Component Maintenance Manual
12037 N Highway 99
Seminole, OK 74868
Phone (405) 382-0731
Fax (405) 382-0737
http://www.enviro-ok.com
Copyright © 2017
ATA 21-00-23
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Revision 10
June 1, 2017
8.3.1.3.1 If blower motor wheel is damaged, such as having bent or cracked blades,
removal and replacement is required (1134200-60/-61/-63 only). Refer to
Disassembly (Section 5) for removal procedures. Refer to Assembly (Section
9) for installation procedures. After completing the removal and installation of
the new blower wheel, perform functional check (Section 3). Contact Enviro
Systems customer service to order new blower wheel.
8.3.1.3.2 If blower motor scroll is damaged in any way, the entire Evaporator Module
Assembly must be removed and sent to Enviro Systems for repair. Contact
Enviro Systems customer service.
8.3.1.3.3 For the blower motor, if the Evaporator Module Assembly is P/N 1134200-42
(L) /-43 (C,R), removal and replacement of the entire evaporator module
assembly is required (refer to aircraft maintenance manual), as maintenance
of the evaporator blower motor is no longer supported. Contact Pilatus for
replacement evaporator. If Pilatus cannot support a replacement for the
1134200-42/-43 evaporator, contact Enviro Systems for replacement.
Replacement evaporator will be 1134200-60 (L)/-61(R)/-63 (C) and is not
compatible with older evaporator 1134200-42/-43. Therefore, if aircraft has
evaporator 1134200-42/-43 that has failed (left or right side), both the left and
right side evaporators must be changed together. The left and right
evaporators must all be either 1134200-42/-43 or 1134200-60(L)/-61(R), not a
combination of the two. After completing the removal and installation of the
new evaporator module assembly, perform functional check (Section 3).
8.3.1.3.4 If the Evaporator Module Assembly is 1134200-60/-61/-63 and blower motor is
damaged or is not operating to specifications, motor will need to be removed
and replaced (refer to Disassembly, Section 5 and Assembly, Section 9).
After completing the removal and installation of the new blower motor, perform
functional check (Section 3). Contact Enviro Systems customer service to
order a new component.
8.3.1.4
Condensate Drain
The condensate drain (part of the housing assembly) can, over time, become
damaged. It is essential that the drain remains in excellent condition for proper
operation of the evaporator coil assembly. If the condensate drain is damaged, the
entire assembly must be removed and sent to Enviro Systems for repair. Contact
Enviro Systems customer service.
8.3.1.5
Expansion Valve
The expansion valve can, over time, become damaged and/or not operate correctly. If
the expansion valve shows signs of damage or does not function properly, remove
and replace (refer to Disassembly, Section 5 and Assembly, Section 9).
