Skywest E175 Limitations

Minimum Battery Voltage

22.5 Volts

Engine Start Temperature Limits

Minimum : None , Maximum : 815C

Engine Start Oil Temperature Limits

Minimum : None , Maximum : None

Engine Start Oil Pressure Limits

Minimum: 25 PSI , Maximum : None

Starter Crank Limits (#1 and #2 Starts on GROUND)

90 Seconds On, 10 Seconds Off

Starter Crank Limits (#3-#5 Starts on GROUND)

90 Seconds On, 5 Minutes Off

Starter Crank Limits (#1 and #2 Starts in FLIGHT)

120 Seconds On, 10 Seconds Off

Starter Crank Limits (#3-#5 Starts in FLIGHT)

120 Seconds On, 5 Minutes Off

Dry Motoring Limit #1

90 Seconds On, 5 Minutes Off

Dry Motoring Limit #2-#5

30 Seconds On, 5 Minutes Off

After 5 sequential motoring cycles, how long must you wait for cool down period?

15 Minutes

When must positive N1 be indicated when conducting an engine ground start?

When it is necessary to perform an engine start with tailwind, monitor N1 indication. When there is no positive increase of N1 indication before starter cutout (50% N2), the engine start must be manually aborted.

Is Takeoff with the Automatic Takeoff Thrust Control System (ATTCS) OFF is authorized?

No, it is not authorized.

Maximum Fuel Capacity?

20,935 lb

Authorized Fuel Types

JET A and JET A1

Maximum Fuel Imbalance

794 lb

Minimum Fuel Tank Temperature

-37 C

Is it permissible to takeoff and land with a FUEL IMBALANCE message?

Yes, this is allowed as long as the actual imbalance does not exceed 794lb.

Fuel Crossfeed During Takeoff and Landing

Fuel crossfeed must be selected OFF during takeoff and landing.

How much long after the EICAS is energized should you wait to start the APU?

Wait 30 seconds after the EICAS is energized to start the APU.

How long may you leave the aircraft unattended with the APU running?

Do not leave the aircraft unattended more than five minutes with the APU running (SW).

Is simultaneous use of APU bleed and HP (Huffer) cart allowed?

Simultaneous use of the APU bleed and the HP cart is prohibited.

APU Starter Duty Cycle

Attempts #1 and #2 : 60 Seconds Off, Attempt #3 : 5 Minutes Off

APU Start Temperature Limits

Minimum: -54C, Maximum: ISA +35C

APU Maximum Starting Altitude

30,000ft

APU Continuous Operation Temperature Limits

Minimum: -54C, Maximum: ISA +35C (52C)

APU Maximum Operating Altitude

33,000ft

APU Maximum Altitude for use of Electrical Generator

33,000ft

APU Maximum Altitude for use of Bleed

15,000ft

APU Maximum Altitude for Engine Start

21,000ft

Maximum Differential Pressure

Up to 37,000ft : 7.8PSI, Above 37,000ft : 8.4PSI

Max Differential Over Pressure

8.8PSI

Max Differential Negative Pressure

-0.5PSI

Max Differential Pressure T/O and Land

0.2PSI

Minimum Hydraulic Reservoir Temperature for Engine Start

-18C

Brake Temperature for Takeoff

Brake Temperature indications must be in green for takeoff.

Go Around after Use or Thrust Reversers

Do not attempt a go-around maneuver after deployment of the thrust reversers.

When using Reverse Thrust, when may you move thrust levers back into forward thrust range?

After selecting reverse thrust, do not move the thrust levers into the forward thrust range until the REV icon on the EICAS is shown in amber or green.

Thrust reverse use during power back and taxi operations?

The use of thrust reversers during normal taxi operations is prohibited.

Does Anti Icing Automatic operation have a temperature limitation?

There is no temperature limitation for anti-icing system automatic operation.

Use of FMS Speed Mode during Engine Failure

The use of FMS Speed Mode is prohibited in the event of an engine failure (Non NG FMS only).

TAWS for Navigation

Navigation is not to be predicated on the use of the Terrain Awareness System.

When should EGPWS be manually inhibited?

The use of predictive EGPWS functions should be manually inhibited when landing at an airport
that is not in the database to avoid unwanted alerts.
The use of predictive EGPWS functions must be manually inhibited during QFE operations,
when GPS data is un

When is TAS, TAT, and SAT information valid?

TAS, TAT, and SAT information are only valid above 60 kt.

When is the standby magnetic compass indication not valid?

While transmitting in VHF1, the standby magnetic compass indication is not valid.

What type of minimums must be used for CAT I approaches? (Baro ALT or RA)

Barometric altimeter minimums must be used for all CAT I approaches.

Minimum autopilot engagement height.

400 ft

Minimum autopilot use height.

50 ft

Minimums autopilot use height when on a non precision height?

MDA

When on the ground the TO DATASET MENU on the MCDU must be set to ENG in the following cases when OAT is between 5�C and 10�C and:

When there is any possibility of encountering visible moisture up to 1,700 ft AFE.
When operating on ramps, taxiways, or runways where surface snow, ice, standing
water, or slush may be ingested by the engines, or freeze on engines, nacelles, or
engine se

When on the ground the TO DATASET MENU on the MCDU must be set to ALL in the following cases when OAT is below 5�C and:

When there is any possibility of encountering visible moisture up to 1,700 ft AFE.
When operating on ramps, taxiways, or runways where surface snow, ice, standing water, or slush may be ingested by the engines, or freeze on engines, nacelles, or engine se

Use of Anti Icing System in Flight

The engine and wing anti-ice systems operate automatically, in case of ice encounter when
the ice protection mode selector is in the AUTO position.
When either one or both ice detectors are failed, the crew must set the mode selector to ON when icing cond

When may icing conditions exists?

Icing conditions may exist whenever the Outside Air Temperature (OAT) on the ground or
for takeoff, or Total Air Temperature (TAT) in flight, is 10�C or below and visible moisture
in any form is present (such as clouds, fog with visibility of one mile or

Maximum Ramp Weight (LR)

85,870 lb

Maximum Takeoff Weight (LR)

85,517 lb

Maximum Landing Weight (LR)

74,957 lb

Maximum Zero Fuel Weight (LR)

69,886 lb

Minimum Runway Width

100ft (SW)

Wind Span

93 ft 11 in

Aircraft Length

103 ft 11 in

Tail Height

32 ft 4 in

Maximum Operating Altitude

41,000ft

Maximum T/O and Landing

10,000ft

Maximum Temperature Takeoff / Landing

ISA + 35�C (52C)

Minimum Temperature Takeoff and Landing

-40�C

Maximum Runway Slope

+/- 2 Degrees

Maximum Tailwind Component

15 KTS

Maximum Altitude for Single PACK Operations

31,000ft

VMO

SL-8,000ft : 300KIAS , 10,000-Mach Transition : 320KIAS

MMO

0.82 Mach

VA

240 KIAS

VLO/LE (Extend, Retract, Operation)

250 KIAS

V Tire

195 KIAS

VRAT Deploy Max

VMO/MMO

VMIN (Minimum for RAT to apply power)

130 KIAS

VB

Below 10,000 : 250KIAS, 10,000 and Above: 270KIAS/M.76 (Whatever is Lower)

V Wipers Ops Max

250 KIAS (SW)

V Window

160 KIAS

VFE1

230KIAS

VFE2

215KIAS

VFE3

200KAIS

VFE4

180KIAS

VFE5

180KIAS

Full

165KIAS

Dry X-Wind Takeoff

38KTS (Gusts not factored into this value)

Wet X-Wind Takeoff

31KTS (Gusts not factored into this value)

Compact Snow X-Wind Takeoff

20KTS (Gusts not factored into this value)

Dry Snow / Wet Snow / Slush / Standing Water X-Wind Takeoff

18KTS (Gusts not factored into this value)

Ice & Wet Ice X-Wind Takeoff

12 KTS (Gusts not factored into this value)

Static Takeoff Crosswind Limitation

Due to engine compressor stall possibility, static takeoff is not recommended with
crosswind component greater than 30 kt.

Maximum Altitude Flaps / Slats

20,000ft

Enroute Operations

Prohibited

Minimum Spoiler Speed

180KIAS

CATII Approach Flap Requiremenrs

Mandatory Flaps 5

Landing Flaps Full Go Around Flaps

Go Around Flaps 4

Landing Flaps 5

Go Around Flaps 2

Max Ramp Weight (LL Model)

85,450 lbs

Max T/O Weight (LL Model)

85,098 lbs

Max Landing Weight (LL Model)

74,957 lbs

Max ZFW (LL Model)

69,467 lbs

RCC 6 / BA Dry X-Wind Landing

38 Knots (Gusts not factored into this value)

RCC 5 / BA Good X-Wind Landing

31 Knots (Gusts not factored into this value)

RCC 4 / BA Good to Medium X-Wind Landing

20 Knots (Gusts not factored into this value)

RCC 3 / BA Medium X-Wind Landing

15 Knots (Gusts not factored into this value)

RCC 2 / BA Medium to Poor X-Wind Landing

12 Knots (Gusts not factored into this value)

RCC 1 / BA Poor X-Wind Landing

8 Knots (Gusts not factored into this value)

Does the maximum cumulative starter run time per start attempt include motoring?

Yes, it is motoring plus start time.