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EMB145 > Limitations > Flashcards

Limitations Flashcards

0
Q

The EMB145 is certified to operate on the transport category, under what flight conditions?

A

Under day and night; VFR, IFR, Icing conditions.

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1
Q

What is the minimum flight crew for the EMB145?

A

2 Pilots

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2
Q

What is the maximum temperature for aircraft operation?

A

ISA +35

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3
Q

What is the EMB145 maximum runway slope for takeoff and landing?

A

+/- 2% of the runway length.

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5
Q

What is the maximum tailwind component for takeoff and landing on the EMB145?

A

10 kts.

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6
Q

What is the minimum and maximum pressure altitude for takeoff and landing on the EMB 145LR/XR?

A 
LR = (-1,000'/8,000')
XR = (-1,000'/10,000')
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7
Q

What is the minimum and maximum SAT at FL370?

A

-65/-21.5*C.

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8
Q

What is the minimum and maximum SAT for takeoff and landing?

A

-40/52C. MX inspection is required when landing below -40C.

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9
Q

What is the minimum SAT bellow FL250?

A

-54*C

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10
Q

What is the minimum TAT above FL250?

A

-45C. Momentary deviation up to -50C is acceptable.

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11
Q

What is the max speed for flaps 22 on the EMB 145XR above 10,000’ with YD disengaged?

A

180 knots.

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12
Q

What is the max speed for flaps 45 on the EMB 145XR above 10,000’ with YD disengaged?

A

145 knots.

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13
Q

What is the max airspeed after takeoff without re-trimming?

A

160 knots.

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14
Q

What happen if the flaps 45 speed is momentarily exceeded on a none XR aircraft?

A

Nothing, the flaps 45 speed of 145 knots may be momentarily exceeded up-to 160 knots and no necessary MX action is required.

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15
Q

What is the maximum airspeed for turbulent air penetration? (Above and bellow 10,000’)

A

Below 10,000’: 200Knots

Above 10,000’: 250 knots or .63M, whichever is lower.

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16
Q

What is the maximum windshield wiper operating speed?

A

170 Knots.

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17
Q

What is the maximum fuel imbalance between tanks?

A

800 Lbs.

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18
Q

What are the minimum and maximum fuel tank temperatures for the EMB145?

A

-40/52*C

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19
Q

What is the maximum N1?

A

100% N1.

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19
Q

What is the min/max oil pressure >= 88% N2 for the EP/LR models?

A

The min/max oil pressure >= 88% N2 for the EP/LR models are 50/110 psi.

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20
Q

For all engine models; What is the minimum and maximum oil pressure

A

34/110 psi.

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21
Q

What is the min/max oil pressure >= 88% N2 for the XR model?

A

The min/max oil pressure >= 88% N2 for the XR model is 48/110 psi.

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22
Q

What happen if the oil pressure reads 38psi during takeoff?

Is this normal?

A

Although this isn’t a normal reading, it is permissible for EP/LR aircraft models to operate between 34 and 50psi during takeoff and go around phases of flight. XR aircraft permissible range is between 34 and 48psi.

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24
Q

Can engine oil pressure be exceed?

A

Yes; there are certain times and occasions that the engine oil pressure of 110psi maybe exceed.
Engine start with the oil temperature below 21*C or oil pressure exceedance during any phase of flight is time limited.

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25
Q

What is the minimum battery temperature for APU start?

A

-20*C.

26
Q

What are the APU starter limits?

A

The first and second attempt; one minute off between attempts. Third attempt 30 minutes off.

27
Q

At what percentage of the rotor speed would the APU automatically shutdown?

A

104% rotor speed.

27
Q

What is the minimum oil temperature for engine start?

A

-40*C

28
Q

How long can the APU EGT operate in the Amber range?

A

The APU EGT may exceed 680C up to 717C, the amber range for a maximum of 5 minutes.

30
Q

What is the maximum ITT for engine start?

A

800*C.

31
Q

What are the engine start cycles?

A

From the first through the forth attempt, one minute on and one minute off. For the fifth attempt one minute on, five minutes off.

31
Q

What is the definition of a cold engine?

A

90 minutes OFF to be considered cold.

32
Q

How long must the engine run to warm up before take off?

Cold engine, warm engine

A

The engine must warm up 4 minutes for cold engines or 2 minutes for warm engines.

34
Q

What limitations are imposed on the EMB145 windshield wipers?

A

The windshield wipers should not be operated above 170 knots or on dry windshield surfaces.

35
Q

After takeoff, how soon can the autopilot be engaged?

A

500’ AGL.

35
Q

When descending into an airport, what is the highest altitude the flaps can be extended?

A

FL 200.

36
Q

During a visual approach, what is the minimum autopilot disengagement hight?

A

200’ AGL.

37
Q

What is the minimum autopilot disengagement hight for a CAT I ILS approach?

A

200’ AGL.

38
Q

While on a CAT II ILS, what is the minimum autopilot disengagement hight?

A

85’ AGL.

39
Q

What is the minimum autopilot disengagement hight for a non-precision approach?

A

BEFORE LEAVING MDA.

40
Q

When landing below what temperature would a MX inspection is required?

A

-40*C

41
Q

Assuming the engine was cold but it has run for more than 4 minutes, can the Flight Crew takeoff if the engine oil temperature is 38*C?

A

No; to increase N2 above 83%, the engine oil temperature must be at a minimum of 40*C. In lieu of this limitation it is permissible to either run the engine for at least 8 minutes or complete a static run-up to 88% N2, allow the engine to stabilize and check that the oil pressure is equal to or less than 83 psi.

42
Q

What is the acceptable oil pressure while taxing?

A

During taxi the N2 is <88% and the oil pressure should be on the green range (34 to 110 psi all engines).

43
Q

What are the landing gear operating speeds for retraction and extension on the EMB145? and; What is the landing gear extended speed limitation for the EMB145?

A

Vlo retraction/extension = 200/250 knots.

Vle = 250 knots.

44
Q

Assuming the engine oil temperature is -15*C; Can the engines be started?

A

Yes, the minimum engine oil temperature for starting is -40*C. Keep in mind that the engine oil pressure maybe exceeded. If so; engine must remain at IDLE until engine oil pressure is less than 110 psi.

45
Q

What is the maximum tail wind component for the EMB145?

A

10 knots.

46
Q

On the takeoff role the engine oil pressure increases to 112 psi. Is this acceptable? Would an increase to 118 psi should be allowed?

A

Ops between 111 and 115 psi engine oil pressure (EOP) is permitted during all phases of flight but is time limited to 5 minutes. Operations between 116 and 155 psi is also permitted in all phases of flight but time limited to 2 minutes. However; Total time above 110 psi EOP may not exceed 5 minutes.

47
Q

During takeoff, the engine oil pressure drops to 42 psi. Should the takeoff be aborted?

A

No, while this is an abnormal condition, operation between 34 and 48 psi for A1E engines or 34 to 50 psi for A1P engines is permitted during takeoff and go around phases of flight.

48
Q

What is the maximum N1 value for the EMB145?

A

100% N1

49
Q

How long can the EMB145 remain in takeoff thrust setting?

A

5 minutes.

50
Q

How long can the engine vibration be sustained on the amber range?

A

The engine vibration may be exceeded up to but not included to 2.5 IPS for 5 minutes during takeoff or go-around phases of flight. Else is 10 seconds.

51
Q

If holding in icing conditions, what is the configuration that should be used for the EMB145?

A

Landing gear up, flaps 0* and the minimum airspeed 200 knots.

52
Q

Although the EMB145 is heavily automated with regards to cabin pressurization, what are the values for maximum differential pressure, over-pressure and negative pressure on the EMB145?

A

The maximum cabin differential pressure on the EMB145 is 7.8 psi, max cabin over-pressure is 8.1 psi and the max cabin negative pressure is -0.3 psi.

53
Q

Normally the EMB145 handles the anti-ice system automatically but if the need for manual anti-ice manipulation is needed, what would be the min and max temperature limits?

A

The minimum temperature for manual anti-ice is -40C and the maximum is 10C.

54
Q

What is the maneuvering speed on the EMB145?

A

Va = 200 knots.

55
Q

If an electrical abnormality causes the EMB145 to rely solely on the batteries for electrical power, how long the ISIS would remain powered?

A

When operating on batteries only, the maximum ISIS duration is 40 minutes. This time frame may be extended to 45 minutes is the pitot 3 heating sensor is turned off when not in icing conditions.

56
Q

What is the minimum auto pilot engagement height?

A

500’ AGL

57
Q

What is the max APU generator load above FL300?

A

300 Amps

58
Q

What is the max operational altitude for the APU?

A

FL370

59
Q

What is the max altitude for APU start?

A

FL300

60
Q

What is the dry motoring continuous operation?

A

5 minutes ON, 5 minutes OFF.

EMB145 (21 decks)

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