(h)
connect fuel feed line coupling to flexible fuel feed line.
NOTE: Do not attach flexible shroud until fuel line leak check has been performed.
(4)
Pressurize APU fuel feed line and check for leaks.
(a) Perform steps 2.D.(8)(a) through 2.D.(8)(g).
(5)
Slide flexible shroud over aft shroud "section C" and install hose clamp.
(6)
Pressurize APU fuel line shroud and check for leaks.
(a) Perform steps 2.D.(10)(a) through 2.D.(10)(c) to leak check shroud.
D. Return Airplane to Normal Configuration
(1) Determine if there is any further need for electrical power on airplane; if not, remove electrical power.
500
28-22-91 Page 410 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Oct 20/84
ENGINE FUEL SHUTOFF VALVE SWITCH - REMOVAL/INSTALLATION
1. Prepare to Remove Engine Fuel Shutoff Valve Switch
A. Open fuel shutoff and fuel shutoff fire shutdown breakers for both engines on P6-2 circuit breaker panel.
B. Position start levers in CUTOFF detent.
C. Remove lower forward panels (both sides) from pilots' control stand.
NOTE: Fuel shutoff valve switches are mounted on brackets in pilots' control stand. There are two switches, one for each start lever. No. 1 start lever switch is accessible from the LEFT side of the pilots' control stand. No. 2 start lever fuel shutoff valve switches' accessibility is from the RIGHT side of the pilots' control stand.
2. Remove Engine Fuel Shutoff Valve Switch (Fig. 401)
A. Disconnect electrical leads from all switches. Identify leads to facilitate reassembly.
B. Remove two mounting screws per switch. The switch actuator(s) should be retained for reinstallation if serviceable.
NOTE: For some airplanes remove mylar and retain if serviceable, also include in installation.
3. Install Engine Fuel Shutoff Valve Switch (Fig. 401)
A. Position switch, switch actuator in appropriate pilots' control stand.
B. Secure with mounting screws.
C. Connect electrical leads to switch. Refer to Wiring Diagram Manual if necessary.
D. Test fuel shutoff valve switches (Ref 28-22-112 A/T).
Return Airplane to Normal Configuration
A. Install lower forward panel (both sides) on pilots' control stand.
501
Oct 20/84 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 28-22-112 Page 401
Engine Fuel Shutoff Valve Switch Installation 500
28-22-112 Figure 401 Oct 20/84
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
ENGINE FUEL SHUTOFF VALVE SWITCH - ADJUSTMENT/TEST
1. General
A. This section provides an operational test for the engine fuel shutoff valve switch. This switch is not adjustable. There are two fuel shutoff valve switches mounted on brackets in the pilot's control stand. The engine No. 1 start lever fuel shutoff valve switch is accessible from the left side of the pilot's control stand. The engine No. 2 start lever fuel shutoff valve switch is accessible from the right side of the pilot's control stand.
B. The fuel shutoff valve switch test is performed in "power on - dynamic mode". The test consists of positioning the engine start lever successively in fuel shutoff valve open position 1, fuel shutoff valve open position 2 and fuel shutoff valve closed position 2. These positions are verified using the engine fuel shutoff valve position indicating light.
C. The engine start levers must be properly rigged prior to switch test to ensure synchronization of fuel and ignition system operation. Refer to Chapter 76 for engine start lever cable rigging procedures and to Chapter 74 for ignition switches adjustments.
2. Equipment and Materials
A. Tape
3. Prepare for Fuel Shutoff Valve Switch Test (Fig. 501)
A. Apply electrical power (Ref 24-22-0 MP).
B. Verify that engine start switches on overhead panel are positioned to OFF.
C. Position engine start lever in CUTOFF detent.
D. Open FUEL SYSTEMS, ENG 1/ENG 2 SHUTOFF VALVE circuit breakers (P6).
599
Jun 20/84 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 28-22-112 Page 501
Engine Fuel Shutoff Valve Switch Adjustment 533
28-22-112 Figure 501 (Sheet 1) Feb 20/84
Page 502
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
533 Engine Fuel Shutoff Valve Switch Adjustment
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