Supplement Airplane Maintenance Manual
Cessna 172 with TAE 125-02-99 / -114
AMM-20-02
Chapter:
Issue:
Issue Date:
Page:
Content:
20-AMM-24-02
3
06.11.2013
2
16
Rev. No:
Rev. Date:
1
25.08.2014
24.30 DC GENERATION
PRECAUTIONS
The following precautions must be observed when testing the
electrical system.
WARNING: Failure to observe these precautions will result in serious
damages to the electrical equipment!
CAUTION: Refer to wiring diagram in Chapter 91, Section 91.10 when
installing or testing alternator.
CAUTION: Disconnect battery, excitation battery and backup battery before
connecting or disconnecting test instruments (except voltmeter),
or before removing or replacing any unit or wiring. Accidental
grounding or shorting at alternator with internal regulator (14V
version only), alternator without internal regulator (28V version
only), regulator (28V version only), excitation battery, ammeter
or accessories, will cause severe damage to units and/or wiring.
CAUTION: Disconnect main battery before connecting or disconnecting the
excitation or backup battery! The excitation battery wire from the
alternator (14V version) or from the regulator (28V version) may
carry electrical power even without connected excitation battery
in case the main battery is still connected to the system.
CAUTION: Grounding the alternator output terminal will damage alternator
and/or circuit and components!
CAUTION: Reversed battery connections will damage rectifiers, wiring,
regulator and other charging system components! Battery
polarity must be checked with a voltmeter before connecting
battery. The aircraft is negative ground.
CAUTION: If booster battery or fast charger is used, its polarity must be
connected correctly to prevent damage to electrical system
components!
To Next Page
Loading...
Need help?
General