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
10
16
Rev. No:
Rev. Date:
1
25.08.2014
4.
Accomplishing a function test of all relays
Depending on installation, test the following relays:
•
Battery Relay (located in the Junction-Box on the
firewall)
•
Alternator Relay (located in the Junction-Box on the
firewall)
•
Glow Relay (located in the Junction-Box on the
firewall)
•
Main Bus Relay, only C172 F,G,H,I,K,L,M,N,P
(located on the LH of the airframe, underneath the
Panel LH)
A.
Accomplish the function test of the Battery Relay
(1)
Battery Switch - ON
(2)
AED, CED illuminate (without data)
(3)
Fuel Pump functional (switch Fuel Pump)
(4)
=> Battery Relay OK
(5)
Battery Switch - OFF
B.
Accomplish the function test of the Alternator
Relay
(1)
Battery Switch - ON
(2)
Alternator Switch - ON (or c/b Alternator - push
in)
(3)
A voltmeter must indicate the same voltage at
the Alternator (Terminal Wire 3) as at the battery
(4)
Alternator Switch - OFF (or c/b Alternator - pull
out): No voltage at the Alternator (Terminal Wire
3)
(5)
=> Alternator Relay OK
(6)
Battery Switch - OFF
(7)
Alternator Switch - ON (or c/b Alternator - push
in)
Содержание Cessna 172
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