NOT: UWARNINGU: FAILURE TO DEACTIVATE THE THRUST REVERSER ISOLATION VALVE FOR GROUND MAINTENANCE COULD RESULT IN INADVERTENT THRUST REVERSER OPERATION WITH POSSIBLE INJURY TO PERSONNEL AND / OR DAMAGE TO EQUIPMENT.
Example:
WRITE: UWARNINGU: MAKE SURE THAT THE OXYGEN TUBES ARE FULLY CLEAN. THIS WILL HELP TO PREVENT CONTAMINATION AND EXPLOSIONS.
NOT: UCAUTIONU: EXTREME CLEANLINESS OF OXYGEN TUBES IS IMPERATIVE.
RULE: 7.3 If necessary, add a brief explanation to a warning or a caution to give a clear idea of the possible risk.
A warning or caution will be more effective if a brief explanation is added. An explanation gives the technician a reason for the warning or caution. It also gives a clear idea of the possible risk if the technician does not obey the instructions.
Example:
WRITE: UCAUTIONU: BEFORE YOU OPEN THE THRUST REVERSER HALVES, MAKE SURE YOU ENGAGE THE GRABBER. IF THE GRABBER IS NOT ENGAGED, DAMAGE TO THE PYLON STRUCTURE CAN OCCUR.
NOT: UCAUTIONU: THE GRABBER MUST BE ENGAGED BEFORE THE THRUST REVERSER HALVES ARE OPENED.
Example:
WRITE: UCAUTIONU: MAKE SURE YOU USE MORE THAN ONE HOLD-OPEN ROD TO HOLD THE THRUST REVERSER IN POSITION. THIS WILL HELP PREVENT DAMAGE TO THE THRUST REVERSER.
NOT: UCAUTIONU: USE MORE THAN ONE HOLD-OPEN ROD WHEN OPENING THE THRUST REVERSER.
RULE: 7.4 Identify your command correctly as a warning or caution.
The brief explanation and risk statements that you add to a command will help you to identify it clearly as a warning or as a caution.
Example:
WRITE: UWARNINGU: MAKE SURE THAT THE OXYGEN TUBES ARE FULLY CLEAN. OXYGEN AND OIL OR GREASE MAKE AN EXPLOSIVE MIXTURE. AN EXPLOSION CAN CAUSE DEATH OR INJURY TO PERSONNEL AND / OR DAMAGE TO EQUIPMENT.
NOT: UCAUTIONU: EXTREME CLEANLINESS OF OXYGEN TUBES IS IMPERATIVE.
RULE: 7.5 If a condition is necessary before the technician continues, put the condition first in the warning or caution.
If there is a condition that is necessary before the technician does the command, put the condition first to make sure the technician will see it.
Example:
WRITE: UCAUTIONU: BEFORE YOU OPEN THE CIRCUIT BREAKERS, MAKE SURE THE EMERGENCY POWER AND LIGHT SWITCHES ARE IN THE "OFF" POSITION. THIS WILL HELP TO PREVENT DAMAGE TO THE EQUIPMENT.
NOT: UCAUTIONU: THE EMERGENCY POWER AND LIGHT SWITCHES SHOULD BE IN THE "OFF" POSITION PRIOR TO OPENING THE CIRCUIT BREAKERS.
Example:
WRITE: UWARNINGU: BEFORE YOU MOVE THE AILERONS AND AILERON CONTROL TABS, MAKE SURE THE AREA AROUND THE AILERONS ARE CLEAR OF PERSONNEL AND EQUIPMENT. THIS WILL HELP TO PREVENT INJURIES TO PERSONNEL AND / OR DAMAGE TO THE EQUIPMENT.
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