How can we identify supercooled large droplets (SLD)? What must be done if encountered?

By ice accretion on the flight deck side windows? wing and cowl anti-icing systems must be ON and you must leave SLD.

LIMITX Flashcards by Eli Ortiz

*RVSM REQUIRED EQUIP?

1) Autopilot (1)
2) Altitude Alerting System
3) Transponder -alt reporting- (2), (1) must be operational
ADC (2), (2) must be operational

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**CRJ 700 Minimum Flight Weight?

42,000 lbs

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**CRJ 700 Minimum Operating Empty Weight?

39,835 lbs

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CRJ550 Minimum Flight weight?

42,000 lbs

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*Maximum airport pressure Altitude for takeoff and landing?

8,000’

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*Maximum operating altitude?

41,000’

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**•Maximum ambient temperature for takeoff and landing?

•The minimum ambient temperature approved for takeoff is?

ISA + 35C

* -40C/-40F

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Is continued operation in areas of supercooled large droplet (SLD) allowed?

No, it’s prohibited.

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How can we identify supercooled large droplets (SLD)?

* What must be done if encountered?

By ice accretion on the flight deck side windows?

* wing and cowl anti-icing systems must be ON and you must leave SLD.

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May you takeoff with frost, ice, snow or slush adhering to any critical areas?
What are the critical areas?

* wings, upper fuselage, horizontal stabilizer, vertical stabilizer, control surfaces, engine inlets.

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** May you takeoff with frost adhering to the upper surface of the fuselage?

Yes, if it’s possible to distinguish surface features.

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** May you takeoff with a layer of frost adhering to the underside of the wing?

Yes, if it’s a max of 1/8” and caused by a cold soaked airplane

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** Maximum runway slopes approved for takeoff and landing?

+2%

-2%

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Max tailwind component for takeoff and landing?

10 kts

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** What distance (time) from a suitable airport must the flight be within, if cargo is carried in any labeled cargo compartment?

60 minutes

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**Engine type?

2 General Electric (GE) CF34-8C5B1

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**N1 % rpm (Red)?

99.5

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**N2 % rpm (Red)?

99.4%

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**Powerplant Intermix operations allowed?

No, powerplant intermix operations are prohibited.

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**ENGINE WARM-UP: How long must the engine remain at idle after start and what is the limit on N1?

The engine must remain at IDLE until oil pressure reaches normal range. During ALL starts, do not exceed 75% N1 for 2 minutes after start, or until all operating indications are in the normal range, whichever is longer.

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**Oil temp red line engine (C)?

164C

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Is use of the ENGINES HIGH PWR SCHEDULE switchlight allowed?

No, it’s prohibited.

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N1 ITT limit before attempting to ground start engine?

N1 ITT must be below 120C

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ENGINE: What should oil pressure value indicate during ground start? May it peak beyond max display value and what is this value? How long may oil pressure be greater than 95 PSI?

positive value
Yes (182psi amber dashes)
10 minutes

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** When do special procedures apply for a cold-soaked airplane? **What procedures must be accomplished?

* Before the first flight of the day when the airplane is cold-soaked at an ambient temperature of -30C or below for more than 8 Hours. * 1) the engines must be motored for 60 seconds and the FAN ROTATION must be VERIFIED before an engine start is initiated. 2) Thrust reversers must be actuated until the deploy and stow cycle are 2 seconds or less.

When must continuous engine ignition be used?

* Takoff and Landing on contaminated runways * flight through moderate or heavier intensity rain * flight through moderate or heavier intensity turbul. * flight in the vicinity of thunderstorms

Flex not authorized when?

* Wing and/or cowl anti-ice bleeds are in use * Runway contaminated with standing water, slush, snow, or ice (may be used on wet runway if crew selects "WET" on perf data FMS. * Warnings or forecast of windshear or downdraft exist (including LLWAS advisory) * Antiskid system Inop. * The engine cannot achieve full rated thrust

**ENGINE: At what N2% rpm must the starter not be used?

Starter must not be used if N2 rpm exceeds 45%

** At initiation of thrust lever movement from SHUT OFF to IDLE what are ITT limits (ground start and air start)?

* Ground ITT must be 120C or less for all starts | * Airstart ITT must be 90C or less for all starts

Engine Start (ground) starter limits?

* 1&2 max time on: 90 secs. Cool period: 10 secs. | * 3-5 max time on: 90 secs. Cool period: 5 minutes

Engine Start and Motoring (flight)?

* 1 max time on: 120 secs. Cool period: 10 secs | * 2-5 max time on: 60 secs. Cool period: 5 minutes

Motoring limits (ground)?

* 1 max time on: 90 secs. Cool period: 5 minutes. | * 2-5 max time on 30 secs. Cool period: 5 minutes

**Engine Relight Limitations (windmilling)?

Altitude from 25,000' to Sea Level: Speed 250 KIAS to Vmo and 7.2 N2 minimum.

**Engine Relight Limitations (Starter Assisted)?

* Altitude: 21,000' to Sea Level: Speed from Vref up to Vmo and from 0 to 45% N2. * Allow engine to spool down to less than 20% N2, or stabilized windmill speed, prior to initiating a starter assisted start (fuel in at 20% N2 min).

**Engine Relight Limitations (All-Engine-Out Rapid Relight)?

Altitude from 10,000' to Sea Level: FADEC rapid relight capability has been demonstrated at 200 KIAS for up to 15-second fuel interruptions. Rapid relight envelope speed 200 to 250 KIAS.

Max fuel imbalance between left and right wing tank?

* During takeoff: 300 lbs | * All other phases of flight: 800 lbs

What is the limitation during takeoff in regards with fuel qty relation between the center tank and wing tanks?

Takeoff with fuel in excess of 500 lbs in the center tank in not permitted unless: each wing tank is above 4,400 lbs, or if each wing tank is below 4,400 lbs consult the AFM limitations section for additional requirements.

** What is the minimum fuel quantity for a go-around (assuming what initial pitch attitude and max thereafter(?

The minimum fuel for a go-around is 600 lbs per wing tank (with the airplane level) and assuming a airplane climb of 10 degrees nose up.

What is the max difference in fuel qty between wing tanks for ground ops?

The right and left fuel tanks should never have a difference greater than 2,500 lbs.

**Minimum ambient temperature for starting a cold-soaked APU on the ground is?

-40C

**Maximum EGT ( APU starting)?

Dependant on altitude and temperature (0 to 100% RPM 692C to 1038C

APU starter motor duty cycles limited to how many starts/start attempts in one hour? Any limitation between cranking attempts?

* 3 starts/start attempts in one hour | * 2 minute delay between cranking attempts to allow for cooling of starter, starter contacted and APU fuel drainage

**APU EGT red line? MAX RPM% (red)?

* Max EGT: 807 (red line) | * Max RPM %: 107 (red)

**APU gen max load?

40 kVA

Max altitude for APU ground start?

15,000' pressure altitude

APU Altitude bleed limit?

25,000' pressure altitude

APU altitude starting limit?

37,000' pressure altitude

APU generator altitude loading limit (operating limit)?

41,000' pressure altitude

CRJ max cruise Mach in RVSM airspace?

0.83 Mach

Flap positions?

1, 8, 20 30, 45

Flaps 1 (VFE)?

230 KIAS

Flaps 8 (VFE)?

230 KIAS

Flaps 20 (VFE)?

230 KIAS

Flaps 30 (VFE)?

185 KIAS

Flaps 45 (VFE)?

170 KIAS

Gear extension (VLO)?

220 KIAS

Gear Downd and Locked (VLE)?

220 KIAS

Gear retraction (VLO)?

200 KIAS

**CRJ maximum tire limit speed?

182 knots ground speed

**Max speed for ADG operation?

VMO/MMO

Airspeed limitation for severe turbulence penetration?

280 KIAS or 0.75 Mach, whichever is lower

**Windshield wiper max speed operation?

250 KIAS

**Flaps maneuvering limit load factor (retracted/extended)?

* Retracted: -1.0 to 2.5 G | * Extended: 0.0 to 2.0 G

**PRESSURIZATION: Max relief differential pressure is?

8.7 psi

**PRESSURIZATION: | Max negative differential pressure is?

–0.5 psi

**During taxi, takeoff and landing, the pressure differential must not exceed?

0.1 psi

**To preclude possible crew and/or passenger ear damage, use of the EMERG DEPRESS switch above what altitude is prohibited?

15,000'

**Max altitude for single pack operation is?

31,000'

**DC ELECTRICAL SYSTEM LOAD Max permissible continuous load on each TRU is?

120 amps

To protect the CRT displays, the max permissible time for ground ops with DC power is?

5 minutes

Enroute Slats/Flaps is prohibited?

At altitudes above 15,000'

Flight spoilers must not be extended in-flight at an altitude of?

300' AGL

To ensure adequate maneuver margins, flight spoilers must not be extended in-flight at airspeeds below the recommended approach speed plus?

10 KIAS

**During landing what are the limitations on thrust reversers?

* Max reverse thrust prohibited below 75 KIAS | * Reverse idle should be achieved by 60 KIAS

Taxi lights must be switched OFF whenever the airplane is stationary in excess of?

10 minutes

AP minimum engagement height?

600' AGL

Non-Precision Approach AP minimum use height?

400' AGL

LIMITX Flashcards

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