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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
GUN ALL 78-31-00
Page 25
D633A101-GUN Feb 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
78-31-00-007
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
these T/R halves open at 55 degrees. Refer to the AMM for
procedures.
WARNING: MAKE SURE YOU DO THE DEACTIVATION
PROCEDURE FOR THE THRUST REVERSER. IF
THE THRUST REVERSER IS NOT LOCKED, IT CAN
ACCIDENTALLY OPERATE AND CAUSE INJURY
TO PERSONS AND DAMAGE TO EQUIPMENT.
WARNING: DO NOT OPERATE THE OPENING SYSTEM FOR
THE THRUST REVERSER IF THE WIND VELOCITY
IS MORE THAN 40 KNOTS. THE OPENING SYSTEM
FOR THE THRUST REVERSER CAN HAVE A
FAILURE IN LARGE WINDS WHICH CAN CAUSE
INJURY TO PERSONS AND DAMAGE TO
EQUIPMENT.
WARNING: IF YOU USE THE MANUAL PROCEDURE TO OPEN
THE THRUST REVERSER AGAIN AND AGAIN, THE
HYDRAULIC FLUID FOR THE POWER OPENING
SYSTEM CAN DECREASE. THIS WILL DECREASE
THE SNUBBING ACTION. IF THE HYDRAULIC
FLUID IN THE POWER OPENING SYSTEM
DECREASES, THE REVERSER HALF CAN CLOSE
TOO FAST. THIS CAN CAUSE INJURY TO
PERSONS AND DAMAGE TO EQUIPMENT. YOU
MUST OPEN AND CLOSE THE REVERSER HALVES
REGULARLY WITH THE PUMP METHOD TO
REPLACE THE HYDRAULIC FLUID.
CAUTION: MAKE SURE THE ADJACENT FAN COWL PANEL IS
FULLY OPEN BEFORE YOU OPEN THE REVERSER
HALF. IF THE ADJACENT FAN COWL PANEL IS
NOT FULLY OPEN, YOU CAN DAMAGE IT WHEN
YOU OPEN THE REVERSER HALF.
CAUTION: DO NOT CAUSE THE THRUST REVERSER SLEEVE
TO MOVE TO THE DEPLOYED POSITION WHEN
THE THRUST REVERSER IS OPEN. THIS CAN
CAUSE DAMAGE TO THE TRANSLATING SLEEVE
AND THE LEADING EDGE FLAP.
THRUST REVERSER - THRUST REVERSER OPENING ACTUATOR
EFFECTIVITY
GUN ALL 78-31-00
Page 26
D633A101-GUN Feb 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
78-31-00-007
THRUST REVERSER - THRUST REVERSER OPENING ACTUATOR
THRUST REVERSER - THRUST REVERSER OPENING ACTUATOR
EFFECTIVITY
GUN ALL 78-31-00
Page 27
D633A101-GUN Feb 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
78-31-00-007
Purpose
The krueger flap deflector keeps separation between the
inboard leading edge (krueger) flap and the inboard thrust
reverser outer skin during these conditions:
* The inboard leading edge flap in the extend position
* Anytime the T/R is out of the stow position.
The fairing gives an aerodynamic surface for airflow around the
top of the thrust reverser.
Location
The krueger flap deflector is on the inboard T/R half of each
engine. The deflector is near the top of the T/R half. Bolts on the
inside of the translating sleeve hold the deflector in position.
You move the translating sleeve aft to get access to these bolts.
The fairing is just aft of the deflector. Bolts attach the fairing to
the T/R half structure.
THRUST REVERSER - KRUEGER FLAP DEFLECTOR AND FAIRING
EFFECTIVITY
GUN ALL 78-31-00
Page 28
D633A101-GUN Feb 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
CFM56 ENGINES (CFM56-7) 737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
78-31-00-008
THRUST REVERSER - KRUEGER FLAP DEFLECTOR AND FAIRING
THRUST REVERSER - KRUEGER FLAP DEFLECTOR AND FAIRING
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