Installation of the Radome

TASK 53-15-11-400-001-A
Installation of the Radome

WARNING: BECAUSE THE RADOME IS LARGE AND HEAVY, A MINIMUM OF TWO PERSONS (OR SUPPORT EQUIPMENT, SUCH AS A CRANE AND SLINGS) ARE NECESSARY TO MOVE IT. IF YOU MOVE IT WITHOUT THE NECESSARY NUMBER OF PERSONS (OR SUPPORT EQUIPMENT), YOU CAN CAUSE INJURY TO PERSONNEL OR DAMAGE TO THE RADOME.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

WARNING: BEFORE YOU START WORK, YOU MUST PUT ON A SAFETY HARNESS AND ATTACH IT TO THE ACCESS PLATFORM. WITHOUT A SAFETY HARNESS, YOU CAN FALL. THIS CAN KILL YOU OR CAUSE YOU INJURY.

WARNING: MAKE SURE THAT:

THERE ARE NO PERSONS OR OBSTACLES IN THE RADOME AREA.
THE CAPT AND F/O DISPLAY SELECTOR SWITCHES ON THE WEATHER RADAR CONTROL UNIT ARE SET TO OFF (THIS PREVENTS SYSTEM EMISSIONS ON THE GROUND).

WARNING: DO NOT OPEN THE RADOME IF THE WIND SPEED IS MORE THAN 25 KNOTS.

CAUTION: BEFORE YOU INSTALL/REMOVE THE GSE-TOOL, READ THE INSTRUCTIONS IN THE APPLICABLE GSE INSTRUCTION MANUAL. WHILE YOU OPERATE THIS TOOL, CAREFULLY OBEY THEM. IF YOU DO NOT OBEY THE INSTRUCTIONS, DAMAGE TO EQUIPMENT CAN OCCUR.

CAUTION: TAP THE SURFACE OF THE COMPONENT LIGHTLY. IF YOU APPLY TOO MUCH FORCE, YOU CAN CAUSE DAMAGE TO THE RADOME.

CAUTION: ONLY USE HAND TOOLS TO REMOVE OR INSTALL OR TORQUE THE RADOME OR SKIRT FASTENERS. IF YOU USE POWER OR IMPACT TOOLS, YOU CAN CAUSE DAMAGE TO THE AIRCRAFT.

CAUTION: WHEN YOU REMOVE OR INSTALL THE RADOME OR THE ANTENNA, MAKE SURE THAT YOU DO NOT CAUSE DAMAGE TO THE SURFACES THAT ARE PAINTED WITH RADIO-ABSORBENT MATERIAL.

CAUTION: WHEN YOU INSTALL THE RADOME, MAKE SURE THAT YOU INSTALL THE CORRECT SCREWS/BOLTS (THEY HAVE DIFFERENT LENGTHS) AND TORQUE THEM IN THE CORRECT SEQUENCE. IF THE SCREWS/BOLTS ARE INCORRECTLY INSTALLED, THE RADOME CAN BECOME LOOSE DURING FLIGHT.

CAUTION: THIS PART IS A REMOVABLE STRUCTURAL COMPONENT (RSC), WHICH CAN BE MOVED BETWEEN AIRCRAFT. THUS IT CAN HAVE DIFFERENT OPERATION CONDITIONS AND A DIFFERENT LIFE RECORD (FLIGHT HOURS/FLIGHT CYCLES/CALENDAR) FROM THE AIRCRAFT IT IS INSTALLED ON OR REMOVED FROM. THE OPERATOR IS RESPONSIBLE FOR THE SPECIFIC TRACKING AND CONTINUED AIRWORTHINESS OF REMOVABLE STRUCTURAL COMPONENTS. INCORRECT MAINTENANCE OF THESE COMPONENTS CAN CAUSE A RISK FOR THE FLIGHT SAFETY.

ZONE: 110
FIN: 1560WM

1. Reason for the Job

NOTE: The weight of this equipment is approximately 28kg (62lb).

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE
No specific	1	CRANE 50KG (110 LB)
No specific	AR	GAGE - SPRING
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 0.37 and 0.28 m.daN (32.74 and 24.78 lbf.in )
98D53103500000	1	SLING-RADOME
98L12003001000	AR	HARNESS,SAFETY

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03JAB1)	Silicone base Grease-- Paste -
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
110	RADOME (NOSE CONE TO FR 1)

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
1	COTTER PINS	AIPC 53-15-11-01-040
2	COTTER PINS	AIPC 53-15-11-01-040
13	COTTER PINS	AIPC 53-15-11-01-080
13	COTTER PINS	AIPC 53-15-11-01-210
1	COTTER PINS	AIPC 53-15-81-01-010
13	COTTER PINS	AIPC 53-15-81-01-210

E. Referenced Information

REFERENCE	DESIGNATION
TASK 20-28-00-869-002-A	Table of the Maximum Permitted Resistance-Values
TASK 20-28-00-912-802-A	Electrical Bonding - General Maintenance Procedure
TASK 20-28-00-912-803-A	Bonding Surface Preparation
TASK 53-15-11-010-001-A	Opening of the Radome
TASK 53-15-11-300-001-A	Repair of the Radome
TASK 53-15-11-410-001-A	Closing of the Radome
Radome Sling
Radome
Radome
Clearance Check between the Bolts and the Support Fittings
Adjustment of the Locking Handle of the Radome
Check of the Out-of-Flush Dimension of the Hook ** ON A/C NOT FOR ALL
Check of the Out-of-Flush Dimension and Adjustment of the Hook ** ON A/C NOT FOR ALL
Clearances between the Radome and the Aircraft Structure
Radome - Seal Compression
Stop Fittings - Application of the Grease

3. Job Set-up
Subtask 53-15-11-865-051-A

WARNING: MAKE SURE THAT THE CIRCUIT BREAKERS RELATED TO THE WEATHER RADAR ARE OPENED, SAFETIED AND TAGGED.

A. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
121VU	COM NAV/RADAR/1	5SQ1	K13
** ON A/C NOT FOR ALL
121VU	COM NAV/RADAR/2	5SQ2	K14

Subtask 53-15-11-869-050-A

B. Aircraft Maintenance Configuration
(1) Make sure that the ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE is in position at zone 110.
(2) Put on and attach the HARNESS, SAFETY before you start work in the work area.
(3) Make sure that the WARNING NOTICE(S) is(are) in position in the cockpit to tell persons not to operate the radar system.

Subtask 53-15-11-420-056-A

C. Installation of the Radome Sling

Radome Sling

(1) Install the 98D53103500000 SLING-RADOME (42) on the radome.
(2) Attach the ends of the sling to the housings of the handles (41) and to the hinge fittings.
(3) Attach the 98D53103500000 SLING-RADOME (42) to the CRANE 50KG (110 LB).
(4) Make sure that there is tension in the 98D53103500000 SLING-RADOME (42).

Subtask 53-15-11-820-051-B

D. Adjustment of the Telescopic Rods
(1) For all the radomes (do not include the S2 GLASS radome):

Radome

(a) Make sure that the telescopic rods (10) have the correct orientation with the fittings at FR1.
(b) If the telescopic rods (10) do not have the correct orientation with the fittings at FR1, adjust the telescopic rods (10).
(2) For the S2 GLASS radome (Part Number (P/N) D53132110000):

Radome

(a) Make sure that the telescopic rods (11) point in the correct direction to the radome (8).
(b) If the telescopic rods (11) do not point in the correct direction to the radome (8), adjust the telescopic rods (11).

4. Procedure
Subtask 53-15-11-420-050-B

A. Installation of the Radome

WARNING: USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.

CAUTION: DO NOT USE THE LOCALIZER ANTENNA AT THE BOTTOM OF THE RADOME AS A SUPPORT.

CAUTION: MOVE THE RADOME CAREFULLY TO PREVENT DAMAGE TO THE RADAR.

(1) For all the radomes (do not include the S2 GLASS radome):

Radome

(a) Carefully put the radome (1) in position on the structure adjacent to FR1 with the CRANE 50KG (110 LB).
(b) Put and hold the hinge fittings (9) of the radome (1) on the support fittings adjacent to FR1.
(c) Install the bolts (7).
(d) Install the bushes (6) and (5).
(e) Install the washers (4) and the nuts (3).
(f) Tighten the nuts (3).
(g) Safety the nuts (3) with the new AIPC 53-15-11-01-040 COTTER PINS (2).
(2) For the S2 GLASS radome (P/N D53132110000):

Radome

(a) Carefully put the radome (8) in position on the structure adjacent to FR1 with the CRANE 50KG (110 LB).
(b) Put and hold the hinge fittings (9) of the radome (8) on the support fittings adjacent to FR1.
(c) Install the bolts (6).
(d) Install the bushes (5) and (4).
(e) Install the washers (3) and the nuts (2).
(f) Tighten the nuts (2).
(g) Safety the nuts (2) with the new AIPC 53-15-11-01-040 COTTER PINS (1) or the new AIPC 53-15-81-01-010 COTTER PINS (1).
(h) Make sure that minimum peripheral clearance J1 between the bolts (6) and the support fittings (17) of the radome is 0.5 mm (0.0197 in.)

Clearance Check between the Bolts and the Support Fittings

Subtask 53-15-11-420-055-B

B. Connection of the Components

WARNING: USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.

(1) For all the radomes (do not include the S2 GLASS radome):

Radome

(a) Put and hold the telescopic rods (10) on the support fittings at FR1.
(b) Install the bolts (11).
(c) Install the washers (12) and the nuts (14).
(d) Tighten the nuts (14).
(e) Safety the nuts (14) with the new AIPC 53-15-11-01-080 COTTER PINS (13).
(f) Prepare the surface of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-803).
(g) Put and hold the bonding leads (17) on the structure adjacent to FR1.
(h) Install the washers (16) and the bolts (8).
(i) Install the nuts (15) and tighten them.
(j) Do the electrical resistance measurement and the final protection of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-802).
(2) For the S2 GLASS radome (P/N D53132110000):

Radome

(a) Put and hold the telescopic rods (11) in position on the radome (8).
(b) Install the bolts (10). If necessary, pull the heads of the telescopic rods (11) to easily install the bolts (10).
(c) Install the nuts (12) and tighten them.
(d) Safety the nuts (12) with the new AIPC 53-15-11-01-210 COTTER PINS (13) or the new AIPC 53-15-81-01-210 COTTER PINS (13).
(e) Prepare the surface of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-803).
(f) Put and hold the bonding leads (16) on the structure adjacent to FR1.
(g) Install the washers (14) and the bolts (7).
(h) Install the nuts (15) and tighten them.
(i) Do the electrical resistance measurement and the final protection of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-802).

Subtask 53-15-11-020-055-A

C. Removal of the Radome Sling

Radome Sling

(1) Remove the 98D53103500000 SLING-RADOME (42) from the radome.

Subtask 53-15-11-820-050-A

D. Adjustment of the Locking Handle

Adjustment of the Locking Handle of the Radome

(1) Close and open the radome two times (Ref. AMM TASK 53-15-11-410-001) (Ref. AMM TASK 53-15-11-010-001).

NOTE: This is to make sure that the radome is in the correct position for the check (no remaining tension).

(2) Close the radome (Ref. AMM TASK 53-15-11-410-001).
(3) Unlock the latch and make sure that it stays unlocked during the check.
(4) Put the GAGE - SPRING with a capacity of 20 daN (44.9618 lbf) perpendicularly and at 10 mm (0.3937 in.) from the end of the locking handle (30).
(5) Make sure that the tension of the lock is between 8 daN (17.9847 lbf) and 12 daN (26.9771 lbf).
(6) If necessary, adjust the tension of the lock as follows:
(a) Open the radome (Ref. AMM TASK 53-15-11-010-001).
(b) Adjust the tension of the lock to between 8 daN (17.9847 lbf) and 12 daN (26.9771 lbf) with the nut (31) of the spring rod (32).

Subtask 53-15-11-820-056-A ** ON A/C NOT FOR ALL

E. Check of the Hook Out-of-Flush Dimension

Check of the Out-of-Flush Dimension of the Hook ** ON A/C NOT FOR ALL

(1) Make sure that out-of-flush dimension J1 between the hinge arm (92) and the radome (91) is 0.5 -1.5 mm or +1.5 mm (0.0197 -0.0591 in. or +0.0591 in.).

Subtask 53-15-11-820-056-B ** ON A/C NOT FOR ALL

E. Check and Adjustment of the Hook Out-of-Flush Dimension

Check of the Out-of-Flush Dimension and Adjustment of the Hook ** ON A/C NOT FOR ALL

(1) Make sure that out-of-flush dimension J1 between the hook handle (93) and the radome (92) is 0.5 -1.5 mm or +1.5 mm (0.0197 -0.0591 in. or +0.0591 in.).
(2) If out-of-flush dimension J1 is not in the tolerances, adjust the position of the locking fitting (94) as follows:
(a) Loosen the four screws (91).
(b) Adjust the position of the locking fitting (94) with the serrated plate (95).

NOTE: The possible movement of the locking fitting (94) is 0 +3 mm or -3 mm (0.0000 +0.1181 in. or -0.1181 in.).

Subtask 53-15-11-220-053-A

F. Check of the Clearances

Clearances between the Radome and the Aircraft Structure

(1) Measure out-of-flush dimension A1 and peripheral clearance J1 at 17 points to make sure that the radome is correctly installed.

NOTE: If it is not easy to measure them at point 4 (and/or point 15), then you can replace point 4 (and/or point 15) with two new equidistant points (A and/or B). One of these points must be in the sub-frame area and the other must be in the FR1 static-port area. The maximum distance between these two new points (A and/or B) and the initial point 4 (and/or point 15) is 10 mm (0.3937 in.). At these new points (A and B), obey the values and tolerances for out-of-flush dimension A1 and peripheral clearance J1 (for the sub-frame area and the FR1 static-port area). The total number of measurement points is then 18 (if you replace point 4 or point 15) or 19 (if you replace point 4 and point 15).

NOTE: After the first flight that follows the radome installation, a radome deformation can occur because of the aerodynamic loads caused during the flight.
When the aircraft is on ground:

It is permitted for the monolithic border of the radome to touch the fuselage skin.
An into-wind step of 6 mm (0.2362 in.) on a length of 250 mm (9.8425 in.) is permitted between the radome and the fuselage skin (on the top left and right sides). No procedure is necessary.

If the measured values are more than these values, continue the procedure as follows:

(2) Open and close the radome two times (Ref. AMM TASK 53-15-11-010-001) (Ref. AMM TASK 53-15-11-410-001).

NOTE: This is to make sure that the radome is in the correct position for the check (no remaining tension).

(3) Measure out-of-flush dimension A1 between the aircraft structure and the radome at:

15 equidistant points: 1 thru 3, 5 thru 14, 16 and 17
2 points at the top left and right corners of the radome: 4 and 15.

(4) Measure out-of-flush dimension A1 perpendicularly to the local tangent of the external shape of the aircraft:
(a) In the sub-frame area (points 1 thru 4 and 15 thru 17), make sure that out-of-flush dimension A1 is between -1.5 mm (-0.0591 in.) and +3.5 mm (0.1378 in.) on the radome periphery.
(b) In the FR1 static-port area (points 5 thru 7 and 12 thru 14), make sure that out-of-flush dimension A1 is between -1.5 mm (-0.0591 in.) and +2.5 mm (0.0984 in.) on the radome periphery.

NOTE: FR1 out-of-flush dimension A1 between -1.5 mm (-0.0591 in.) and +3 mm (0.1181 in.) is permitted on 25% of the radome periphery.

(c) In the FR1 intermediate area (points 8 and 11), make sure that out-of-flush dimension A1 is between -1.5 mm (-0.0591 in.) and +3.5 mm (0.1378 in.) on the radome periphery.
(d) In the FR1 lower area (points 9 and 10), make sure that out-of-flush dimension A1 is between -1.5 mm (-0.0591 in.) and +4.5 mm (0.1772 in.) on the radome periphery.
(e) In the FR1 static-port area (between points 7 and 8 or points 11 and 12), make sure that out-of-flush dimension A1 at the latches is between -1.5 mm (-0.0591 in.) and +2.5 mm (0.0984 in.) on the radome periphery.
(5) Measure peripheral clearance J1 between the radome and the aircraft structure at:

15 equidistant points: 1 thru 3, 5 thru 14, 16 and 17
2 points at the top left and right corners of the radome: 4 and 15.

(6) Measure peripheral clearance J1 parallel to the cutout of the structure panel and the external shape of the radome (and not to FR1).
(7) Make sure that peripheral clearance J1 is between +0.2 mm (0.0079 in.) and +3.5 mm (0.1378 in.).
(8) Examine peripheral clearance J1 on all the radome periphery, not only on the report points. If there are out-of-tolerance points between the point positions that the design office gave you, record them on the measurement report.

Subtask 53-15-11-220-055-A

G. Check of the Seal Compression

Radome - Seal Compression

(1) Close the radome (102) until the seals (104) touch the aircraft structure (101).
(2) Measure clearance D1.
(3) Fully close the radome (102) (Ref. AMM TASK 53-15-11-410-001).
(4) Make sure that the arrestor pick-up fittings are connected correctly to the bonding-clips.
(5) Measure clearance D2.
(6) Make sure that:

The two radome seals (104) are correctly compressed along their full length.
The seal compression D1 - D2 is 3 +2 mm or -2 mm (0.1181 +0.0787 in. or -0.0787 in.).

Subtask 53-15-11-720-050-A

H. Check of the Ohmic Resistance
(1) For all the radomes (do not include the S2 GLASS radome):
(a) Make sure that the radome is closed (Ref. AMM TASK 53-15-11-410-001).
(b) When the resistivity-test set is available:
1 Measure the ohmic resistance between each lightning arrestor strip of the radome and the adjacent primary structure of the aircraft (Ref. AMM TASK 20-28-00-869-002).
2 Make sure that the ohmic resistance is correct.
(c) When only the megohmmeter is available:
1 Remove a small area (approximately 5 mm2 (0.0078 in.2)) of paint from each lightning arrestor strip to get the correct measurement of the ohmic resistance.

NOTE: You can remove a small quantity of paint from the nearest stud of the fuselage, because there is no anti-erosion paint in this area.

2 Measure the ohmic resistance between each lightning arrestor strip of the radome and the adjacent primary structure of the aircraft (Ref. AMM TASK 20-28-00-869-002).
3 Make sure that the ohmic resistance is correct.
4 Do a paint touch-up (Ref. AMM TASK 53-15-11-300-001).
(2) For the S2 GLASS radome (P/N D53132110000):
(a) Make sure that the radome is closed (Ref. AMM TASK 53-15-11-410-001).
(b) When the resistivity-test set is available:
1 Measure the ohmic resistance between the applicable stud head of each lightning arrestor of the radome and the adjacent primary structure (Ref. AMM TASK 20-28-00-869-002).
2 Make sure that the ohmic resistance is correct.
(c) When only the megohmmeter is available:
1 Remove a small area (approximately 5 mm2 (0.0078 in.2)) of paint from one stud head of each lightning arrestor to get the correct measurement of the ohmic resistance.

NOTE: You can remove a small quantity of paint from the nearest stud of the fuselage, because there is no anti-erosion paint in this area.

2 Measure the ohmic resistance between the applicable stud head of each lightning arrestor of the radome and the adjacent primary structure (Ref. AMM TASK 20-28-00-869-002).
3 Make sure that the ohmic resistance is correct.
4 Do a paint touch-up (Ref. AMM TASK 53-15-11-300-001).

Subtask 53-15-11-640-052-A

I. Application of Grease

Stop Fittings - Application of the Grease

(1) Open the radome (Ref. AMM TASK 53-15-11-010-001).
(2) Clean the mating surface of the stop fittings (41) with Non Aqueous Cleaner-General - - (Material No.08BAA9) and the Textile-Lint free Cotton - (Material No.14SBA1) .
(3) Apply Silicone base Grease-- Paste - (Material No.03JAB1) on the surface of the stop fittings (41) that touches the structure.
(4) Close the radome (Ref. AMM TASK 53-15-11-410-001).

5. Close-up
Subtask 53-15-11-160-051-A

A. Cleaning of the Radome
(1) Clean the outer surface of the radome with the Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .

Subtask 53-15-11-942-051-A

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the plastic bag from the radome after you replaced the radome and before the first flight.
(3) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(4) Close the radome (Ref. AMM TASK 53-15-11-410-001).

Subtask 53-15-11-865-052-A

C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
121VU	COM NAV/RADAR/1	5SQ1	K13
** ON A/C NOT FOR ALL
121VU	COM NAV/RADAR/2	5SQ2	K14

Subtask 53-15-11-942-068-A

D. Close Access
(1) Remove the access platform(s).
(2) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.02 06:28:50 UTC