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You must open the T/R half to inspect the blocker door drag link
connections at the fan duct inner wall.
WARNING: DO THE DEACTIVATION PROCEDURE TO
PREVENT THE OPERATION OF THE THRUST
REVERSER. THE ACCIDENTAL OPERATION OF
THE THRUST REVERSER CAN CAUSE INJURY TO
PERSONS AND DAMAGE TO EQUIPMENT.
WARNING: DO NOT GO INTO THE FAN DUCT WHEN THE
THRUST REVERSER IS IN THE OPEN POSITION.
YOUR WEIGHT CAN CAUSE THE HOLD OPEN ROD
FOR THE THRUST REVERSER TO BREAK. INJURY
TO YOU AND DAMAGE TO THE EQUIPMENT CAN
OCCUR.
CAUTION: DO NOT PULL ON THE BLOCKER DOOR DRAG
LINKS OR USE THE DRAG LINKS FOR SUPPORT.
YOU CAN DAMAGE THE DRAG LINKS.
THRUST REVERSER - BLOCKER DOORS AND BLOCKER DOOR DRAG LINKS
EFFECTIVITY
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CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
78-31-00-006
THRUST REVERSER - BLOCKER DOORS AND BLOCKER DOOR DRAG LINKS
THRUST REVERSER - BLOCKER DOORS AND BLOCKER DOOR DRAG LINKS
EFFECTIVITY
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
78-31-00-006
THIS PAGE IS INTENTIONALLY LEFT BLANK
THRUST REVERSER - BLOCKER DOORS AND BLOCKER DOOR DRAG LINKS
78-31-00
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CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
Purpose
You use the T/R opening actuator to open the T/R cowl (half).
Each engine has two T/R opening actuators. Each actuator
opens its cowl to approximately 45 from the closed position.
Location
Each T/R opening actuator is on the forward face of its T/R cowl.
The upper end of the T/R opening actuator attaches to the T/R
cowl. The lower end attaches to the engine fan frame extension
ring. You open the fan cowls to get access to the T/R opening
actuators.
Physical Description
The T/R opening actuator has these components:
* Hydraulic piston housing
* Rod
* Lock collar mechanism
* Inlet fitting
* Internal snubber assembly.
The rod extends approximately 12 inches (30.5 cm). The inlet
fitting permits you to connect a hand pump necessary to
operate the actuator.
Functional Description
Fluid from the hand pump causes the T/R opening actuator rod
to extend and open the T/R cowl. As the actuator approaches
the full extend position, the lock collar goes into the lock
position. A red band on the rod shows when the collar in the
lock position.
Fluid goes from the opening actuator back to the hand pump
when you close the T/R cowl.
Operation
There are two procedures to open the T/R’s. The pump
procedure is the best. You use the manual procedure only if
no pump is available.
You usually use a hand pump to operate the T/R opening
actuator. As the rod extends, the T/R cowl opens and the lock
collar moves into the lock position. You can see and hear the
lock collar move to the lock position. The red band confirms the
lock collar position. Refer to the pump procedure in the airplane
maintenance manual (AMM).
The AMM also has the manual open and closing procedure.
With the manual procedure, you lift and move the cowl up until
the actuator lock goes into the lock position.
THRUST REVERSER - THRUST REVERSER OPENING ACTUATOR
EFFECTIVITY
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CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
78-31-00-007
Training Information Point
The leading edge flaps can extend and damage the T/R cowls
(halves) when they are in the open (maintenance) position.
Follow the AMM procedures to prevent the leading edge flap
operation before you open the T/R’s.
An actuator safety lock is usually put around the T/R opening
actuator’s rod after the T/R cowl is open. The actuator safety
lock is a safety device and backs up the lock collar if it fails. Two
quick release pins hold the actuator safety lock around the T/R
opening actuator rod.
You use a hold open fitting (special tool) to keep the T/R halves
open during an engine change. This fitting holds the T/R halves
at approximately 45 degrees open. The outboard T/R halves
can open more than 45 degrees. A hold open rod can keep
　
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