T34308
EFFECTIVITY LH 011-099; AF 121,122,152-199; AZ 221-299; SN 351-399; IB 406-499; AT ALL; GN ALL; MD ALL AND
799 Page 109 VM ALL
34-31-12
Sep 25/94
OK
Check glide slope capture antenna rf distribution runs.
NOTE:____ LH 011-099; AF 121,122,152-156,158-160,162-182,185-199, AND AF 157,161,
183,184 WITHOUT SB 34-2264; AZ 221-299; SN 351-399; IB 406-499; AT ALL;
GN ALL; MD ALL AND VM ALL;
RF from the capture antenna is connected to the VOR/ILS receivers through
contacts of the coaxial relays when the relays are energized. The relays
can be energized on the ground by depressing the GS ANT test switches. If
GS 1 or GS 2 ANT annunciator (P2) does not come on, replace applicable
relay.
NOTE:____ AF 157,161,183,184 WITH SB 34-2264;
RF from the capture antenna is connected to the VOR/ILS receivers through
contacts of the coaxial relays when the relays are energized. The relays
can be energized on the ground by opening glide slope system circuit
breakers on P7 and the primary and alternate landing gear display and
control circuit breakers on P12; disconnecting connectors DM93 and DM809
at landing gear logic units M93 and M809 at station 400 bulkhead;
grounding pin 35 of connector DM93 and pin 36 of DM809; and then closing
glide slope system circuit breakers on P7.
LH 011-050,055-099; AZ 221-299; SN 351-399; IB 406-499;
A third test switch and annunciator labeled G/S 3 ANT and a third coaxial relay
are installed for VOR/ILS receiver No. 3 (Fig. 103).
Adjust signal generator power output and compare at what signal level the glide
slope flags in captain's and first officer's HSIs retract from view. The lower
microvolts setting should be greater than 70% of the higher microvolts setting
that retracts the flags. IF -
____The system with the higher microvolts setting is the system to be checked
NOTE: in the following procedure if the compared sensitivity values are out-of-tolerance.
COMPARED SENSITIVITY VALUES REMAIN OUT-OF-TOLERANCE -
NOT OK
PERFORM PROCEDURE 2.
GS FLAGS DO NOT DISAPPEAR IN EITHER THE CAPTAIN'S
NOT OK
OR THE FIRST OFFICER'S HSI - Replace coaxial relay B404 if faulty display is in captain's HSI or coaxial relay B405 if faulty display is in first officer's
OK HSI. Repeat test.
System is operable.
AF 157,161,183,184 WITH SB 34-2264;
Open glide slope system circuit breakers on P7; remove ground logic units M93 and
M809. Close glide slope circuit breakers on P7 and the primary and alternate
landing gear display and control circuit breakers on P12.
T34321
EFFECTIVITYLH 011-099; AF 121,122,152-199; AZ 221-299; SN 351-399; IB 406-499; AT ALL; GN ALL; MD ALL AND
799 Page 110 VM ALL
34-31-12
Sep 25/94
PROCEDURE 1
T34337
....... ..XA
OPTIONAL: Check antenna tuning per AMM 34-31-00, page 514. IF NOT OK: Replace track antenna without removing door assembly perOHM 32-22-66 and tune new antenna per AMM 34-31-00, page 514.
EFFECTIVITYLH 011-099; AF 152-156,158-160, 162-182,185-199; AZ 221-299; SN 351-399; IB 406-499; AT ALL;
799 Page 111 GN ALL; MD ALL AND VM ALL Sep 25/94
34-31-12
PROCEDURE 1
E47837
EFFECTIVITY
AF 121,122, AND AF 157,161,183,
799 Page 112 184 WITH SB 34-2264 Sep 25/94
34-31-12
PROCEDURE 2
*[1] LH 011-099; AF 121,122,152-156, 158-160,162-182,185-199, AND AF 157,161,183,184 WITH SB 34-2264; AZ 221-299; SN 351-399; IB 406-499; AT ALL; GN ALL; MD ALL AND VM ALL
T34351
EFFECTIVITY
LIMITED - SEE *[1] ABOVE FOR
799 Page 113EFFECTIVITY
34-31-12
Sep 25/94
RECEPTACLE KINGS KA-19-51,PLUG
BENDIX 8005-1, KINGS KA-59-29 OR EQUIVALENT
RG-141/U OR EQUIV (1 FOOT)
TEST CABLE REQUIRED TO CHECK TRACK ANTENNA CABLE BETWEEN HYBRID JUNCTIONS AND RECEIVER CABLES AND BEYWEEN HYBRIDS
中國航空網 m.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：747飛機維護手冊AMM CHAPTER 34 - NAVIGATION 第34章導航2(48)
