Component Maintenance Manual
EFFECTIVITY: ALL
21-00-22
Page
3001
JULY 21, 2011
DISASSEMBLY
TASK 21-00-22-00-801
5.0
R12 AIR CONDITIONING SYSTEM COMPONENT - DISASSEMBLY
SUBTASK 21-00-22-99F-010
5.1
General:
WARNING
: SERVICE TECHNICIANS ARE ADVISED TO OBSERVE STANDARD SAFETY
PRECAUTIONS, SUCH AS WEARING PERSONAL SAFETY GEAR, TO PREVENT INJURY WHILE
PERFORMING SERVICE TO THE UNIT.
CAUTION
: SERVICE TECHNICIANS MUST PREVENT CONTAMINATION OF INTERNAL SYSTEM
PLUMBING DURING ANY SERVICING AND/OR MAINTENANCE OPERATION. THIS INCLUDES NOT
ALLOWING THE RECEIVER DRYER TO BE EXPOSED TO ATMOSPHERIC CONDITIONS FOR ANY
LENGTH OF TIME. ALL PLUMBING LINES SHOULD REMAIN CAPPED WHENEVER POSSIBLE DURING
THE SERVICING OF THE SYSTEM.
CAUTION
: RECEIVER DRYER MUST BE REPLACED ANY TIME THE VCS PLUMBING IS OPENED FOR
MAINTENANCE. REFER TO DISASSEMBLY (SECTION 5) AND ASSEMBLY (SECTION 9).
NOTE
: Refer to Testing and Fault Isolation (Section 3) for establishing the condition of the component or
most probable cause of detected malfunction(s) to determine extent of disassembly required. Disassembly
should only be performed to the extent necessary to access any faulty subassembly.
5.1.1
Gain access to the system component or components requiring disassembly (refer to the
aircraft maintenance manual for removal of access panels and other hardware that might
need to be removed)
5.1.2
Verify that power is removed from aircraft. If it is not practical to remove aircraft power,
technician must pull and collar applicable circuit breakers.
5.1.3
Partial disassembly of system components and other subcomponents is required in order to
facilitate the required inspections in accordance with the inspection schedule (Section 7).
Disassemble the components just enough to perform the required inspection.
5.1.4
If replacement of any component is required, further disassembly may be required. If
component requires complete disassembly, keep all parts of each subassembly in a
separate and clean tray.
5.1.5
In the event that a component requires disassembly and the removal of refrigerant plumbing
lines or hoses, ensure that the system refrigerant charge has been recovered prior to
starting maintenance (refer to Servicing, Section 13).
NOTE
: Do not disassemble the parts unnecessarily.
5.1.6
Refer to Illustrated Parts Listing (IPL) for figure/item numbers (Section 11).
