(2)
Spatula - fillet smoothing tool, hardwood or plasticConsumable Materials
(1)
A00247 Sealant - BMS 5-95, Class B-1/2
(2)
B00316 Solvent - Aliphatic Naphtha TT-N-95
(3)
C00032 Enamel - Ext Decor Protect, Gloss - BMS 10-60
(4)
G00009 Corrosion Preventive Compound (Dow Corning No. 4) - BMS 3-23
(5)
G00033 Woven Cheesecloth - BMS 15-5References
(1)
20-11-14/701, Metal Surfaces
(2)
20-22-01/601, Electrical Bonding
(3)
24-22-00/201, Manual Control
(4)
32-00-30/201, Landing Gear Door Locks
(5)
34-31-00/501, Instrument Landing System
(6)
51-21-03/701, Corrosion (Removal and Control)
(7)
51-24-13/701, Water Displacing Corrosion Preventive Compound
(8)
51-31-01/201, Seals and Sealing
(9)
IPC 34-31-03 Fig. 1
IPC 34-31-07 Fig. 2Access
(1)
Location Zones 113 Nose Gear Well, LH 114 Nose Gear Well, RH
Procedure
S 864-041
(1) Make sure these circuit breakers are open with DO-NOT-CLOSE tags attached:
(a) P7 Overhead Circuit Breaker Panel
1) 7A6 NAV RADIO MMR L
2) 7B6 NAV RADIO MMR C
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3) 7B17 NAV RADIO MMR R
(2) S 114-042Clean the mating surfaces of the antenna and aft nose gear door (Ref 20-11-14/701):
CAUTION:_______ APPLY THE SOLVENT TO MATING SURFACES ONLY. MAKE SURE YOU RUB OFF THE SOLVENT FROM OTHER SURFACES. IF THE SOLVENT STAYS ON A SURFACE FOR A LONG TIME, IT CAN CAUSE DAMAGE TO THE SURFACE FINISH.
(a) (b) (c) Apply aliphatic naphtha TT-N-95 solvent to the mating surfaces of the antenna and the airplane structure with a clean BMS 15-5 cloth. Use light pressure (Ref 51-21-03/701)Use a clean cloth and clean the surface againDo these two steps until the metal of the mating surfaces is bright, clean, and dry.
(3) S 394-044Apply a layer of BMS 3-23 corrosion-preventive compound to the mating surfaces (Ref 51-24-13/701).
(4) S 424-045Install the glide slope track antenna: (a) Put the glide slope track antenna into its position (b) Install the nuts, bolts, and washers to attach the glide slope track antenna to the aft nose gear door.
(5) S 764-046Measure the resistance between the antenna plate and the aft nose gear door (Ref 20-22-01/601). The resistance must be 0.01 ohm maximum. (a) Connect the coaxial connectors to the glide slope track antenna.
(6) S 864-047Remove the DO-NOT-CLOSE tags and close these circuit breakers: (a) P7 Overhead Circuit Breaker Panel 1) 7A6 NAV RADIO MMR L 2) 7B6 NAV RADIO MMR C 3) 7B17 NAV RADIO MMR R
(7) S 714-048Test the glide slope antenna: (a) Do the Prepare for the System Test and the Glide Slope parts of the ILS System Test (Ref 34-31-00/501).
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747-400 MAINTENANCE MANUAL
S 864-049
(8)
If electrical power is not necessary, do this task to remove electrical power: Manual Control (AMM 24-22-00/201).
S 424-026
(9)
Complete the glide slope track antenna and access door installations:
(a)
Put the access panel into position.
(b)
Install fasteners to attach the access panel to the aft nose gear door.
(c)
Apply the fillet of aerodynamic smoother around the bottom of glide slope track antenna and access panel. Use BMS 5-95, Class B-1/2 sealant (Ref 51-31-01/201)
NOTE:____Make sure there is no air in the sealant. Use more sealant than necessary to make sure the fillet is smooth and level. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：747-400 AMM 飞机维护手册 导航 NAVIGATION 2(48)
