CHART 3004. TROUBLESHOOTING (PROPELLER DEICER SYSTEM) (cont)
Trouble
Cause
Remedy
Ammeter shows normal
Open between brush
If there is voltage to brush
current part of cycle,
block assembly and
block wire harness plug,
zero current rest of
deicer lead straps.
try voltage at junction to
cycle. (cont.)
deicer lead and slip ring
Lead. If no voltage. find and
correct open in wiring
within brush block or no
contact of brush to slip
ring.
No ground circuit, one
If voltage is found at
engine.
deicer leads, locate and
fix open from deicer to
ground.
Ammeter shows normal
Open or high resistance in
Disconnect deicer leads
current part of cycle,
deicer or slip ring leads.
to check resistance. If not
low current rest of
OK, replace faulty deicer.
cycle.
If satisfactory, locate and
fix open in slip ring leads.
Check deicer wire harness
leads for continuity. Ohmmeter
needle must not
flicker when leads are
stretched or flexed. Replace
as required.
High resistance in circuit
Check for contact of brush
with low current.
to slip ring. Check wiring
from timer to deicers for
loose or corroded connections
and partially broken
wiring. Correct as required.
Ammeter shows low current
Aircraft voltage low.
Check voltage into switch.
over entire cycle.
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
3 0 - 6 2 - 0 0
Page 30-24
Revised: May 15, 1989
2E4
PIPER AIRCRAFT
Summary of Contents for SEMINOLE PA-44-180
Page 38: ...CHAPTER DIMENSIONS AND AREAS 1B14...
Page 49: ...CHAPTER LIFTING AND SHORING 1C1...
Page 53: ...CHAPTER LEVELING AND WEIGHING 1C5...
Page 58: ...CHAPTER TOWING AND TAXIING 1C10...
Page 62: ...CHAPTER PARKING AND MOORING 1C14...
Page 65: ...CHAPTER REQUIRED PLACARDS 1C17...
Page 70: ...CHAPTER SERVICING 1C22...
Page 98: ...CHAPTER STANDARD PRACTICES AIRFRAME 1E2...
Page 108: ...CHAPTER ENVIRONMENTAL SYSTEM 1E12...
Page 189: ...CHAPTER AUTOFLIGHT 1H21...
Page 192: ...CHAPTER COMMUNICATIONS 1H24...
Page 202: ...CHAPTER ELECTRICAL POWER 1I10...
Page 228: ...CHAPTER EQUIPMENT FURNISHINGS 1J12...
Page 233: ...CHAPTER FIRE PROTECTION 1J17...
Page 238: ...CHAPTER FLIGHT CONTROLS 1J24...
Page 304: ...2A18 CHAPTER FUEL...
Page 325: ...2B17 CHAPTER HYDRAULIC POWER...
Page 357: ...2D1 CHAPTER ICE AND RAIN PROTECTION...
Page 414: ...CHAPTER LANDING GEAR 2F13...
Page 479: ...2I6 CHAPTER LIGHTS...
Page 488: ...2I16 CHAPTER NAVIGATION AND PITOT STATIC...
Page 503: ...2J7 CHAPTER OXYGEN...
Page 524: ...2K6 CHAPTER VACUUM...
Page 535: ...2K19 CHAPTER ELECTRICAL ELECTRONIC PANELS AND MULTIPURPOSE PARTS...
Page 546: ...INTENTIONALLY LEFT BLANK PA 44 180 180T AIRPLANE MAINTENANCE MANUAL 2L6 PIPER AIRCRAFT...
Page 547: ...2L7 CHAPTER STRUCTURES...
Page 582: ...CHAPTER DOORS 3A18...
Page 593: ...CHAPTER STABILIZERS 3B8...
Page 604: ...CHAPTER WINDOWS 3B22...
Page 611: ...CHAPTER WINGS 3C10...
Page 624: ...CHAPTER PROPELLER 3D1...
Page 643: ...CHAPTER POWER PLANT 3D21...
Page 667: ...CHAPTER ENGINE FUEL SYSTEM 3F1...
Page 681: ...CHAPTER IGNITION 3F16...
Page 712: ...CHAPTER ENGINE INDICATING 3H1...
Page 730: ...CHAPTER EXHAUST 3H19...
Page 734: ...CHAPTER OIL 3I1...
Page 743: ...CHAPTER STARTING 3I11...
Page 755: ...CHAPTER TURBINES 3J1...