Q400 Limitations Oil, APU, Powerplant

Question 1

Oil Pressures General
– Oil Pressure minimum
– Normal operating range
– Transient minimum

Answer 1

44 psi
61 to 72 psi
44 to 61 psi

Question 2

Temperature for Start
– Minimum oil temperature for start up
– Minimum oil temperature above FLT IDLE

Answer 2

-40°C

0°C

Question 3

Temperature at Ground Idle
– Minimum Oil Temperature
– Maximum Oil Temperature
– Maximum Oil Temp PLA between Disc and FLT IDLE

Answer 3

-40°C
107°C
125°C

Question 4

Temperature Above Ground Idle
– Minimum Oil Temperature
– Maximum Oil Temperature
– Max. Continuous Oil Temperature

Answer 4

0°C (55° C for take-off in icing conditions)
107°C
107°C

Question 5

Temperature for Icing:
Minimum oil temperature required to ensure engine air inlet ice protection, prior to
take-off, is

Answer 5

55°C

Question 6

Minimum oil temperature required to ensure engine air inlet ice protection, in flight
and within 3 minutes of setting take-off power, is

Answer 6

65°C
NOTE: To maintain the minimum oil temperature of 65°C during descent,
holding and approach, in icing conditions, it may be necessary to increase
power. The increase in engine power will be limited by the allowable
maximum airspeed appropriate to VMO, VLO, VFE, aircraft system
malfunctions, turbulence and ATC instructions.

Question 7

APU Limitations

Answer 7

1. APU is approved for GROUND OPERATIONS ONLY.
2. APU must be shutdown prior to take-off.
3. APU must not be operated unattended with passengers onboard.
4. APU must not be operated unattended during pressure refuelling.
5. APU must not be operated during gravity refuelling.
6. APU ambient temperature (lower) -35°C APU ambient temperature (upper) +50°C or ISA +35°C, whichever is lower.
   NOTE: With APU inlet louvres installed, APU operation is limited to +21°C maximum ambient temperature.

Question 8

APU Starter Cranking Limits
NOTE: If the APU does not start in the third attempt, maintenance action is
required.

Answer 8

START MAX TIME ON… FOLLOWED BY…

1. 60 secs 2 mins off
2. 60 secs 2 mins off
3. 60 secs 30 mins off

Question 9

Propeller
– Manufacturer
– Model

Answer 9

Dowty Aerospace

R408

Question 10

Powerplant
– Manufacturer:
– Model:
– Ambient temperature limitations:

Answer 10

Pratt & Whitney
PW 150A
-54°C to +50°C or ISA + 35°C
Whichever is lower

Question 11

– With Bypass Doors Open, take-off, landing and setting MTOP and MCP are limited to (temp)

Answer 11

ISA + 25°C

Question 12

– Maximum Altitude for Airstart

Answer 12

20,000 ft

Question 13

– Automatic Take-Off Power Uptrim

Answer 13

10% torque (nominal)

Question 14

Power Plant Limitations

Max. Take-off (MTOP) % The maximum take-off rating is limited to 5 minutes.

Answer 14

106%

Question 15

Power Plant Limitations
Max. Take-off (MTOP)
Max ITT

Answer 15

880°C

Question 16

Power Plant Limitations
Max. Take-off (MTOP)
Max NL% RPM

Answer 16

100%

Question 17

Power Plant Limitations
Max. Take-off (MTOP)
Max NH% RPM

Answer 17

100%

Question 18

Power Plant Limitations
Max. Take-off (MTOP)
Max NP RPM

Answer 18

1020

Maximum allowable continuous NP overspeed is 1071 rpm.

Question 19

Power Plant Limitations
Max. Take-off (MTOP)
Oil Pressure PSID

Answer 19

61 - 72

Question 20

Power Plant Limitations
Max. Take-off (MTOP)
Oil Temp °C

Answer 20

0 - 107

Question 21

Power Plant Limitations
Normal Take-off (NTOP)
Max Torque

Answer 21

90.3%

NTOP torque indication will be 90% or 91%.

Question 22

Power Plant Limitations
Normal Take-off (NTOP)
Max ITT

Answer 22

The Normal Take-off ITT limit for a given ambient air temperature is given
in “Variation of ITT with Ambient Air Temperature for NTOP” below.

Question 23

Power Plant Limitations
Normal Take-off (NTOP)
Max NL% RPM

Answer 23

The Normal Take-off NH and NL limit for a given ambient air temperature
is given in “Variation of NH and NL with Ambient Air Temperature for NTOP.

Question 24

Power Plant Limitations
Normal Take-off (NTOP)
Max NH% RPM

Answer 24

The Normal Take-off NH and NL limit for a given ambient air temperature
is given in “Variation of NH and NL with Ambient Air Temperature for NTOP.

Question 25

Power Plant Limitations Normal Take-off (NTOP) Max NP RPM

Answer 25

1020 | Maximum allowable continuous NP overspeed is 1071 rpm.

Question 26

Power Plant Limitations Normal Take-off (NTOP) Oil Pressure PSID

Answer 26

61 - 72

Question 27

Power Plant Limitations Normal Take-off (NTOP) Oil Temp °C

Answer 27

0 - 107

Question 28

Power Plant Limitations Max Continuous (MCP) Max Torque %

Answer 28

100%

Question 29

Power Plant Limitations Max Continuous (MCP) Max ITT

Answer 29

880°C

Question 30

Power Plant Limitations Max Continuous (MCP) Max NL% RPM

Answer 30

100%

Question 31

Power Plant Limitations Max Continuous (MCP) Max NH% RPM

Answer 31

100%

Question 32

Power Plant Limitations Max Continuous (MCP) Max NP RPM

Answer 32

1020 | Maximum allowable continuous NP overspeed is 1071 rpm.

Question 33

Power Plant Limitations Max Continuous (MCP) Oil Pressure PSID

Answer 33

61 - 72

Question 34

Power Plant Limitations Max Continuous (MCP) Oil Temp °C

Answer 34

0 - 107

Question 35

Power Plant Limitations Starting Max. ITT °C and time

Answer 35

920 | 20 seconds maximum.

Question 36

Power Plant Limitations Starting Oil Pressure PSID max, at discing with OAT below _•

Answer 36

100 max. | 165 Maximum oil pressure at discing with OAT below 0°C.

Question 37

Power Plant Limitations Starting Oil Temp °C

Answer 37

- 40° minimum

Question 38

Power Plant Limitations Transient (20 seconds maximum.) Max Torque

Answer 38

135%

Question 39

Power Plant Limitations Transient (20 seconds maximum.) Max ITT

Answer 39

920°C

Question 40

Power Plant Limitations Transient (20 seconds maximum.) Max NL% RPM

Answer 40

102.3%

Question 41

Power Plant Limitations Transient (20 seconds maximum.) Max NH% RPM

Answer 41

101.2%

Question 42

Power Plant Limitations Transient (20 seconds maximum.) Max NP RPM

Answer 42

1173

Question 43

Power Plant Limitations Transient (20 seconds maximum.) Oil Pressure PSID (lower/upper)

Answer 43

44 - 61 | 72 - 100

Question 44

Power Plant Limitations Transient Oil Temp °C and max time for torque values above_and less than_

Answer 44

125° Max. 5 seconds maximum for torque values above flight idle and less than 55%.

Question 45

Power Plant Limitations Max. Reverse Max Torque

Answer 45

35%

Question 46

Power Plant Limitations Max. Reverse Max ITT

Answer 46

880°C

Question 47

Power Plant Limitations Max. Reverse Max NL% RPM

Answer 47

100%

Question 48

Power Plant Limitations Max. Reverse Max NH% RPM

Answer 48

100%

Question 49

Power Plant Limitations Max. Reverse Max NP RPM

Answer 49

1020

Question 50

Power Plant Limitations Max. Reverse Oil Pressure PSID

Answer 50

61 - 72

Question 51

Power Plant Limitations Max. Reverse Oil Temp °C

Answer 51

0 - 107

Question 52

Starter Cranking Limits

Answer 52

START MAX TIME ON FOLLOWED BY 1 70 seconds 2 minutes off 2 70 seconds 2 minutes off 3 70 seconds 30 minutes off

Question 53

Engine and Propeller Ground Operating Limitations – Maximum torque is – Minimum NH is – Maximum wind speed for ground operation, with the nose of the airplane more than _* out of the wind is

Answer 53

100% 64.2% 30°, 50 kts

Question 54

Engine Airborne Operation Limitations – In-flight operation of the POWER levers aft of the FLIGHT IDLE gate is – Minimum SAT for engine relight is.

Answer 54

prohibited. | -40°C

Question 55

Engine and Propeller Ground Operating Limitations For wind speed greater than 8 kts, with the nose of the airplane more than 30° out of wind, the maximum power for ground maneuvering is as follows: ground maneuvering NOTE: Ground operations in winds greater than 50 kts must be recorded and the maximum wind speed provided to maintenance within 24 hours (flying day)

Answer 55

WIND SPEED MAXIMUM POWER SETTING (GROUND MANEUVERING) 9 to 20 kts FLIGHT IDLE (Power levers may be momentarily increased above flight idle for acceleration) 21 to 35 kts FLIGHT IDLE 36 to 50 kts FLIGHT IDLE (Power levers must be at DISC with airplane static)

Question 56

Engine and Propeller Ground Operating Limitations For wind speed greater than 8 kts, with the nose of the airplane more than 30° out of wind, the maximum power for ground maneuvering is as follows: static NOTE: Ground operations in winds greater than 50 kts must be recorded and the maximum wind speed provided to maintenance within 24 hours (flying day)

Answer 56

WIND SPEED MAXIMUM POWER SETTING (GROUND STATIC OPERATION) 9 to 20 kts. Pwr levers angle at 60° (approximately midway between FLIGHT IDLE and Take-off power detent) 21 to 35 kts FLIGHT IDLE 36 to 50 kts(gusts to 55kts) DISC