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THE INDICATIONS OCCUR - Hold the UP/LT test switch on the No. 1 VHF NAV control panel in the UP/LT position. Make sure this sequence occurs: These indications occur for approximately three seconds:
1. The glide slope pointers on the captain's EADI and EHSI are out of view
2. The localizer pointers on the captain's EADI and EHSI are out of view. These indications occur after approximately three seconds:
1. The glide slope pointers on the captain's EADI and EHSI move one dot in the up direction
2. The localizer pointers on the captain's EADI and EHSI move one dot in the left direction.
These indications occur after approximately 23 seconds: 1. The glide slope pointers on the captain's EADI and EHSI go out of view
2. The localizer pointers on the captain's EADI and EHSI go out of view. Release the UP/LT test switch. IF -
THE UP/LT TEST DOES NOT OPERATE - Make IF -tion. Do the UP/LT self-test again. transfer switch to the BOTH ON 2 posi-No. 2 navigation unit. Set the VHF NAV sure the UP/LT test operates for the
If the problem continues, do a trouble-THE UP/LT TEST DOES NOT OPERATE -Replace the indicator with the defective display. Do the UP/LT self-test again. shooting on the circuits for the trans-fer switches. (Refer to the Wiring Diagram Manual and the Radio Navigation Schematics.)
THE UP/LT TEST OPERATES -Replace the No. 1 navigation unit. Do the UP/LT self-test again.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. A 737-300/400/500MAINTENANCE MANUAL
C THE UP/LT TEST OPERATES - Set the VHF NAV transfer switch to the NORMAL position. Hold the DN/RT test switch on the No. 1 VHF NAV control panel in the DN/RT posi-tion. Make sure this sequence occurs: These indications occur for approximately three seconds: 1. The glide slope pointers on the captain's EADI and EHSI are out of view
2. The localizer pointers on the captain's EADI and EHSI are out of view. These indications occur after approximately three seconds:
1. The glide slope pointers on the captain's EADI and EHSI move one dot in the down direction
2. The localizer pointers on the captain's EADI and EHSI move one dot in the right direction.
These indications occur after approximately 23 seconds: 1. The glide slope pointers on the captain's EADI and EHSI go out of view
2. The localizer pointers on the captain's EADI and EHSI go out of view. Release the UP/LT test switch. IF -
tion. Do the DN/RT self-test again. transfer switch to the BOTH ON 2 posi-No. 2 navigation unit. Set the VHF NAV sure the DN/RT test operates for the THE DN/RT TEST DOES NOT OPERATE - Make
If the problem continues, do a trouble-THE DN/RT TEST DOES NOT OPERATE -Replace the indicator with the defective display. Do the DN/RT self-test again. shooting on the circuits for the trans-fer switches. (Refer to the Wiring Diagram Manual and the Radio Navigation Schematics.)
THE DN/RT TEST OPERATES -Replace the No. 1 navigation unit. Do the DN/RT self-test again.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH EFIS ú
ú ú 01 Page 106 ú Mar 15/92 BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. A 737-300/400/500MAINTENANCE MANUAL
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34-31-02 ú ú 01 Page 107 ú Jul 15/92
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. A 737-300/400/500MAINTENANCE MANUAL PROCEDURE 1
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH EFIS ú www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：737-300 400 500 AMM 飞机维护手册 导航 NAVIGATION 3
