R **ON A/C ALL
Subtask 21-26-41-710-050
B. Do an operational test of the ventilation system of the avionics equipment (Ref. TASK 21-26-00-710-001).
NOTE : As an alternative procedure, you can do the operational test of
____ the blower and extract fans (without the CFDS) (Ref. TASK 21-26-51-710-001).
5. Close-up
________
Subtask 21-26-41-410-051
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Close the access door 824 (Ref. TASK 52-41-00-410-002).
(3) Remove the access platform(s).
Subtask 21-26-41-865-055
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1HQ, 6HQ, 2HQ, 5HQ, 3HQ
Subtask 21-26-41-862-052
C. De-energize the ground service network
(Ref. TASK 24-42-00-862-001).
CHECK VALVE (2140HM) - INSPECTION/CHECK
_______________________________________ TASK 21-26-41-210-001 R Detailed Inspection of Check Valve Flappers for Condition and Operation WARNING : MAKE SURE THAT THE VENTILATION SYSTEM OF THE ELECTRONICS IS NOT IN
_______
OPERATION.
1. Reason for the Job
__________________
Refer to the MPD TASK: 212641-01
Make sure that the check valve operates correctly.
2. Job Set-up Information
______________________
A. Consumable Materials
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. 11-002 USA MIL-PRF-680
DRY CLEANING SOLVENT (VARSOL/WHITE SPIRIT)
(Ref. 20-31-00)
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
21-26-41-000-001 Removal of the Check Valve (2140HM)
21-26-41-400-001 Installation of the Check Valve (2140HM)
3. Job Set-up
__________ Subtask 21-26-41-020-051 R A. Remove the check valve (Ref. TASK 21-26-41-000-001). Subtask 21-26-41-110-050
B. Clean the check valve with CLEANING AGENTS (Material No. 11-002).
4. Procedure
_________ Subtask 21-26-41-210-051
A. Visual Inspection of the Check Valve.
(1)
Make sure that the check valve operates correctly, specially the valve clappers and their seats, the hinge pin and the return springs of the valve clappers. (make sure that there are no missing components, cracks, dents, marks or corrosion).
(2)
Make sure that the valve clappers move freely on their hinge pins. To do this, move them by hand. Also make sure that the clappers touch their seats correctly.
5. Close-up
________ Subtask 21-26-41-420-051
A. Install the check valve (Ref. TASK 21-26-41-400-001).
AVIONICS EQUIPMENT VENTILATION DUCTS - REMOVAL/INSTALLATION
___________________________________________________________ TASK 21-26-42-000-001 Removal of the Avionics Equipment Ventilation Duct CAUTION : USE ONLY THE GROUND SERVICE NETWORK TO SUPPLY ELECTRICITY BECAUSE THE
_______ AVIONICS VENTILATION SYSTEM IS NOT SERVICEABLE. IF YOU ENERGIZE THE AIRCRAFT ELECTRICAL CIRCUITS WITHOUT THE VENTILATION SYSTEM YOU WILL CAUSE DAMAGE TO ELECTRICAL EQUIPMENT.
1. Reason for the Job
__________________
This removal is necessary to do maintenance on the spherical bearing of the nose landing gear.
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific blanking plugs No specific warning notice No specific access platform 1.60 m (5 ft. 3 in.)
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
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