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NOTE:  On airplanes with King Radio KNR 6030 navigation units installed, flags retract from view within 4 seconds and remain out of view for as long as self-test is actuated.
7)  Release Up/LT test switch.
8)  Tune appropriate VHF NAV receiver to a VOR frequency. Check ADI glide slope and localizer flags and pointers go out of view.
9)  Prepare AFCS for ADI BITE test by providing electrical power to autopilot, PDC, attitude reference, compass, VHF NAV, LRRA, air data, autothrottle and flight instruments.
10)  Select PDC CDU to autopilot BITE by selecting STBY, pressing RCL, (-) then selecting page 5 (autopilot BITE).
11)  Select NO (ENT) to SYMPTOM/PIREP and GROUND FUNCT to enter VERIFICATION mode (YES), step system through LRU component list to obtain ADI test No. (24 for captain, 74 for first officer).
12)  Perform BITE INITIALIZE steps and required actions as prompted on CDU and perform BITE.
13)  Follow instructions to provide system diagnostic routine if a BITE fails. Replace indicated component and recycle system through BITE until system passes.
14)  Turn off all systems.
15)  Remove electrical power if no longer required. 
5C8 
34-26-11 Page 404  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  Jun 20/85 

 

HORIZONTAL SITUATION INDICATOR - REMOVAL/INSTALLATION
1. General
A.  Two horizontal situation indicators (HSI, CDI, PDI) are installed in the airplane. One is installed on the captain's instrument panel (P1) and one on the first officer's instrument panel (P3).
B.  Each indicator is clamp mounted on the panel and is electrically connected to the flight director system thru multipin connectors on the back.
2.  Remove Indicator
A.  Open COMPASS -1 and INST XFMR-1 (captain's indicator) or COMPASS -2 and INST XFMR-2 (first officer's indicator) circuit breakers on P18 or P6 circuit breaker panel.
B.  Loosen clamp and pull out indicator.
C.  Disconnect electrical connectors.
3.  Install Indicator
A.  Connect electrical connectors, push in indicator, and tighten clamp.
B.  Close circuit breakers opened in step 2.A.
4.  Test Indicator
A.  The following tests are provided to check horizontal situation indicator operation. For a quick check of indicator after installation perform Indicator Power-On Test (Par c). For a more complete check out of the indicator perform Indicator Radio Navigation Displays Test (Par D).
B.  Prepare to Test
(1)  
Provide external electrical power

(2)  
Verify all circuit breakers for flight director, VOR/ILS navigation, compass, and attitude reference systems are closed and all systems are operational.

(3)  
Verify all INST XFMR and INST XFR circuit breakers are closed.

(4)  
Tune both VHF NAV receivers to a VOR frequency other than local VOR station.

(5)  
Position VHF NAV, COMPASS and VERTICAL GYRO transfer switches to NORMAL.

NOTE:  The NORMAL position of transfer switches implies captain on 1 ond first officer on 2.
C.  Indicator Power On Test
(1)  
Open applicable INST XFMR circuit breaker (Ref step. 2.A). Check compass (heading) warning flag appears and NAV-VOR/ILS annunciator displays NAV.

(2)  
Close circuit breakers. Check compass (heading) warning flag retracts and NAV-VOR/ILS annunciator displays VOR/ILS.

(3)  
If no further tests are required, remove electrical power.

5A5 
Feb 20/84  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  34-26-21 Page 401 

 

D.  Indicator Radio Navigation Displays Test.
(1)  
Perform prepare to test procedure (Par B). Check HSI for following:

(a)  
Compass card displays same heading as appropriate RMI or RDDMI.

(b)  
Compass heading flag is out of view.

(c)  
NAV-VOR/ILS annunciator displays VOR/ILS.

(d)  
Data source annunciator display agrees with VHF NAV transfer switch position.

(e)  
GS flag and pointer are out of view.

(f)  
NAV flag in view.

 

(2)  
Using appropriate compass controller perform following:

(a)  
DG/SLAVED switch - SLAVED.

(b)  
SET knob - Turn left. Check HSI compass card rotates smoothly counter-clockwise.

(c)  
SET knob - Turn right to return compass card to airplane heading. Check for smooth clockwise rotation.

 

(3)  
On flight director control panel, perform following:

(a)  
HEADING knob - Rotate until airplane heading is displayed in HEADING window. Check HSI heading marker is under lubber line.
　
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