100 HOUR INSPECTION.
The mandatory 100 Hour Inspection shall be conducted on new heaters or overhauled heaters with a new
combustion tube assembly upon accumulation of 500 heater operating hours or twenty four months, whichever
occurs first, and thereafter at intervals not to exceed 100 heater operating hours or twenty four months, whichever
comes first. If an hourmeter is used on the heater assembly, it should be connected across terminals number 2
and 5 on the heater terminal strip. If an hourmeter is not used, count one heater operating hour for each two flight
hours for normal aircraft operation. Consideration should be given for any excessive ground operation of the
heating system.
— Note —
The 100 Hour Inspection consists of the functional check and inspection listed below
and the Pressure Decay Test.
1. Inspect the ventilating air and combustion air inlets and exhaust outlet for restrictions and security at the
airplane skin line.
2. Inspect the drain line to make sure it is free of obstructions. Run a wire through it if necessary to clear
obstructions.
3. Check all fuel lines for security at joints and shrouds, making sure that no evidence of leaks exists.
Also check for security of attachment of fuel lines at the various attaching points in the airplane.
4. Inspect electrical wiring at the heater terminal block and components for loose connections, possible
chafing of insulation and security of attachment points.
5. Inspect the high voltage cable connection at the spark plug to make sure it is tight. Examine the cable
sheath for any possible indications of arcing, which would be evidenced by burning or discoloration of
the sheath.
6. Inspect the combustion air blower assembly for security of mounting, connecting tubing and wiring.
Tighten any loose electrical terminals and air tube connections.
7. Operate both the combustion and ventilating air blowers and check for unusual noise or vibrations.
8. It is recommended that the condition of the spark plug be checked for operation as described in paragraph
titled “Spark Plugs”.
9. Evaluate the condition of the combustion chamber by performing a “Pressure Decay Test” as described in
Janitrol Maintenance and Overhaul Manual P/N 24E25-l (Revision dated October 1981).
10. Following the 100 hour inspection, perform the “Preflight and/or Daily Inspection”.
REMOVAL OF HEATER. (Refer to Figure 21-2)
1. Ascertain that all heater controls are off.
2. Remove the screw in the nose, lower nose cone to gain access to heater.
3. Disconnect the heater outlet duct from the heater manifold by removing the attachment screws.
4. Remove the clamp from the intake valve control cable and disconnect the control cable from the intake
valve.
5. Note the hookup of the electrical leads to facilitate reinstallation. Disconnect the leads from the heater
terminal block.
6. Disconnect the fuel supply line at the heater by removing the cover of the fuel line connection shroud and
disconnecting the line from the solenoid valve.
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
2 1 - 4 3 - 0 4
Page 21-15
Revised: May 15, 1989
1F6
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...