D.C. GENERATION (cont.)
(2) Precautions (cont.)
(h) Before disconnecting a booster battery, reduce engine speed to idle, operate taxi light. This
will prevent voltage surge that could destroy small light bulbs.
(i) Disconnect the battery ground cable before connecting a charger to the battery.
(3) On Aircraft Check of Alternator System
(a) Visual Inspection
Prior to testing, a visual inspection of components of charging system should be performed.
What appears to be an authentic charging system problem, can in some instances be traced to
some of the discrepancies outlined here that are relatively simple to correct.
1 Proper belt tension. If alternator pulley wheel can be slipped on belt by hand the belt is
too loose or glazed. Replace or tighten belt per specification.
2 Specific gravity of battery is 1.275. Battery is +fully charged .
3 Clean and tighten battery posts and cable clamps.
4 Clean and tighten wiring connection at alternator.
5 Clean and tighten wiring connections at regulator.
(4) Ammeter Validity Test
With engine off, place “BAT” section of master switch in the ON position. Switch landing light
switch ON. Ammeter should show discharge. If ammeter needle does not move:
(a) Check wiring connections at ammeter are tight and clean, or;
(b) Ammeter is defective. Replace ammeter.
(5) Battery Supply Voltage Test
If aircraft ammeter shows discharge with engine running, perform the following test before
checking alternator voltage output. The test will verify that battery voltage is being supplied to
regulator. Alternator cannot provide output unless field voltage is supplied.
(a) Disconnect connector at voltage regulator.
(b) Connect voltmeter positive lead to pin 1 of disconnected plug (B lead of regulator) and
negative lead to aircraft structure.
(c) Turn Master Switch ON. (Bat and Alt). Voltmeter should read battery voltage. If voltage is
not present:
1 Check continuity of wiring harness from regulator plug to alternator circuit breaker.
2 Ensure that alternator regulator circuit breaker is closed and not defective.
(6) Voltage Output No-Load Test
This test as well as the following voltage output load test, should be performed whenever an
“overcharging” or “undercharging” condition is suspected.
Visual check as previously outlined, should be made and engine should be at normal operating
temperature .
(a) Connect voltmeter positive lead to positive battery terminal and negative lead to negative
battery terminal. Record Reading.
(b) Assure that all switches and lights are off - no load condition.
(c) Start engine and slowly increase speed to approximately 1500 rpm.
PIPER AIRCRAFT
PA-32R-301/301T
MAINTENANCE MANUAL
24-30-00
Page 24-24
Reissued: July 1, 1993
1K24
Summary of Contents for PA-32R-301T SARATOGA S
Page 26: ...CHAPTER 4 AIRWORTHINESS LIMITATIONS 1C1 ...
Page 29: ...CHAPTER 5 TIME LIMITS MAINTENANCE CHECKS 1C4 ...
Page 53: ...CHAPTER 6 DIMENSIONS AND AREAS 1D6 ...
Page 64: ...CHAPTER 7 LIFTING AND SHORING 1D21 ...
Page 68: ...CHAPTER 8 LEVELING AND WEIGHING 1E1 ...
Page 72: ...CHAPTER 9 TOWING AND TAXIING 1E5 ...
Page 76: ...CHAPTER 10 PARKING AND MOORING 1E9 ...
Page 80: ...CHAPTER 11 REQUIRED PLACARDS 1E13 ...
Page 92: ...CHAPTER 12 SERVICING 1F1 ...
Page 126: ...CHAPTER 20 STANDARD PRACTICES AIRFRAME 1G17 ...
Page 127: ...THIS PAGE INTENTIONALLY LEFT BLANK ...
Page 139: ...CHAPTER 21 ENVIRONMENTAL SYSTEMS 1H5 ...
Page 188: ...CHAPTER 22 AUTOFLIGHT 1J7 ...
Page 193: ...CHAPTER 23 COMMUNICATIONS 1J12 ...
Page 203: ...CHAPTER 24 ELECTRICAL POWER 1J22 ...
Page 263: ...CHAPTER 25 EQUIPMENT FURNISHINGS 2A13 ...
Page 269: ...CHAPTER 27 FLIGHT CONTROLS 2A20 ...
Page 332: ...CHAPTER 28 FUEL 2D11 ...
Page 363: ...CHAPTER 29 HYDRAULIC POWER 2E18 ...
Page 404: ...CHAPTER 30 ICE AND RAIN PROTECTION 2G16 ...
Page 470: ...CHAPTER 32 LANDING GEAR 3A13 ...
Page 550: ...CHAPTER 33 LIGHTS 3D24 ...
Page 562: ...CHAPTER 34 NAVIGATION AND PITOT STATIC 3E12 ...
Page 582: ...CHAPTER 35 OXYGEN 3F8 ...
Page 604: ...CHAPTER 37 VACUUM 3G6 ...
Page 616: ...CHAPTER 39 3G18 ELECTRIC ELECTRONIC PANELS MULTIPURPOSE PARTS ...
Page 620: ...CHAPTER 51 STRUCTURES 3G22 ...
Page 636: ...CHAPTER 52 DOORS 3H14 ...
Page 650: ...CHAPTER 55 STABILIZERS 3I4 ...
Page 662: ...CHAPTER 56 WINDOWS 3I16 ...
Page 670: ...CHAPTER 57 WINGS 3I24 ...
Page 688: ...CHAPTER 61 PROPELLER 3J18 ...
Page 704: ...CHAPTER 70 STANDARD PRACTICES ENGINES 3K10 ...
Page 708: ...CHAPTER 71 POWER PLANT 3K14 ...
Page 737: ...CHAPTER 73 ENGINE FUEL SYSTEM 4A13 ...
Page 749: ...CHAPTER 74 IGNITION 4B1 ...
Page 783: ...CHAPTER 77 ENGINE INDICATING 4C11 ...
Page 793: ...CHAPTER 78 EXHAUST 4C21 ...
Page 801: ...CHAPTER 79 OIL 4D5 ...
Page 805: ...CHAPTER 80 STARTING 4D9 ...
Page 819: ...CHAPTER 81 TURBINES 4D23 ...
Page 833: ...CHAPTER 91 CHARTS WIRING DIAGRAMS 4E13 ...