Systems - Engines Flashcards
1
Q
Engine Start Abort Criteria
A
- No positive oilpressure indication within 10 seconds after N2 speed starts to increase.
- During engine start with a tailwind, when a positive increase of N1 is not indicated before starter cutout (50%N2). In this case, the airplane is repositioned prior to engine start to minimize tailwind effects.
- No ITT indication within 30 seconds after initiation of fuelflow (no lightoff).
- ITT exceeds start limit (815°C-Hot).
- Oil pressure stabilizes below the engine limits.
- N1 and/orN2 failing to accelerate to stable idle speed (hungstart).
- An intermittent electrical pneumatic or starter malfunction occurs before the starter disengagement.
2
Q
Engine Start Parameters
A
- Times Start: at initial N2 rotation
- 10 seconds: Positive Oil Pressure
- 7% N2: Monitor ignition
- 20% N2: Verify Fuel Flow
- Light-off: Within 30 seconds after fuel flow
- N1 Rotation: Prior to Start Cutout (approximately 50%)
- 50% N2: Verify IGN A (B) goes out
- Engine Stabilization: ITT tick mark moves.
3
Q
When will ATTCS provide reserve thurst automatically?
A
- Difference between both engine N1 values is greater than 15%
- One engine failure during takeoff.
- One engine failure during go-around.
- Windshear warning.
4
Q
What type of engines does the E175 have?
A
CF34-8E5
5
Q
Can you change the thrust mode manually?
A
Yes, via the TRS page on the MCDU.
6
Q
What’s the difference between MAX and TOGA?
A
About 1,200 lbs of thrust.
7
Q
When will thrust change from TO to CLB.
A
- Landing gear retracted
- Airplane is above 400 AGL
- Any Change in vertical mode
8
Q
When will thrust change from CLB to CRZ?
A
Airplane is level at the preselected altitude for 90 seconds and,
The airspeed is within 5 kts (or .01 M) from preselected airspeed.
9
Q
When will thrust change to CON?
A
Automatically if engine fails at or above 3,000 AGL
Manually if selected in the MCDU (TRS page)
10
Q
When will thrust change from CRZ to GA?
A
