(2)
Slide clamps off flexible duct.
(3)
Work ends of flexible duct off beads of turbofan and exhaust louver elbow and remove duct.
C. Loosen clamp at forward end of turbofan and slide clamp onto ram air duct.
D. Remove outboard mounting bolt and allow turbofan to slowly rotate down on inboard mounting bolt.
E. Remove inboard mounting bolt and remove turbofan from airplane.
4. Install Turbofan
A. Check that forward V-clamp is on ram air duct.
B. Raise turbofan into position in airplane and install inboard mounting bolt.
C. Rotate turbofan up and install outboard mounting bolt.
500
Nov 15/67 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 21-52-61 Page 401
Turbofan Installation 500
21-52-61Page 402 Figure 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. May 15/68
D. Assure proper alignment of turbofan lip with duct lip and install V-clamp.
NOTE: Adjust rods as necessary for alignment.
E. Check that clamps are loosely placed on turbofan outlet and elbow inlet and install flexible duct.
F. Slide clamps in position over flexible duct and tighten.
G. Install turbine air duct.
H. Service the turbofan. Refer to Turbofan - Unit Servicing.
I. Start air conditioning system and check for leaks at all joints and clamps.
J. Stop air conditioning system and close air conditioning equipment bay doors.
500
Nov 15/67 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 21-52-61 Page 403
TURBOFAN VALVE - REMOVAL/INSTALLATION
1. Remove Turbofan Valve (Fig. 401)
A. Check that LEFT or RIGHT turbofan valve circuit breaker on P6-4 load control center is open.
B. Open air conditioning bay access door.
C. Remove electrical connectors.
D. Remove bonding jumper.
E. Disconnect line leading to purge valve from turbofan valve.
F. Remove clamps.
G. Remove valve.
2. Install Turbofan Valve
A. Install valve body with clamps.
B. Connect line from purge valve to turbofan valve.
C. Install bonding jumper.
D. Install electrical connectors.
E. Check that air conditioning PACK switch is at OFF and turbofan valve is closed.
F. Close LEFT or RIGHT turbofan valve circuit breaker.
G. Provide electrical power.
H. Pressurize pneumatic system by a ground pneumatic cart.
I. Move Isolation Valve switch to OPEN to provide air to left turbofan valve.
J. Place air conditioning PACK switch to ON, and check that turbofan valve opens.
K. Place air conditioning PACK switch to OFF, and check that turbofan valve closes.
L. Move ISOLATION VALVE switch to CLOSE.
M. Remove pneumatic system pressure if no longer required.
N. Remove electrical power if no longer required.
O. Close air conditioning bay access door.
501
Feb 20/84 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 21-52-71 Page 401
Turbofan Valve Installation 500
21-52-71Page 402 Figure 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. May 15/68
RAM AIR INLET CONTROL CABLES - ADJUSTMENT/TEST
1. Ram Air Inlet Control Cable Adjustment
A. General
(1) Ram air inlet control cable adjustment is applicable to either the right or left ram air inlet control cables. If desirable both cable assemblies may be adjusted at the same time.
B. Equipment and Materials
(1)
Tensiometer - 0 to 100 pound capacity
(2)
Rigging Pins - (2) 5/16 diameter, approximately 6 inches long
NOTE: If right and left systems are adjusted at the same time, four rigging pins will be required.
(3)
Shop Aid (Fig. 501)
C. Prepare Ram Air Inlet Control Cables for Adjustment (Fig. 501)
(1)
Open ram air duct access door.
(2)
Remove access door from fairing panel.
(3)
Ensure actuator is in full retract position.
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