Installation of the Radio PTT Switch

TASK 27-92-41-400-010-A
Installation of the Radio PTT Switch

NOTE: This task is not applicable for the new-generation side-stick unit. For the new-generation side-stick unit, refer to the procedure (Ref. AMM TASK 27-92-41-400-803). To know if the side-stick installed on the aircraft is a new generation side-stick unit, refer to the procedure (Ref. AMM TASK 27-92-41-860-801).

ZONE: 211
ZONE: 212
FIN: 11RN ** ON A/C NOT FOR ALL
FIN: 12RN ** ON A/C NOT FOR ALL

1. Reason for the Job
Self Explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	Torque wrench: range to between 0.0385 and 0.0315 m.daN (3.41 and 2.79 lbf.in )
DMC519	1	ELECTRICIAN SERVICE TOOL KIT

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.05BAA1)	Threadlocking Adhesive-- Low strength -
(Material No.06BHG1)	Silicone Sealant-Firewall High Temp. -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
211	COCKPIT
212	COCKPIT
822

D. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 27-92-41-400-006-A	Installation of the Control Handle
ESPM 2056420
ESPM 2048240	(for corrective action)
Radio PTT Switch
Electrical Wiring of the Captain Side-Stick Handle
Electrical Wiring of the First Officer Side-Stick-Handle

3. Job Set-up
Subtask 27-92-41-860-058-A

A. Aircraft Maintenance Configuration
(1) Make sure that the ground service network is energized (Ref. AMM TASK 24-42-00-861-001).
(2) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position at access door 822.
(3) Make sure that access door 822 is open.
(4) On the battery power center 105VU:

Make sure that the protective cover is removed.

4. Procedure
Subtask 27-92-41-420-059-A

A. Installation of the Radio PTT Switch (11RN,12RN)
(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) If you install a new PTT switch, you must install a pin contact at the end of each wire ESPM 2048240.

NOTE: The Part Number (PN) of the pin contact is available in the Aircraft Wiring List (AWL) (11RN, 12RN).

(4) Install the nut (104) and the lock plate (102) on the switch (105).
(5) Apply Threadlocking Adhesive-- Low strength - (Material No.05BAA1) between the nut (104) and the thread of the switch.
(6) Install the switch (105) in the handle.
(7) Make sure that the stop of the lock plate (102) is in its housing.
(8) Install the washer (103), nut (109) and tighten the nut (109).
(9) Apply Threadlocking Adhesive-- Low strength - (Material No.05BAA1) on the thread of the switch.
(10) Install the trigger (110), washer (111) and the nut (112).
(11) TORQUE the nut (112) to between 0.0385 and 0.0315 m.daN (3.41 and 2.79 lbf.in )

.
(12) Make sure that the top of the trigger is flush with the handle.
If the top of the trigger is not flush with the handle, do these steps:
(a) Remove the nut (112), washer (111) and the trigger (110).
(b) Loosen the nut (109).
(c) Temporarily install the trigger and turn the nut (104) until the trigger is in the correct position.
(d) Tighten the nut (109).
(e) Install the trigger (110), washer (111) and the nut (112).
(f) TORQUE the nut (112) to between 0.0385 and 0.0315 m.daN (3.41 and 2.79 lbf.in )

.
(13) Install the blanking plug (113).
(14) Apply a thin layer of Silicone Sealant-Firewall High Temp. - (Material No.06BHG1) in the recess for the cover plate (101).
(15) Install the cover plate (101).
(16) Apply Threadlocking Adhesive-- Low strength - (Material No.05BAA1) on the threads of the screws (100).
(17) Install the screws (100) and tighten them.
(18) Cut and remove the unwanted sealant from around the cover plate (101).
(19) Apply a thin layer of black paint, if necessary.
(20) Connect the cables of the switch (105) to the electrical connector (107) with the extraction/insertion tool P/N M81969/14.01 from the DMC519 ELECTRICIAN SERVICE TOOL KIT ESPM 2056420.

Electrical Wiring of the Captain Side-Stick Handle

Electrical Wiring of the First Officer Side-Stick-Handle

(21) Put the electrical connectors (106) and (107) in position.
(22) Apply Threadlocking Adhesive-- Low strength - (Material No.05BAA1) on the threads of the screws (108).
(23) Install the screws (108) and tighten them.

5. Close-up
Subtask 27-92-41-410-061-A

A. Install the control handle (Ref. AMM TASK 27-92-41-400-006).

[Rev.10 from 2021] 2026.03.31 23:59:13 UTC