Power Plant Flashcards
Describe the F100 engines ?
Two Rolls Royce Tay twin spool, bypass turbofan engines
The Low Pressure (LP) spool comprises ?
A single-stage fan and a three-stage Intermediate Pressure (IP) compressor driven by a three stage LP turbine
The High Pressure (HP) spool consists of ?
A twelve-stage HP compressor driven by a two
stage HP turbine
The engine is started by an air starter motor which drives … ?
The HP shaft
via the high speed gearbox
How many ignitors are installed per engine ?
2
An engine overheat alert will be presented if ?
Air from the compressor which is being used to cool certain parts of te engine exceeds a predetermined temperature
The oil tank is located where ?
The lower left-hand side of the engine
The engine oil system consists of what 3 main components ?
- A single pressure pump
- A fuelcooled oil cooler
- A filter
Scavenge oil is returned
to the tank by how many scavenge pumps ?
5
During engine start what is shut off and inhibited from the starting engine ?
The air conditioning packs are shut off, and the output of hydraulic and
pneumatic power from the respective engine is inhibited
On A and T types if the ignition selector is placed in NORMAL which ignitor will activate ?
The ignition for the respective engine is activated if an
engine failure or engine-out condition is sensed.
Ignition system 1 is activated if the EFSU senses an engine failure, OR EMUX
senses an engine-out condition.
Ignition system 2 is activated when the EMUX senses an engine-out condition.
On G type aircraft if the ignition selector is placed in NORMAL which ignitor will activate ?
Igniter 1
On all aircraft variants if the ignition selector is placed in the RELIGHT position which igniters are activated ?
BOTH (irrespective of START p/b and FUEL
lever positions)
Fuel is supplied from the aircraft fuel system via what 5 main components to the engine combustion chamber ?
- An engine-driven LP fuel pump
- An oil cooler,
- An oil filter
- A Fuel flow ransmitter
- An Engine-driven HP fuel pump
To reduce engine acceleration time from idle to go-around, thrust idle N2 is
increased when …(1) with normal (low) idle being regained …(2)… seconds after touchdown ?
- Landing gear is lowered
- 5 seconds
When the flight control lock is on, forward thrust lever movement is
limited to approximately ?
80 % N2
The engine thrust reverser doors are operated by which hydraulic system ?
System 1
In case the N1 is within the restricted reverse range (between 57 per cent and 75 per cent) for more than 2 seconds but less than 7 seconds, what is the alert that will be displayed ?
A level 2 alert “N1 REV RESTR ENG 1(2)” will be presented
and the affected N1 tape will color amber
In case the N1 is within the restricted reverse range (between 57 per cent and 75 per cent) for more than 7 seconds, what is the alert that will be displayed ?
A level 3 alert “N1 REV RESTR ENG 1(2)” will be presented, the affected N1 tape will color red and a latched status message “FAN 1(2) INSP REQD” will be set.
When both AT channels have failed or are selected off at the FLIGHT
AUGMENTATION panel, the EPR target can be manually set by ?
By rotating the the MAN EPR (outer knob position) on the TRP
The parameters and engine-out data for each engine are processed by a ?
Dual channel Engine Multiplexer (EMUX)
When the engine N2 decays to below Idle RPM the EMUX provides engine-out data to which displays and systems
- MFDS
- AFCAS
- FWC
- The air conditioning system
- Engine anti-icing system
- Engine ignition system
A dual channel …… is installed to detect an engine failure ?
Engine Failure Sensing Unit (EFSU)
The EFSU receives inputs from what sources ?
The N1’s and thrust lever position of both
engines.
The EFSU provides for the rapid detection of large thrust loss of one
engine during what phases of flight ?
Take-off, climb, or cruise when both thrust levers are positioned to above MIN TO
The EFSU provides an engine failure signal to what systems ?
- The AFCAS,
- The FWC
- The air conditioning system, and
- The engine ignition system
When is the EPR target symbol on the engine page not shown ?
The EPR target is not presented when:
1. NAP mode is selected
2. During descent, or
3. When AFCAS controls the speed
