Section 07 - Powerplant Flashcards
What is indicated by a red “FUEL FILTER” CAS message?
The fuel filter is clogging, and engine operation may become erratic
What is the air start envelope (airspeed and altitude)?
200-324 KCAS, 25,000 feet or below
When is the crew required to check engine oil?
5 to 30 minutes after engine shutdown at the termination of the last flight of the day, or at intervals not exceeding 11 hours of cumulative flight time
During a normal engine start, ignition indications will be seen when the pilot completes which action?
Selection of the left or right engine START switch
Gulfstream wants engine vibration levels to be below 0.60 LP, and 0.60 HP under normal operating conditions. What must be accomplished if vibration levels exceed those values?
Engine thrust should be reduced until EVM is below 0.60 LP/HP
In the event a thrust reverser deploys in flight:
The power lever on the respective engine will move to the idle position
What is the minimum bleed air pressure indication prior to an engine start?
25 psi minimum·
What is an important consideration when performing an engine start with a tailwind component?
Allow engine to achieve max cranking HP RPM, and verify that positive LP RPM is achieved prior to selecting the HP fuel cock to OPEN
Will an engine start if the power lever is not at idle?
Yes, and the engine will accelerate to the thrust setting selected by the power lever
If peak EVM values exceed the alert level during engine start, what action must be performed?
Normally no action is required
When should the “SVO” and “IGN” indications extinguish after start?
At approximately 44.5% HP RPM
After starting both engines, you discover that the right pack is OFF and the isolation valve is OPEN. What is the most likely cause?
The START MASTER switch is still ON because you haven’t performed the After Starting Engines Checklist
What would you expect to see when conducting the Engine Vibration Monitor Test {EVM)?
Amber EVM indications at 2.0 plus or minus 0.2
What is the only method of engine airstart?
Windmilling airstarts
If an HP fuel cock is stuck in the OPEN position and will not move, what is the likely cause of the problem?
An LP shaft failure has occurred
Why is the engine fuel temperature checked on the taxi/before takeoff checklist?
To ensure that the engine oil temperature and the engine fuel temperature values are similar
What is the purpose of the engine over-fueling solenoid?
To aid in engine acceleration during high bleed-air demand conditions
What 3 indications are necessary prior to opening the HP fuel cock during a normal engine ground start?
- 15% HP RPM
2. Positive LP RPM 3. Ignition
When checking the engine oil sight glass, what precaution should be observed?
Ensure that you are reading the markings on the side of the gauge that correspond to the engine in question
What is the minimum altitude for autothrottle engagement?
50 feet AGL on approach
What are the conditions that must be met in order to engage the autothrottles?
- An EPR limit must be selected
- LP RPM split less than 20%
- HP RPM greater than 41 %
- SAT warmer than -80°C
- Autothrottle button on the FGP must be armed
- A valid speed target must be displayed
- Isolation valve must be closed
- Flight director must be in the takeoff mode (ground only) EPR must be greater than 1.17 (ground only)
When is autothrottle operation not permitted?
During takeoff or go-around with wing anti-ice selected ON
Will the autothrottles engage during takeoff or go-around with the wing anti-ice selected ON?
Yes
Where can you find information regarding approved fuel grades and additives?
In the AFM, Section 1 (Limitations) or the QRH, Supplemental Data
What is the maximum ground start TGT?
700° C, momentarily
What is the maximum air start TGT?
780° C, momentarily
What are the minimum engine idle speeds?
- Approach idle: 67% HP RPM
2. Ground idle: 46.6 HP RPM
What is the time limitation on the use of takeoff or go-around power?
5 minutes on 2 engines, 10 minutes during single-engine operation
What is the engine static ground run limitation?
With crosswinds greater than 15 knots, stabilized engine operation in the band between 60% and 80% LP RPM is not permitted
During landing roll, describe the suggested limit on the use of reverse thrust.
Cancellation of reverser thrust should be initiated by 70 KCAS so as to be at reverse idle by normal taxi speed
Describe the limitation associated with the starter duty cycle for a normal start.
Continued use of the starter is limited to three crank cycles, with a maximum of 30 seconds each. Delay 3 minutes between start attempts. After 3 cycles, delay use of starter for at least 15 minutes
If a thrust reverser unlocks or deploys in flight and the emergency stow switch is used, will the other thrust reverser be available on landing?
No
What is the maximum TGT limit for takeoff?
716-800°C (5 minute limit)
What is the maximum TGT limit for- maximum continuous operations?
715°C (unrestricted)
What is the maximum LP% RPM limit {overspeed)?
98.30%
What is the maximum HP% RPM limit {overspeed)?
102.60%
What are the minimum oil pressures?
- Minimum at idle: 16 psi
- Minimum acceptable for takeoff: 30 psi
- Minimum to complete a flight: 25 psi at max continuous
What is the maximum oil temperature?
105°C (oil temperature up to 120°C for a maximum of 15 minutes is permissible)
What are the minimum oil inlet temperatures?
- Minimum for starting: -40°C 2. Minimum for opening a power lever: -30°C
During engine starting, the fuel flow indication is unusually high and TGT begins to rapidly approach the TGT starting limit. You have elected to terminate the start. Describe the abnormal procedures associated with a HOT START.
- HP Fuel Cock (Affected Engine) – SHUT
- Affected Engine - CONTINUE TO MOTOR FOR 30 SECONDS
- START MASTER – OFF
During engine starting, the right engine’s starter failed to cut out. The SVO icon has turned amber and is flashing. Describe the START VALVE FAILURE TO CLOSE AFTER ENGINE START procedure associated with this condition.
- Start Master Switch - PRESS/ CHECK LIGHT OUT
- Both Bleed Air Switches - OFF
- APU Air (or External Air) - OFF
- When bleed air pressure stabilizes at minimum value (minimum 30 seconds), Engine - SHUT DOWN
- Notify maintenance before further start attempt
During the approach, a loud bang and vibration was felt coming from the right engine. You have decided to secure the engine. Describe the ENGINE FAILURE / SHUTDOWN IN FLIGHT procedure associated with this condition.
- Operating Engine Power Lever – ADJUST
- Engine Synchronizer – OFF
- Power Lever (Failed Engine) – IDLE
- HP Fuel Cock (Failed Engine) - SHUT
- Tone Warning - SILENCE
- Proceed with the ONE ENGINE INOPERATIVE LANDING checklist
Following an engine failure, the need to accomplish an inflight engine start is required. Describe the AIRSTART-NORMAL procedures associated for this requirement.
Review the Airstart-Normal checklist and the inflight start envelope. This checklist includes the re-configuration of various systems for a proper restart. If either HP or LP RPM is not indicating, suspect possible internal engine damage. Do not restart the engine. Windmilling starts above 25,000’ are not assured.
An engine failure has occurred. Describe the ONE ENGINE INOPERATIVE LANDING profile for this condition.
Approach planning is the key behind a successful One Engine Inoperative Approach and Landing procedure.
An engine failure has occurred. Describe the ONE ENGINE INOPERATIVE GO-AROUND profile for this condition.
- Power Lever - GO-AROUND POWER ON OPERATING ENGINE
- Flaps - 20°
- Airspeed - APPROACH CLIMB
- Landing Gear - UP (after positive rate of climb established)
- Altitude - CLIMB TO 1,500 FEET ABOVE AIRPORT LEVEL
- Flaps - UP AT VREF FOR 20° FLAPS + 20 KCAS
- Airspeed - MAINTAIN FOR ADEQUATE STALL MARGIN
- Operating Engine Power Lever - MAX CONTINUOUS POWER
A red “L REV UNLOCK” CAS message has illuminated during cruise. Describe the emergency procedure associated with this condition.
- Reverse Levers - VERIFY DOWN
- Affected Engine Power Lever - IDLE
- Airspeed - DO NOT EXCEED 200 KCAS
- T/REV Emergency Stow Switch - PRESS
- Airplane - LAND AS SOON AS PRACTICAL
- Reverse Thrust - DO NOT USE
