(4)  
Remove the flight director and autopilot photocells and repeat steps (2) and (3) with BRT-DIM-TEST switch at DIM. Lights should be dim but readable.

(5)  
Replace photocells and leave BRT-DIM-TEST switch at DIM.

(6)  
Press face of F/D and A/P APD and at the same time, shade autopilot and flight director photocells. Check that same indications as steps (2) and (3) occur and, shading photocells causes brightness of lights to vary.

(7)  
Switch BRT-DIM-TEST switch to TEST. Check that all APD annunciators turn off.

(8)  
Position BRT-DIM-TEST switch to BRT.

B.  HDG Mode Tests
(1) 
 Captain's Side:

(a)  
Set PITCH CMD knob on mode selector to 0 and ALT HOLD switch to OFF.

(b)  
For captain's instruments, set mode selector in HDG position. Set heading marker on HSI to airplane heading. Tilt VG-1 to align V-bars on ADI with miniature airplane symbol. Allow 30 seconds for V-bars to stabilize. Check that tilt table reads 0 ±3 degrees in both pitch and roll.

(c)  
Set heading marker to angle 10 degrees greater than airplane heading. Check that V-bars rotate to right and return to zero command with 15 ±5 degrees right roll of VG-1.

(d)  
Set heading marker to angle 90 degrees greater than airplane heading. Check that V-bars return to zero command with 28. ±5 degrees right roll of VG-1.

(e)  
Repeat steps (c) and (d) for less than airplane heading and left roll. Return VG-1 to level and heading marker to airplane heading. Check that V-bars indicate zero command within 0 ±3 degrees.

(2)  
F/O's Side:

(a)  For F/O's instruments, repeat step (1) using VG-2 instead of VG-1.

(3)  
Repeat step (1) with VERTICAL GYRO transfer switch set to 1 ON AUX, using VG-AUX, and check for same results.

(4)  
Repeat step (2) with VERTICAL GYRO transfer switch set to 2 ON AUX, using VG-AUX, and check for same results.

(5)  
Return VERTICAL GYRO transfer switch to NORMAL.

(6)  
Rotate synch knob on each RMI and check that capt's ADI V-bars respond to F/O's RMI sync knob and that F/O's ADI V-bars respond to capt's RMI sync knob.

(7)  
Set COMPASS transfer switch to BOTH ON 2 and rotate the synch knob on F/O's RMI. Check that both V-bars respond.

(8)  
Set COMPASS transfer switch to BOTH ON 1 and rotate the synch knob on capt's RMI. Check that both V-bars respond.

(9)  
Return COMPASS transfer switch to NORMAL and resynchronize compass systems. Check that both V-bars indicate zero command.

5C8 
34-26-0 Page 504  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  Jan 20/83 

C.  Pitch Command Mode Tests
(1)  Capt's Side and F/O's Sides:
(a)  
Set PITCH CMD knob CW 15 degrees. Check that V-bars indicate a 9 ±3 degrees pitch up command and return to zero command with 15 ±3 degrees pitch up tilt of VG-1.

(b)  
Level VG-1.

(c)  
Rotate pitch knob CCW to obtain a 10 degree pitch down command. Check that V-bars indicate a 6 ±2 degree pitch down command and return to zero command with 10 ±2 degrees pitch down tilt of VG-1.

(d)  
Set PITCH CMD knob to zero and level VG.

(e)  
Repeat steps (a) thru (d) using VG-AUX for Capt's side with VERTICAL GYRO transfer switch set to 1 ON AUX.

(f)  
Repeat steps (a) thru (d) using VG-AUX for F/O's side with VERTICAL GYRO transfer switch set to 2 ON AUX.

(g)  
Return VERTICAL GYRO transfer switch to NORMAL.

D.  ALT HOLD Mode Test
(1)  
Capt's Side:

(a)  
Set static pressure altitude to 2000 feet and set ALT HOLD switch on flight director mode selector to ON. Check that V-bars indicate zero degrees command with 0 ±3 degrees of VG-1 tilt and for green ALT HOLD APD annunciator.

CAUTION:  DAMAGE MAY RESULT FROM MISUSE OF AIR PRESSURE. RATE OF ALTITUDE CHANGE MUST NOT EXCEED 5000 FEET PER MINUTE AND CHANGE OF STATIC PRESSURE ALTITUDE MUST NOT EXCEED 1000 FEET AFTER ALT HOLD SWITCH IS ON. REFER TO 34-11-0 FOR CAUTIONS AND INSTRUCTIONS ON APPLYING STATIC PRESSURE ALTITUDE.

(b)  
Rotate PITCH CMD knob both clockwise and counterclockwise and return to zero. Check V-bars do not respond to knob rotation.

(c)  
Slowly reduce static pressure to increase altitude to 2250 feet. Check that V-bars indicate 5 .2 degrees pitch down command.

(d)  
Slowly increase static pressure to increase1750 feet. Check that V-bars indicate 5 .2 degrees pitch up command.

(e)  
　
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