CAS CAUTION MESSAGES
CAS CAPTION FAILURE DESCRIPTION PROCEDURE
NAME
AW139-RFM-4D
1(2) VHF COM OVHT Associated radio transmitter overheat VHF OVERHEAT
Section 3
EMERGENCY AND MALFUNCTION
PROCEDURES
COMMUNICATION SYSTEM
1(2)(3)(4)(5)(6)(7)(8)
AUDIO FAIL
Associated audio panel system failed
CAUTION
WHEN AUDIO PANEL 1/2 HAS BEEN REVERTED
TO BACK-UP MODE AUDIO TONES AND VOICE
WARNINGS CANNOT BE HEARD BY ON SIDE
CREW.
NOTE
Audio panel id: 1-Copilot, 2-Pilot, 3-Hoist Operator, 4-
Cabin Operator (if installed), 5-2nd Cabin Operator (if
installed), 6-7-8-Reserved
AUDIO PANEL
FAILURE
1(2) MRC OVHT Associated radio/nav modular system overheat MRC OVERHEAT
RADIO MASTER SYSTEM
The Radio Master system is designed to disconnect the electrical power
supply from selected radios to save battery power when helicopter is on the
ground and engines are being started or not running.
The system consists of a relay (K16) located inside the circuit breaker panel
in the overhead console and the RAD MSTR switch on the MISC panel in
the center console.
When the RAD MSTR switch is set to ON the relay is de-energized and
electrical power is available to all MRC modules.