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Close VOR 1 DC and VOR 2 DC circuit breakers on P7 and select a frequency of
108.00 MHz on captain's VHF NAV control panel. Hold test switch on captain's VHF NAV control panel depressed while verifying following on captain's instruments: HSI course deviation bar is centered; HSI to/from pointer indicates to; HSI NAV flag remains out of view throughout test; and RMI narrow pointers indicate zero |3 degrees with respect to indicator lubber line. IF -
AF AIRPLANES WITH BENDIX RNA-26C RECEIVERS; RMI narrow pointers indicate 180 |3 degrees with respect to indicator lubber line. IF -

OK

EFFECTIVITY
CONFIG 1 AF 101-120,123-154,172,173,
799 Page 103
191-194; GN ALL; LH ALL; MD ALL Sep 25/94
34-31-00
NOT OK

OK Release test button and select a frequency of 108.10 MHz on captain's VHF NAV con-trol panel and verify following on captain's instruments: ADI RWY and glide slope flags and rising runway symbol in view; and HSI GS and NAV flags in view. IF -

 

 

LH AIRPLANES WITH BENDIX RNA-26C (P/N 2067593-2662);
Receivers installed, RMI pointers do not stow at 3 o'clock.

NOT OK
NOT OK
BOTH RMI NARROW POINTERS DO NOT STOW - Replace VOR/ILS
NOT OK
receiver 1 (AMM 34-31-02) and perform specified test.
OK
EFFECTIVITY
 CONFIG 1 AF 101-120,123-154,172,173,
799 Page 104191-194; GN ALL; LH ALL; MD ALL Sep 25/94
34-31-00

LH 061-070,084-099; AF ALL; GN ALL; and MD ALL; Actuate ILS up/left self-test on captain's VHF NAV control panel while verifying following on captain's instruments: ADI and HSI localizer deviation display of 1 dot left; ADI and HSI glide slope deviation display of 1 dot up and ADI RWY and glide slope flags and HSI NAV and GS flags out of view. IF -

EFFECTIVITY
CONFIG 1AF 101-120,123-154,171,172,
799 Page 105191-194; GN ALL; LH ALL; MD ALL Sep 25/94
34-31-00
OK

Release TEST button and tune to local VOR station and listen for identification code on flight interphone system. IF -

antenna circuits per PROCEDURE 3. If glide slope rf reception is questioned, perform glide slope antenna system troubleshooting per AMM 34-31-12.
EFFECTIVITY
CONFIG 1AF 101-120,123-154,172,173,
799 Page 106 191-194; GN ALL; LH ALL; MD ALL Sep 25/94
34-31-00
PROCEDURE 1

NOT OK - Replace autopilot accessory box No. 2 (AMM 22-11-03), AP/FD MSP (AMM 22-11-06) and/or VHF NAV control panel (AMM 34-31-01) and perform specified test. 

coaxial cables as required and/or perform specified test. all three systems, check VOR antenna NOT OK - Audio reception is weak for and associated coaxial cables (AMM 34-00-00/201). Repair or replace replace VOR antenna (AMM 34-32-03) and 

OK - VOR antenna system is operable.

NOTE:Refer to Wiring Diagram Manual for wiring details.
EFFECTIVITY
CONFIG 1AF 101-120,123-154,172,173,
799 Page 107 191-194; GN ALL; LH ALL; MD ALL Sep 25/94
34-31-00
PROCEDURE 2

____Refer to Wiring Diagram Manual for wiring details.
NOTE:
EFFECTIVITY
 CONFIG 1 AF 101-120,123-154,172,173,
799 Page 108191-194; GN ALL; LH ALL; MD ALL Sep 25/94
34-31-00
PROCEDURE 3

____Refer to Wiring Diagram Manual for wiring details.
NOTE:
EFFECTIVITY
 CONFIG 1 AF 101-120,123-154,172,173,
799 Page 109191-194; GN ALL; LH ALL; MD ALL Sep 25/94
34-31-00
 VOR/ILS NAVIGATION SYSTEM - TROUBLE SHOOTING
____________________________________________
 1.  General_______
 A.  The following trouble shooting procedures are based on performance of the system operational test using VOR/ILS navigation system 1. Trouble shooting system 2 can be accomplished using the same procedures with the substitution of first officer for captain and RMI wide bearing pointer for RMI narrow bearing pointer. Trouble shooting alternate VOR/ILS receiver No. 3 can be accomplished by selecting the third receiver in place of receiver No. 1 or 2 and following the applicable procedures. The procedures are presented in tree-type format. The test steps (heavy-line boxes) are connected by shaded arrows to show the OK condition path. When all steps in the OK condition path check out, the system is operable.
 B.  When a test step does not check out, follow the NOT OK line to the box containing the trouble symptom. Turn to the procedure indicated and continue to follow a single line by analyzing the results of each test step until the required corrective action is determined. Perform the specified corrective action; then repeat the step at which the failure was encountered.
 C.  All trouble shooting procedures are based on the assumption that wiring is OK and that electrical power is available. If the corrective action in the procedure does not correct the problem, check wiring using the wiring diagram.
　
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本文鏈接地址：747飛機(jī)維護(hù)手冊AMM CHAPTER 34 - NAVIGATION 第34章導(dǎo)航2(22)