(2)
Loosen clamp and pull out indicator.
(3)
Disconnect electrical connectors.
B. Install Indicator
(1)
Connect electrical connectors, push in indicator, and tighten clamp.
(2)
Close circuit breakers opened in step A. (1).
C. Test Indicator
(1)
The following tests are provided to check attitude director indicator operation. For a quick check of indicator after installation perform Indicator Self-Test in par.
(2)
. For a more complete check of the indicator perform Indicator Command, V-Bar and Warning Flag Test in par. (3).
(2)
Indicator Self-Test
(a)
On appropriate ADI, press and hold TEST switch. Check ATT flag appears and horizon sphere rotates left 15 to 25 degrees and down 5 to 15 degrees.
(b)
Release TEST switch. Check horizon sphere returns to display airplane attitude and ATT flag retracts from view.
(c)
If no further tests are required, remove electrical power.
(3)
Indicator Command V-Bar and Warning Flag Test
(a)
Prepare to test. 1) Provide external electrical power. 2) Check all circuit breakers for flight director, VOR/ILS navigation, compass, and
attitude reference systems are closed and all systems are operational. 3) Tune VHF NAV receivers to a localizer frequency other than local VOR/TAC station. 4) Open circuit breakers for appropriate LRRA system.
(b)
Test
5C8
Oct 20/86 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 34-26-11 Page 401
1) Position flight director mode selector to OFF.
Check ADI for following:
ATT flag - Out of view
CMPTR flag - Out of view
V-Bars - Out of view
SPEED flag - In view
GS flag - In view
RUNWAY flag - In view
Runway symbol - In view behind Runway flag
Attitude Sphere - Displays airplane attitude.
2) Open appropriate VG circuit breaker. Check ATT flag comes into view. 3) Close VG circuit breaker. Check ATT flag goes out of view. 4) Open appropriate FLT DIR AC and DC circuit breakers. Check CMPTR flag
comes into view. 5) Close FLT DIR AC and DC circuit breakers. Check CMPTR flag goes out of view.
6) On flight director control panel, position mode selector to MAN GS and then to AUTO APP. Check CMPTR, RUNWAY and GS flags are in view, V-Bars are out of view, and check F/D Approach Progress Display for green VOR/LOC annunciation.
7) On appropriate VHF NAV control panel, actuate UP/LT self-test while checking for following: a) After 3 seconds CMPTR, RUNWAY, and GS flags go out of view, V-Bars
come into view and display up left steering command, glide slope pointer deflects up, and runway symbol moves left. b) After 20 seconds CMPTR, RUNWAY, and GS flags come into view, V-Bars
go out of view, and runway symbol returns to center. 8) Release Up/LT test switch. 9) Close appropriate LRRA system circuit breakers. Check ADI runway symbol
moves up to bottom of airplane symbol. 10) Tune appropriate VHF NAV receiver to a VOR frequency. Check ADI RUNWAY
flag, symbol, GS flag and glide slope pointer go out of view.
11) Position flight director mode selector to OFF.
12) Remove external electrical power if no longer required.
5C8
34-26-11 Page 402 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Jun 20/85
3. ADI Removal/Installation (Airplanes with Sperry SP177 Auto Flight Control System)
A. Remove Indicator
(1)
Open following listed circuit breakers on P18 or P6 circuit breaker panel (system 1 for CAPT ADI, system 2 for F/0 ADI): ADI ADI ALT Autothrottle (A/T) FLT DIR VHF NAV (VOR/LOC, G/S) VERT GYRO
(2)
Loosen clamp and pull out indicator.
(3)
Disconnect electrical connectors.
B. Install Indicator
(1)
Connect electrical connectors, push in indicator, and tighten clamp.
(2)
Close circuit breakers opened in step A.(1).
C. Test Indicator
(1)
The following tests are provided to check attitude director indicator operation. For a quick check of indicator after installation perform Indicator Self-Test in paragraph (2). For a more complete check of the indicator perform the Indicator Self-Test in paragraph (2) and the Indicator Command Bar and Warning Flag Test in paragraph (3).
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