OPOS Spects Flashcards
LAHSO WX Requirements
Weather minimums can be no lower than 1,000 ft and 3 miles (PAPI or VASI available and working), otherwise 1,500 ft and 5 miles are required.
No windshear reported in the last 20 minutes prior to LAHSO clearance being issued.
The tail wind on the LAHSO runway cannot be greater than 3 kt.
Winter OPS
How much frost is allowed under wing?
1/8 inch
Winter OPS
When must cold wx preflight be preformed?
OAT 5° C or less
Wing fuel temp 0°C or less
Atmospheric conditions conducive to icing
A/c parked overnight and may have been exposed to frost/ precip. Etc..
Any through flight where residual ice may be present
Cold soak ice suspected in fuel tank areas
Winter OPS
What should you do if taxing in icing conditions for > 30 mins or fan vibration is detected?
Run each engine up individually to 54% n1 for 30 secon
Winter OPS
When taking off in icing conditions…
Takeoff power must be set to 54% n1 for 30 seconds or until fan vibration is normal
Winter OPS
What do you do if you suspect Ice accretion on fan blades in flight?
Reduce one thrust lever at a time towards idle then advance to min of 70% n1 for 10-30 seconds
Winter OPS
What auto brake setting for contaminated runways?
Med
What must be included on release? (6)
Aircraft ID
Trip or flight #
Dept airport, intermediate stops, destination and alternates
IFR/VFR
minimum fuel
Wx reports, forecast for each airport
Winter OPS
System includes protection for…
Wings Cowls Windshield ADSP /TAT probes Wiper system
ICE AND RAIN
How does the engine bleed valve fail?
Open
ICE AND RAIN
How many ice detectors?
2
ICE AND RAIN
In flight Ice detectors automatically turn on wings and cowl until —- minutes after icing condition is no longer detected.
5 minutes
ICE AND RAIN
How do you configure wing cowls on ground?
Through MCDU
ICE AND RAIN
How long does MCDU setting ice conditions inhibit the ice detector logic after takeoff?
1700’agl or 2 minutes whichever occurs first
ICE AND RAIN
How long does MCDU setting ice conditions inhibit the ice detector logic after takeoff?
1700’agl or 2 minutes whichever occurs first
ICE AND RAIN
When will cowls turn on?
After engine start if in auto and set to eng or all in MCDU
ICE AND RAIN
When will wings turn on ground?
Set to auto with MCDU set to all with wheel speed greater than 40 kts
ICE AND RAIN
When are the ADSP heated?
With engine running or airborne
Also if you push the heater button which overused the logic on ground
ICE AND RAIN
Describe the wing anti ice test.
10 minutes after takeoff or 10000’
Wing valves open for 60 seconds or if all slats increase 10°c whichever occurs first
ICE AND RAIN
Will windshield heat work on ground?
Yes but only with 2 AC sources
Except they both run for 120 seconds during Elec PBIT test
ICE AND RAIN
Will windshield heat work in flight with only one AC source?
Yes the captains only, if it fails the FO side will work
