(2)
Set compass controller switches for MHRS No. 1 and No. 2 to SLAVED.
(3)
Allow systems to stabilize for approximately 5 minutes.
(4)
Observe that heading flags are out of view and all compass cards indicate present airplane magnetic heading in all horizontal situation and radio magnetic indicators.
(5)
On both compass controllers, observe that synchronization annunciator is centered.
(6)
Compare all compass card readings. System containing magnetic compensator under test should produce same readings as other MHR system within tolerances of the following table.
EFFECTIVITY
ALL 35 Page 501 Oct 25/8034-21-02
MHRS No. 1__________ MHRS No. 2__________
(all readings (all readings
must agree must agree
within 2.) within 2.)
CAPT HSI Readings between F/O HSI
CAPT VOR RMI systems must F/O VOR RMI
F/O ADF RMI agree within 3. CAPT ADF RMI
(7)
If no longer required, turn off inertial navigation systems (Ref 34-41-00).
(8)
If no longer required, turn off equipment cooling (Ref 21-58-00).
(9)
If no longer required, remove electrical power (Ref 24-22-00).
EFFECTIVITY
ALL 02 Page 502 Jul 25/7834-21-02
COMPASS COUPLER - REMOVAL/INSTALLATION
______________________________________
1. General
_______
A. The compass couplers are installed in the main equipment center on shelf E1-1 and held in place by a cam-action lever built into the units handle. The compass couplers are electrically connected by a connector in the rear of the unit.
2. Referenced Procedures
_____________________
A. 24-22-00, Maintenance Practices (Apply Power)
3. Remove Compass Coupler
______________________
A. Open MHRS 1 and MHRS 2 circuit breakers on electronic circuit breaker panel (P7).
B. Release locking lever in unit handle and remove compass coupler.
4. Install Compass Coupler
_______________________
A. Open MHRS 1 and MHRS 2 circuit breakers on electronic circuit breaker panel (P7).
B. Slide compass coupler onto shelf. Engage cam-lock handles in shelf fork assemblies (Ref 20-11-13, Cam-Lock Lever Latch Fork Adjustment, Type II.)
CAUTION: IMPROPER ADJUSTMENT OF CAM-LOCK LEVER LATCH FORK ASSEMBLIES ON
_______ EQUIPMENT SHELF MAY CAUSE CIRCUIT MALFUNCTION OR EQUIPMENT DAMAGE.
C. Test compass coupler.
(1)
Provide electrical power (Ref 24-22-00).
(2)
Close MHRS 1 and MHRS 2 circuit breakers (panel P7).
(3)
Vary heading control on AP-FD mode select panel. Check that heading bug, on HSI for system being tested, is tracking.
(4)
Remove electrical power if no longer required (Ref 24-22-00).
EFFECTIVITY
ALL 02 Page 401 Oct 10/7334-21-03
COMPASS CONTROLLER - REMOVAL/INSTALLATION
_________________________________________
1. General
_______
A. The two compass controllers are installed on the pilots' overhead panel (P5) with quick-connect fasteners.
2. Reference Procedures
____________________
A. 24-22-00, Maintenance Practices (Apply Power)
3. Remove Compass Controller
_________________________
A. Place panel light control to OFF.
B. Open MHRS 1 and MHRS 2 circuit breakers on electronic circuit breaker panel P7.
C. Disconnect electrical connector, remove mounting fasteners, and remove controller.
4. Install Compass Controller
__________________________
A. Connect electrical connector and install controller in panel
using mounting fastners.
B. Test Compass Controller
(1)
Provide electrical power (Ref 24-22-00).
(2)
Close circuit breakers listed in step 3.B., adjust panel lighting control to maximum brightness position. Verify lighting on panel.
(3)
Remove electrical power if no longer required (Ref 24-22-00).
EFFECTIVITY
ALL 03 Page 401 Oct 10/7334-21-04
FLIGHT INSTRUMENT SWITCHING RELAY - REMOVAL/INSTALLATION
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本文链接地址：747飞机维护手册AMM CHAPTER 34 - NAVIGATION 第34章导航1(137)
