EFFECTIVITY AIRPLANES WITH LTN-72 INS
CONFIG 01 A Page 116 Aug 25/87
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NOT OK
OK
NOT OK
OK
NOT OK
OK Re-enter track of 1-2. Set display selector to DSR TK/STS and observe mode sequencing until MSU READY NAV lamp illuminates - Check that right display decrements to status 02 and that not over 10 minutes have elapsed since start of status 40. IF -
Set Mode selector to NAV position and verify the following:
(1) READY NAV annunciator goes out
(2) Right data display shows status 01.
(3) With display selector switch set to POS, latitude and longitude displays
correspond to inserted values |0.5 arc minute
(4) With display selector set to TK/GS, right display does not exceed 4 knots.
IF -
MALFUNCTION ENCOUNTERED WHEN SYSTEM OPERATING IN NAV MODE -PROCEDURE 21
Open INS 115-volt ac circuit breakers - Check that BATT annunciator on CDU illuminates and ground crew call horn blows in approximately 30 seconds. IF -
CDU BATTERY IN USE LAMP AND MECHANIC CALL HORN INOPERATIVE -PROCEDURE 22
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EFFECTIVITY
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PROCEDURE 1
EFFECTIVITY AIRPLANES WITH LTN-72 INS
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PROCEDURE 2
EFFECTIVITY
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PROCEDURE 3
PROCEDURE 4
MSU BATT ANNUNCIATOR ON WITH MODE SELECTOR SET TO OFF POSITION.
MSU (Ref 34-41-01) BATT annunciator will not reset when pressed, replace in sequence: Battery unit (Ref 34-41-04) INU (Ref 34-41-03) (3) (2) (1)
EFFECTIVITY
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PROCEDURE 5
PROCEDURE 6
EFFECTIVITY AIRPLANES WITH LTN-72 INS
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PROCEDURE 7
PROCEDURE 8
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PROCEDURE 9
TK CHG and/or INSERT keys still not OK, replace in sequence:
(1)
CDU (Ref 34-41-02)
(2)
INU (Ref 34-41-03)
PROCEDURE 10
EFFECTIVITY AIRPLANES WITH LTN-72 INS
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PROCEDURE 11
MALFUNCTION ENCOUNTERED WHILE LOADING PRESENT POSITION COORDINATES. IF -
selector switch to STBY. selector switch set to POS and mode right display to blank, ensure data cause the corresponding left or Pressing N, S, E, W key does not
(2) INU (Ref 34-41-03) (1) CDU (Ref 34-41-02) STILL NOT OK - Replace in sequence:
Pressing INSERT key does not cause data to be inserted in INS, replace in sequence:
(1)
INU (Ref 34-41-03)
(2)
CDU (Ref 34-41-02)
|0.2 arc minute of inserted data repeat loading procedure. IF -after INSERT button is pressed, Numerical displays are not within
(2) CDU (1) INU STILL NOT OK - Replace in sequence:
EFFECTIVITY
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PROCEDURE 12
Incorrect, go to OFF and start over. IF -Still not OK, replace INU.
EFFECTIVITY
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PROCEDURE 13
MALFUNCTION WHEN DISPLAY SELECTOR SET AT TK/GS
Ensure correct operating procedures used, replace in sequence: (2) INU (Ref 34-41-03) (1) CDU (Ref 34-41-02)
PROCEDURE 14
MALFUNCTION WHEN DISPLAY SELECTOR SET AT HDG/DA
Ensure correct operating procedures used, replace in sequence: (2) INU (Ref 34-41-03) (1) CDU (Ref 34-41-02)
EFFECTIVITY
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PROCEDURE 15
MALFUNCTION ENCOUNTERED WHILE LOADING AND DISPLAYING WAYPOINT POSITIONS
When WPT 1 is selected (at turn on) left and right displays do not be-come all zeroes, replace in sequence:
(1)
INU (Ref 34-41-03)
(2)
CDU (Ref 34-41-02)
Pressing INSERT key does not cause data to be inserted in INS when present position coordinates have been inserted and a waypoint selec-tion other than zero has been made, replace in sequence: 中國航空網 www.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3(13)
