Engine Flashcards
Bleed value closes at? (rpm)
61% +- 4%rpm
Bleed valve opens at? (Rpm) when engine winds down
45% rpm
What does the bleed air system provide for?
Cabin conditioning system, anti-G, canopy seal
Anti icing for LP compressor nose fairing
Fuel tank press
Bleed valve operation
Cooling of engine bearings
Pressurising engine oil and air seals
What does the accessory gearbox drive
2 hydraulic pump Dc generator HP fuel pump LP fuel pump Oil pump Tachogenerator
EMP tgt and rpm blank/flash
RPM blank below 12%
Flashes above NH 104.3% NL 108.3
TGT flash > 606
Blank > 780
ECA provide output for?
Max TGT and RPM
Warning for TGT and RPM (T6NL)
ECA failure
Correct rotation of LP shaft (ROT)
ECA caption comes on if
Fault in either channel
TGT or NL limits exceeded with less than max signed sent to fuel trim valve solenoid
NL> 87% while TGT < 260deg
Oil caption comes on when…
Pressure differential below 10Psi
Between the internal gearbox feed and return oil
Igniters operates when….
Automatically during engine start
Relight button pressed with throttle closed/ within half inch from idle
IGN at norm
Igniters are energised for how Long?
Energised for 30sec after the relight button is pressed or
Throttle advanced beyond 1/2 inch of idle
ROT caption comes on when….
LP shaft turning 100RPM in correct direction and igniters are energised
GTS will stop automatically when…
Air starter does not run up to 82% within 30sec of pressing relight button
Engine does not reach 45% within 45sec
Engine passes starter motor cutoff speed (45%)
Cooling period between start cycles
3 mins, after 3 cycles wait 20mins
Assisted relight parameters
<20’000ft. 165-250kts
Cold relight parameters
Between 25’000 to 22’500ft
295-250kts
