2. Remove the spark plug from the engine. In the course of engine operation, carbon and other
combustion products will be deposited on the end of the spark plug and will penetrate the lower threads to
some degree. As a result, greater torque is frequently required for removing a plug than for its installation.
Accordingly, the torque limitations given do not apply to plug removal and sufficient torque must be used to
unscrew the plug. The higher torque in removal is not as detrimental as in installation, since it cannot stretch
the threaded section. It does, however, impose a shearing load on this section and may, if sufficiently severe,
produce a failure in this location.
—NOTE—
Torque indicating handle should not be used for spark plug
removal because of the greater torque requirement.
3. Place spark plugs in a tray that will identify their position in the engine as soon as they are removed.
—NOTE—
Spark plugs should not be used if they have been dropped.
4. Removal of seized spark plugs in the cylinder may be accomplished by application of liquid carbon
dioxide by a Conical metal funnel adapter with a hole at the apex just large enough to accommodate the funnel
of a CO2 bottle. (Refer to Figure 74-44.) When a seized spark plug cannot be removed by normal means, the
funnel adapter is placed over and around the spark plug. Place the funnel of the CO2 bottle inside the funnel
adapter and release the carbon dioxide to chill and contract the spark plug. Break the spark plug loose with a
wrench. A warm cylinder head at the time the carbon dioxide is applied will aid in the removal of an
excessively seized plug.
5. Do not allow foreign objects to enter the spark plug hole.
INSPECTION AND CLEANING OF SPARK PLUG.
1. Visually inspect each spark plug for the following non-repairable defects:
A. Severely damaged shell or shield threads nicked up, stripped or cross threaded.
B. Badly battered or rounded shell hexagons.
C. Out-of-round or damaged shielding barrel.
D. Chipped, cracked or broken ceramic insulator portions.
E. Badly eroded electrodes worn to approximately 50% of original size.
2. Clean the spark plug as required, removing carbon and foreign deposits.
3. Set the electrode gap at .015 to .018 inches.
4. Test the spark plug both electrically and for resistance.
Effectivity
74-22-02
PA-28RT-201
Page 74-38
December 1, 1978
3E23
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL
Содержание Arrow IV
Страница 18: ...CHAPTER AIRWORTHINESS LIMITATIONS 1A18...
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Страница 22: ...CHAPTER TIME LIMITS MAINT CHECKS 1A22...
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Страница 40: ...CHAPTER DIMENSIONS AND AREAS 1B16...
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Страница 53: ...CHAPTER LIFTING AND SHORING 1C5...
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Страница 57: ...CHAPTER LEVELING AND WEIGHING 1C9...
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Страница 62: ...CHAPTER TOWING AND TAXIING 1C14...
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Страница 66: ...CHAPTER PARKING AND MOORING 1C18...
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Страница 70: ...CHAPTER REQUIRED PLACARDS 1C22...
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Страница 77: ...CHAPTER SERVICING 1D5...
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Страница 110: ...CHAPTER STANDARD PRACTICES AIRFRAME 1E14...
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Страница 117: ...CHAPTER ENVIRONMENTAL SYSTEM 1E21...
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Страница 169: ...CHAPTER AUTO FLIGHT 1H1...
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Страница 176: ...CHAPTER COMMUNICATIONS 1H8...
Страница 185: ...CHAPTER ELECTRICAL POWER 1H17...
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Страница 233: ...CHAPTER FLIGHT CONTROLS 1J17...
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Страница 297: ...CHAPTER FUEL 2A18...
Страница 320: ...CHAPTER HYDRAULIC POWER 2B17...
Страница 355: ...CHAPTER LANDING GEAR 2D4...
Страница 418: ...CHAPTER LIGHTS 2F19...
Страница 430: ...CHAPTER NAVIGATION AND PITOT STATIC 2G7...
Страница 444: ...CHAPTER OXYGEN SYSTEM 2G21...
Страница 464: ...CHAPTER VACUUM SYSTEM 2H17...
Страница 473: ...CHAPTER ELECTRICAL ELECTRONIC PANELS AND MULTI PURPOSE PARTS 2I2...
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Страница 477: ...CHAPTER STRUCTURES 2I6...
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Страница 496: ...CHAPTER DOORS 2J1...
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Страница 505: ...CHAPTER STABILIZERS 2J10...
Страница 514: ...CHAPTER WINDOWS 2J19...
Страница 519: ...CHAPTER WINGS 2J24...
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Страница 550: ...CHAPTER PROPELLER 3A18...
Страница 565: ...CHAPTER STANDARD PRACTICES ENGINE 3B9...
Страница 568: ...CHAPTER POWER PLANT 3B12...
Страница 592: ...CHAPTER ENGINE FUEL AND CONTROL 3C12...
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Страница 611: ...CHAPTER IGNITION 3D7...
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Страница 655: ...CHAPTER ENGINE INDICATING 3F16...
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Страница 664: ...CHAPTER EXHAUST 3G1...
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Страница 669: ...CHAPTER OIL SYSTEM 3G6...
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Страница 673: ...CHAPTER STARTING 3G10...
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Страница 688: ...CHAPTER TURBINES 3H1...
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Страница 694: ...CHAPTER 91 CHARTS AND WIRING DIAGRAMS 3H7...
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Страница 739: ...CHAPTER 95 SPECIAL PURPOSE EQUIPMENT 3K1...
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