Mooney M20TN, Service And Maintenance Manual

Page: 282 / 1169

MOONEY AVIATION COMPANY, INC.
M20TN SERVICE & MAINTENANCE MANUAL
Page
Date
10
2006
Rev Date
Press windshield De--Ice Switch. Check that de--icing
fluid is discharged from spraybars.
--
Check that wing ice inspection lamp functions. If night flight.
Switch off electrical power if no longer required. --
Check that fluid flows evenly from active zone of all po-
rous panels.
--
Check that fluid is discharged into the propeller slinger
ring from the nozzle fitted at the front of the engine
crankcase.
--
Check aircraft surfaces for ice or snow.
Remove all ice or snow from all flying surfaces. NOTE:
The TKS ice protection system is not intended to
remove frozen deposits while aircraft is on the
ground. It is essential that all critical areas are
de--iced before any attempt to T/O is made.
Level II
50 Hour Inspections
This level inspection extends the functions recommended for Level I inspections and includes more comprehen-
sive tests of a qualitative nature.
Maintenance Practice Notes
Remove engine cowling.
Check security and condition of visible components pay-
ing particular attention to those components attached to
the engine and spinner.
--
Switch electrical power ON.
Check contents display illuminated and stabilizes at a
sensible value within 1.5 minutes.
Replenish tank contents, if necessary.
If in doubt regarding accuracy of indication make cal-
ibration check.
Indicator is electronically damped and should rise from
0.0, at switch ON, at an average rate of about one dis-
play count per second.
Operate Airframe/Propeller system at “De--Ice.” Check
that both indicator LED’s flash RED then change to a
single GREEN (opposite De--Ice) as pressure rises.
Check that High Pressure Warning LED does not illumi-
nate.
--
Check operation of High Pressure Warning LED by de-
pressing High Pressure Reset. The AMBER LED should
illuminate while switch is depressed and cancel at
switch release.
NOTE:
Fluid should be exuded evenly over active zone
of porous panels. At high temperatures a “water-
line” may be observed at the top of some panels
due to insufficient pressure being developed to
expel entrained air. This is acceptable unless
performance of panel in icing conditions indi-
cates that this is other than a temporary nature.
Switch Airframe/Propeller system directly to “Anti--Ice,”
check pump speed reduces (audible) and that GREEN
LED which is illuminated changes to match switch selec-
tion.
Check that de--icing fluid flows from all porous panels
and that a jet is directed into the slinger ring from the
nozzle at the front of the engine.
--
Switch Airframe/Propeller system OFF. --
30--12--02