(g)
Position APU master switch to ON. Do not go to start.
(h)
After air inlet door is fully open, position BATTERY SWITCH to OFF and placard.
(i)
Rotate set screw inward until contact is made with flap lever, then turn in additional 1-1/2 turns.
(j)
Remove placard from BATTERY SWITCH and position switch to ON.
(k)
Cycle door to closed position and then open position. Check flap for smooth operation.
(l)
Recheck air inlet door alignment per par. 3.
3. APU Air Inlet Door Test
A. Air Inlet Door Alignment Test
(1) Test Air Inlet Door Alignment
(a)
Measure door alignment when door is closed. Refer to view 3, figure 501.
(b)
If door alignment is not within limits, adjust per paragraph 2.
(c)
Position BATTERY SWITCH to OFF and placard.
(d)
Position APU master switch to ON.
WARNING: SERIOUS INJURY CAN RESULT WHILE MEASURING DOOR ALIGNMENT IF BATTERY SWITCH IS "ON" AND APU MASTER SWITCH IS INADVERTENTLY POSITIONED TO "OFF."
(e)
Measure door alignment when door is fully open. Refer to view 2, figure 501.
(f)
If door alignment is not within limits, adjust per paragraph 2.
(g)
Cycle actuator to door open and closed position to check that there is no mechanical binding.
(h)
Position BATTERY SWITCH to ON and remove placard.
(i)
Position APU master switch to OFF.
May 15/78 49-15-0
Page 507
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
APU AIR INLET DOOR – SERVICING
1. General
A. This section covers the removal and lubrication of the vortex generator flap assembly hinge pin. No other disassembly is required.
2. Equipment and Material
A. Grease - BMS 3-24 (AMM 20-30-21)
B. Spring Pin -MS16562-194
C. Primer - BMS 10-11, Type I (AMM 20-30-02)
3. Prepare to Lubricate Vortex Generator Hinge Pin
A. Position BATTERY SWITCH and APU START SWITCH to OFF and placard that APU maintenance is "IN WORK".
B. Open the circuit breaker on M280 module -APU accessory unit on E3-3 electrical shelf.
C. Gain access to APU inlet door and vortex generator on aft RH side of airplane.
4. Lubricate Vortex Generator Hinge Pin (Fig. 301)
A Use a hammer, or rubber mallet, and a 1/16 inch diameter drift to carefully tap the spring pin from the hinge pin.
(1)
Remove the spring pin that holds the vortex generator and the hinge pin in their positions.
(2)
Discard the spring pin.
B. Remove the hinge pin from vortex generator.
C. Lubricate O.D. of hinge pin and I.D.of flap and vortex generator hinge bushings.
D. Align flap and vortex generator hinge bushings and insert hinge pin.
E. Align spring pin hole of hinge pin with spring pin hole in vortex generator hinge tab.
F. Install a new spring pin.
NOTE: Prior to installation of spring pin, apply primer to pin and pin hole.
5. Restore Airplane to Normal Configuration
A. Close circuit breaker on M280 module -APU accessory unit on E3-3 electrical shelf.
554
May 01/03 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 49-15-22 Page 301
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APU Air Inlet Door Installation 554
49-15-22Page 302 Figure 301 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Jan 20/83
APU AIR INLET DOOR - REMOVAL/INSTALLATION
1. General
A. This section covers the removal and installation of the APU air inlet door. The air inlet door and hinge assembly (forward part of the air diffuser duct) are removed as a unit. The hinge assembly can then be removed from the door. Installation of the door is achieved by following the reverse procedure for the removal.
2. Equipment and Material
A. Grease - BMS 3-24 (Ref 20-30-21)
3. Prepare to Remove Air Inlet Door
A. Position BATTERY switch to OFF and placard.
B. Open stabilizer trim access door 3701 to gain access to air inlet door actuator.
4. Remove Air Inlet Door (Fig. 401)
A. Remove nuts, washers and bolts connecting pushrod bearings to actuator arms.
B. Remove nut from inboard end of vortex generator flap pushrod.
C. Remove screws attaching hinge assembly to airplane structure. Access to screws is gained from outside of airplane.
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