H24863
VOR Antenna Installation 500
34-31-11Page 402 Figure 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Feb 15/69
GLIDE SLOPE ANTENNA - REMOVAL/INSTALLATION
1. Equipment and Materials
A. Bonding Meter (Ref 20-22-01)
2. Remove Glide Slope Antenna
A. Open radome.
(1)
Remove screws from edge of radome.
(2)
Insert fingers at bottom aft end of radome and rotate bottom edge forward and up.
CAUTION: DO NOT PRY RADOME OPEN.
(3)
Install support when radome is open.
NOTE: 1) Before removing glide slope antenna, inspect the glide slope antenna director bar. It is a 13-inch continuous strip of aluminum foil tape, positioned horizontally across the centerline on the inside surface of the nose radome, approximately 22 inches from the radome upper aft edge.
2) If director bar is undamaged and still in the 13-inch continuous configuration, proceed with glide slope antenna removal. Replace the tape if is has been cut, damaged or losing adhesion per instruction in 53-52-0.
B. Remove screws holding glide slope antenna to support plate (Fig. 401).
C. Pull antenna assembly forward far enough to gain access to antenna connectors.
D. Disconnect antenna connectors and remove antenna assembly.
3. Install Glide Slope Antenna
A. Clean faying surfaces of antenna and airplane structure to provide an electrical bond with a maximum resistance of 0.01 ohm.
B. Hold antenna adjacent to mounting plate and connect antenna cables.
C. Set antenna in place on mounting plate and install mounting screws (Fig. 401).
D. Check antenna cables are not kinked.
E. Check electrical bond between antenna and airplane structure per 20-22-01. Resistance should not exceed 0.01 ohm.
F. Close radome and reinsert mounting screws.
G. Test glide slope antenna for satisfactory operation (Ref 34-31-0 A/T).
501
Oct 20/87 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 34-31-21 Page 401
Glide Slope Antenna Installation 500
34-31-21 Figure 401 Oct 20/90
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
NAVIGATION UNIT - REMOVAL/INSTALLATION
1. General
A. The navigation units are installed in electronics equipment rack E3-4. Each unit is held in place by two retaining knobs.
2. Remove Navigation Unit
A. Open circuit breakers on electronic load control center circuit breaker panels P6 and P18 as follows:
Navigation Unit Circuit Breaker/Panel
P6 Panel P18 Panel
NO. 1 VOR/LOC-1
GS-1
INSTR XFMR NO. 1
NO. 2 VOR/LOC-2
GS-2
INSTR XFMR NO. 2
B. Loosen and disengage retaining knobs securing navigation units to rack and withdraw unit from rack.
3. Install Navigation Unit
A. Position navigation unit in rack and secure retaining knobs.
B. Close circuit breakers opened in par. 2.A. above.
C. Test navigation unit for satisfactory operation as follows:
(1)
Provide electrical power and energize P6 and P18 load control centers.
(2)
Position flight director mode selector to HDG.
(3)
Energize flight interphone system and VOR/ILS navigation system.
(4)
Tune VOR/ILS navigation system to local VOR station and listen for identification code on flight interphone.
(5)
Turn off flight interphone and VOR/ILS navigation systems.
(6)
Remove electrical power if no longer required.
501
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