOCATE OPEN IN WIRE W696-
4622 BETWEEN TB18 TERM 14
AND 300P25. REPAIR OR
REPLACE WIRE AS REQUIRED.
REFER TO TROUBLE SYMPTOM
TASK 4-6.9.
REPLACE NO 2 ENGINE
POWER TURBINE ACTUATOR.
SUBSTITUTE NO. 2 CONTROL
BOX WITH ONE REMOVED
FROM NO. 1 SYSTEM. DOES
FUEL CONTROL POINTER
CONTACT STOP?
LOCATE OPEN IN WIRE W696-
47-22 BETWEEN TB18 TERM 12
AND PLUG 300J25 REPAIR OR
REPLACE WIRE AS REQUIRED.
RIG NO 2 ENGINE N2 SYSTEM
REFER TO TM 55-1520-240-
2
3
CHECK CONTINUITY BETWEEN
300J25 PIN F AND TB18 TERM
6. IS CONTINUITY PRESENT?
CHECK FOR GROUND ON
ENGINE ACTUATOR PLUG PIN
C. IS GROUND PRESENT?
YES
DISCONNECT ENGINE TO
AIRFRAME WIRE HARNESS AT
DISCONNECT SHELF CHECK
FOR GROUND AT PLUG 300J32
PIN 44 IS GROUND PRESENT?
NO
GO TO NEXT
PAGE
4-155
REPLACE ENGINE TO
AlRFRAME
WIRE
HARNESS
REPLACE NO 2 CONTROL BOX
REPLACE PILOT THRUST GRIP
Change 1