5.3.6 Verbal audio warning signals. Verbal warning signals shall be
audible signals in verbal form indicating the existence of a hazardous or
imminent catastrophic condition requiring immediate action and shall only be used to complement
red warning or other critical visual signals.The verbal warning signals shall
be presented at levels that will ensure operator reception under noise
conditions in the specific aircraft. There shall be provision for overriding
and resetting the signals. The signal, when activated, shall always start at
the beginning of the message and shall continue to be presented until
a. The causative condition is corrected.
b. A warning of higher priority is presented.
c. The signal is silenced by manual actuation of the override
The structure for verbal warnings shall be:
a. General heading, such as, the system or service
b. Specific subsystem or location.
c. Nature of emergency.
Verbal warning signals shall be as specified in