(c)
The color of the readout, box and pointer changes from white to
red if the APU EGT redline limit is exceeded.N1 and N2 Rotor Speeds
(a)
APU N1 and N2 rotor speeds are represented by a 270 degree circular analog scale with a moving pointer, and as a digital readout enclosed in a box.
(b)
The rotor speed scales correspond to a range of 0-120 percent rpm. The analog pointer is limited at the minimum and maximum scale range, however, the digital readout will display the actual value if it exceeds the maximum scale range.
(c)
The color of the readout, box and pointer will change from
white to red if the APU N1 or N2 redline limit is exceeded.Oil Quantity
(a)
Displayed by a white colored digital readout with scaled units
(1.00 = 100% full). If a low APU oil quantity condition occurs, the color of the readout changes from white to magenta and the readout is followed by the message LO (low - quantity below 0.22) or RF (refill - quantity below 0.50).
Air/Ground Mode (AIR/GND MODE)
(a)
The APU controller mode is shown by one of the these messages: AIR (when in the air mode ) GND (when in the ground mode)
(b)
For an invalid mode no message is shown.Inlet Door
(a)
The inlet door position is shown by one of the these messages: OPEN (when the door is open) CLOSED (when the door is close)
(b)
For an invalid position no message is shown.Starter
(a)
The starter status is shown by one of the these messages: ON (when the starter is on) OFF (when the starter is off)
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(b) For an invalid status no message is shown.
(8)
Ignitor
(a)
The ignitor status is shown by one of the these messages: ON (when the ignitor is on) OFF (when the ignitor is off)
(b)
For an invalid status no message is shown.
(9)
Fuel Shutoff Solenoids (FUEL SOL'S)
(a) The status of the primary and secondary solenoids is shown by
one of the these messages: ON/ON (when the two solenoids are on) ON/OFF (when the primary is on and the secondary is off)
OFF/ON (when the primary is off and the secondary is on) OFF/OFF (when the two solenoids are off)##
(b) For an invalid status a / is shown.
(10)
Fuel Filter Bypass (F FILTER)
(a)
The fuel filter bypass status is shown by one of the these
messages:
BYPASS (when the filter is on)
NORM (when the filter is off)
(b)
For an invalid mode no message is shown.
(11)
APU Isolation Valve (BLEED VALVE)
(a)
The isolation valve status is shown by one of the these
messages:
OPEN (when the valve is open)
CLOSED (when the valve is closed)
(b)
For an invalid position no message is shown.
(12)
Pneumatic Loading Availability (PNEU AVAIL)
(a)
The pneumatic loading availability status is shown by one of
the these messages: ON (when pneumatic loading is available) OFF (when pneumatic loading is not available)
(b)
For an invalid status no message is shown.
(13)
Electrical Loading Availability (ELEC AVAIL)
(a) The electrical loading availability status is shown by one of
the these messages: ON (when electrical loading is available) OFF (when electrical loading is not available)
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(b) For an invalid status no message is shown.
(14) Pneumatic Operating Mode (OP MODE)
(a) The pneumatic operating mode is shown by one of the these
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