E. Installation of the Radio Altimeter Antenna
R **ON A/C 061-099, 102-149, 151-199, 201-299, 301-399, 401-499,
(Ref. Fig. 401A/TASK 34-42-11-991-001-A)
**ON A/C ALL
WARNING : MAKE SURE THAT THERE IS A GOOD FLOW OF AIR THROUGH THE WORK
_______ AREA WHEN YOU USE SPECIAL MATERIALS. IF YOU GET ONE OF THESE MATERIALS ON YOUR SKIN, IN YOUR MOUTH OR IN YOUR EYES : -FLUSH IT AWAY WITH A FLOW OF CLEAN WATER FOR BETWEEN 10 AND 15 MINUTES. -GET IMMEDIATE MEDICAL AID IF IRRITATION OCCURS. DO NOT BREATHE THE FUMES FROM THE MATERIAL. DO NOT SMOKE WHEN YOU USE THE MATERIAL. DO NOT USE THE MATERIAL NEAR A FLAME, SPARKS OR SOURCES OF HEAT. THESE MATERIALS ARE DANGEROUS : THEY ARE POISONOUS, FLAMMABLE AND SKIN IRRITANTS.
(1)
Make sure that the O-ring (6) is in good condition. If the O-ring (6) is not in good condition, use a new one.
(2)
Install the O-ring (6).
(3)
Check the teflon gasket (8). If you find any damages, use a new teflon gasket.
(4)
Install the teflon-gasket (8) on the antenna (4).
(5)
Shrink the sleeve (10) ABS0916 over the coaxial cable and make sure that the sleeve (10) does not cover the locknut (13).
(6)
Shrink the sleeve (12) ABS0916B07 below the thread (14) of the antenna connector (3).
(7)
Push the shrink sleeve (11) ABS0916B08 over the coaxial cable.
(8)
Remove the blanking caps from the electrical connectors.
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R (9) Make sure that the electrical connectors are clean and in the correct condition.
R (10) Connect the coaxial connector (2) to the antenna connector (3).
R (11) TORQUE the coaxial connector (2) to 0.265 m.daN (23.45 lbf.in).
R (12) Shrink the sleeve (12) ABS0916B08 over both connectors (2) and (3).
R (13) Apply sealant:
WARNING : OBEY THE MANUFACTURER'S INSTRUCTIONS WHEN YOU USE_______ THIS/THESE MATERIAL/S. USE PROTECTIVE CLOTHING, RUBBER GLOVES, GOGGLES AND A MASK.
(a) Apply some sealant SEALANTS (Material No. 09-001B) or SEALANTS (Material No. 09-001D)over the ends of the shrinksleeve (11) and also on the antenna body (inner part up to the O-ring).
R (14) Put the antenna (4) in position. Make sure that the FWD sign or the datum mark on the antenna points are in the direction of flight. Install the screws (5).
NOTE : The antenna mounting screws (5) give the electrical bonding____ between the antenna (4) and the fuselage structure (1) . (Ref. TASK 20-28-00-912-005)
R (15) TORQUE the screws (5) to between 0.3 and 0.35 m.daN (26.54 and 30.97 lbf.in) in a diagonally opposite sequence.
R (16) Remove sealant:
WARNING : OBEY THE MANUFACTURER'S INSTRUCTIONS WHEN YOU USE_______ THIS/THESE MATERIAL/S. USE PROTECTIVE CLOTHING, RUBBER GLOVES, GOGGLES AND A MASK.
(a) Remove the unwanted sealant with a SCRAPER - NON METALLIC.
R (17) Make sure that the bonding contact resistance between the antenna (4) and the fuselage structure (1) is not higher than 5 milliohms (Ref. TASK 20-28-00-912-005).
R (18) Make a sealing:
WARNING : OBEY THE MANUFACTURER'S INSTRUCTIONS WHEN YOU USE_______ THIS/THESE MATERIAL/S. USE PROTECTIVE CLOTHING, RUBBER GLOVES, GOGGLES AND A MASK.
(a) Make a sealing bead with SEALANTS (Material No. 09-016) around the antenna (4).
R (19) Apply SEALANTS (Material No. 09-016) to the heads of the screws (5).
R (20) Make the contour of the sealant:
WARNING : OBEY THE MANUFACTURER'S INSTRUCTIONS WHEN YOU USE_______ THIS/THESE MATERIAL/S. USE PROTECTIVE CLOTHING, RUBBER GLOVES, GOGGLES AND A MASK.
(a) Make the contour of the sealant on the screws (5) and around the antenna (4) smooth.
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