Weather Flashcards
CQ QUESTION! When is a runway service considered to be contaminated?
When more than 25% of the length and width of the runway to be used is covered in visual contamination greater than 1/8”.
(FOM CH 7)
CQ QUESTION! What is a runway surface considered to be wet?
When more than 25% of the length and width of the runway to be used is covered in visual dampness 1/8” or less.
(FOM CH 7)
What is a compacted snow runway?
When the runway to be used is covered by snow which is strong enough to prevent aircraft tires from penetrating and breaking up the surface.
Minimum cleared runway width?
80’ (100’ for normal operations)
When is T/O and landing, regarding runway conditions, prohibited? (3)
Crosswind limitations, NIL BA is reported, runway contaminated by wet ice, slush over ice, water over compacted snow or dry snow/wet snow over ice with runway CCs less than 1 or BA NIL.
To what do we apply temp comp on an approach? (3)
Intermediate fixes, MDA/DA/DH, missed
In what weather may we NOT take off or land in? (5)
Severe ice, +FZDZ, FZRA, +FZRA, GR (hail 1/4” and greater in size)
When is a destination alternate required, regarding precipitation? (6)
Regardless of intensity! FZDZ, FZRA, +SN, GR, FZFG, UP (unknown precipitation)
When does HOT begin and end?
Begins when the final application of fluid commences, expires when the fluid loses its effectiveness.
When is a flex T/O not allowed? (3)
Contaminated runway, wind shear, special DP required full thrust
When must the aircraft be inspected for cold soak ice/frost? (2)
When frost is detected below the wing tank area. When aircraft was exposed to low temperatures during inbound leg and aircraft returns to flight with little delay on the ground, when the surface temperature is near freezing with high humidity.
Is T/O permitted with frost adhering to the underside of the wing fuel tank area that is caused by soaked fuel?
Yes, maximum of 1/8”.
For what conditions do HOT not exist? (4)
+SN, ice pellets, mod and heavy frz rain, hail
Describe type I and IV fluid.
Type I: deicing, orange to off-orange. Type IV: anti-icing, green.
What are the standard take off minimums?
5000 RVR/1SM. TDZ is controlling; MID may be subsituted
What are the lower than standard take off minimums?
1600 RVR/ 1/4 SM (TDZ is controlling, MID may be substituted. HIRL/CL/RCLM/adequate visual reference required). Lower than that? Minimum of 2 RVR required. All that are operational are controlling, except for far end). 1200, 1200, 1000: daytime: HIRL/CL/RCLM and night time: HIRL/CL. 1000, 1000, 1000: CL / HIRL&RCLM. 600, 600, 600: HIRL&CL. NOTE: baby captains add 1/2m for T/O alternate.
What is considered the main body of a TAF?
First Line of the TAF. All FM Groups (at the specified time). BCMG (after the END of the period specified).
What is considered conditional language in a TAF?
TEMPO and PROB. Not BCMNG!
Which weather report is controlling on flights less than an hour long?
Prior to the point of dispatch, when a flight is less than 60 minutes (planned taxi out time + enroute time), the flight crew must compare the current METAR to the latest TAF; the lowest weather is considered controlling for dispatch.
What are atmospheric conditions that require a cold weather preflight inspection?
OAT is 5* or less. Wing fuel temperature is 0*C or less. Conditions conducive to icing exist. RON and may have frozen contaminants. Through flight with residual ice from inbound flight. Cold soaked ice suspected in fuel tank.
(ERJ 175 SOPM SP 3700 Ch. 4)
CQ QUESTION! What checklist must be complete prior to starting the deice/anti-ice process?
The Before Start Checklist.
ERJ FLIGHT DECK DEICE/ANTI-ICE CHECKLIST
CQ QUESTION! What is the guidance the checklist provides regarding running the APU during deicing procedures?
Should remain off.
ERJ FLIGHT DECK DEICE/ANTI-ICE CHECKLIST
CQ QUESTION! Are there different deice procedures for engines off vs engines running?
Yes.
CQ QUESTION! Are the Deice/Anti-Ice Communication Elements required? Where are they found?
Yes.
Communication Elements Table, GDPM.
