Textron Cessna 172S Skyhawk SP, Information Manual

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CESSNA
MODEL 172S
SECTION 9 - SUPPLEMENTS
SUPPLEMENT.22 - FAA APPROVED
Power is supplied to the 12-volt Cabin Power System from a DC
to DC power converter located in the tailcone of the aircraft. The
power converter receives 28. VDC power from the "CABIN
LTS/PWR" circuit breaker located on the electrical switch/circuit
breaker panel. By using two small signal pins located in the Cabin
Power System ccnnector. the power converter will not supply power
to the Cabin Power connector when there is nothing plugged in.
Refer to 14 CFR 91.21andAdvisory Circular No. 91.21-1() "Use
of Portable Electronic Devices Aboard Aircraft" for further
information and requirements regarding. the use of portable
electronic devices in aircraft. .
SECTION
2
LIMITATIONS
The following limitations must be adhered to:
1. The 12 Volt Cabin Power System is not certified for supplying
power to flight-critical communications or navigation devices.
2. Use of the 12 Volt Cabin Power System is prohibited during
takeoff and landing.
3. Use ~f the 12 Volt Cabin Power System is prohibited under
IFR unless the operator of the aircraft has determined that the
use of the 12 VDC power supply and the connected portable
electronic device(s) will. not cause interference with the
navigation or.communication systems of the airplane.
SECTION 3
EMERGENCY PROCEDURES
There is no change to the airplane emergency procedures when
the 12 Volt Cabin Power System is installed. The system is
disabled by unplugging the power or adapter cable from the 12 Volt
Cabin Power System connector. In the event of an alternator
failure, load shedding of nonessential auxiliary equipment may be
accomplished by simply unplugging equipment from the connector.
Dec 30/00
. S22-5