Power Plant/APU Flashcards
FLAP OPEN and LOW OIL LEVEL indications on the ECAM APU page.
FLAP OPEN:
▪ APU air intake flap is fully open.
▪ Flap is commanded open when APU MASTER SW pb is selected to ON.
▪ APU starter motor is inhibited until flap is fully open.
▪ APU’s oil tank quantity is sensed to be low.
▪ Indication would appear immediately when the APU MASTER SW pb is selected to ON and the aircraft is on the
ground.
NOTE: With LOW OIL LEVEL indicated, the APU START pb should not be selected to ON. Contact maintenance for assistance.
Indications when the APU is “On-Speed”.
AVAIL appears on apu start pb and ecam apu page
APU AVAIL appears on ECAM Memo section
APU MASTER SW pb.
ON
Lights out
Fault
ON: apu computer performs self-test
air intake flap opens
Light out: apu computer deactivated at apu shuts down
Fault: auto shutdown or failed start has occured
Explain why the aircraft batteries must be on for all APU starts and when the APU generator is the sole source of
electrical power.
Connects apu starter motor to the battery buses (the ony power source available to the starter motor)
On the ground, batteries provide power source for extinguisher discharge
APU BLEED pb and APU GEN pb.
APU BLEED: on commands apu bleed valve open
APU GEN: lights out, apu gen with auto energize once apu is on speed
OFF: apu gen is de-energized
uses of APU bleed air.
engine start and air conditioning pack operation
cannot be used for wing anti-ice
which start malfunction a FADEC cannot sense and therefore cannot automatically abort.
tailpipe fire
Recall how Continuous Ignition can be manually activated.
after engine start, cycle ENG MODE selector to norm then back to IGN/START
Recall the engine igniter displays on the ECAM ENGINE page.
displayed as A and B on ECAM ENGINE page
alternates between starts
AB indicates both igniters being used for continuous ignition
Recall the E/WD N1 gauge’s indications.
▪ Green
▪ Amber tick mark
▪ Red arc
▪ Circle
▪ Blue arc
▪ Boxed amber REV
▪ Boxed green REV
▪ Green digital numeric N1 speed and analog green line N1 speed.
▪ Amber tick mark – FADEC computed maximum N1 for current ambient conditions.
▪ Red arc – maximum permissible.
▪ Circle – current position of the associated thrust lever.
▪ Blue arc – indicates the difference between actual N1 and the thrust commanded by the autothrust system.
▪ Boxed amber REV – one or more of the reverser blocker doors is not stowed or not locked.
▪ Boxed green REV – all four reverser blocker doors are fully deployed.
meaning of the grey background of an N2 display on E/WD.
engine start in progress
functions of the controls and indicators on the ENG panel.
ENG MASTER 1(2) switches:
ON – initiates the automatic start sequence when ENG MODE selector is set to IGN/START
▪ OFF – shuts down the engine or aborts the start sequence
ENG MODE selector:
NORM
IGN/START
CRANK
NORM: normal operations following engine start
IGN/START: displays ECAM ENGINE page activates both fadecs pack valves close for 30 seconds increases apu speed after engine start, cont ignition
CRANK: no fuel of ignition supplied
displays ECAM ENGINE page
activates both fadecs
ENG panel Fault light
auto start aborted
disagreement between HP fuel valve commanded position and actual position
ENG MAN START pb is selected ON.
engine start valve opens if
IGN/START or CRANK is selected
bleed air pressure available
engine start valve closes at 50% N2 but ON light remains
