Deicers Innate. Indicator Light Does Not Function; Deicer Boots Don't Hold Their Form In Flight To System Inadequate - Piper PA-44-180 SEMINOLE Maintenance Manual

CHART 3001. TROUBLESHOOTING (PNEUMATIC DEICE SYSTEM)
Trouble
Deicers innate. indicator
light does not function.
(Ascertain that
deicer boot switch is
0N .)
Deicer boots do not
hold their form in
flight or vacuum to
the system inadequate.
PIPER AIRCRAFT
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
Cause
Indicator lamp burned
out.
System pressure not
being reached.
Pressure switch not
functioning.
Wires loose or broken.
Poor grounding of
pressure switch.
Deflate valve not
functioning properly
Vacuum line restricted.
Broken line.
2D8
Remedy
Replace lamp.
Check "Deicers Inflate
Slowly" above.
Make electrical test
and replace if required.
Make electrical test.
Repair or replace
broken wires. Check
for proper ground.
Remove and troubleshoot
valve. Replace
if necessary.
Disconnect line from
instruments and deflate
valve, and blow
out line.
Inspect system and repair.
Revised: May 15, 1989
3 0 - 11 - 0 0
Page 30-04