Dispatch Flashcards
When do you need a take off alternate?
When wx minima (visibility only) is below landing minima for that airport.
T/O Alternate requirements?
One hour from departure airport at cruise speed with one engine inoperative. In the ERJ that equates to about 300NM.
When do we need a destination alternate? (7)
1/2/3 rule (1 hour, 2000’, 3 sm), AK airports with only 1 suitable runway, no instrument approach available, FZ precipitation in forecast, RCC of <3, thunderstorms (TS) or thunderstorm with rain shower (TSRA) is forecast for the destination at the ETA regardless of intensity, when crosswind limitations are expected to be exceeded at ETA
What are the minimums for listing an airport as an alternate? (2)
Single approach method: +400’, +1sm; Double approach method: +200’, +1/2sm (2 different straight in approaches, 2 different suitable runways, 2 diff navigation facilities, minima added to the higher of the two approaches)
When do we need to list a 2nd alternate? (2)
Marginal wx or exemption 17347
What is marginal weather?
When both the destination and alternate are marginal. Wx is equal to wx required for the approach. Destination is at minimums (visibility) and alternate is at minimums (visibility and ceiling)
What is Exemption 17347?
When main body weather is at or above minimums, “TEMPO”/“PROB” is not lower than 1/2 minimums. Can use for destination or 1st alternate, but not both.
What must the release include? (7)
Aircraft ID, trip number or flight number, type of operation (VFR/IFR), minimum fuel supply, departure/destination/alternate/intermediate airports, latest weather reports/forecast, all active MEL and CDL items
When is a new release required? (10)
Flight departs after a delay of greater than two hours, flight cannot depart in accordance with the release, the PIC/dispatcher requests a change, aircraft change, a flight returns to the airport from which it departed, crewmember change, a MEL/CDL deferral, PIC requests an increase in dispatch/flight release fuel, there’s a change in route/altitude that increases MINTO, weather at any listed alternate is forecast to be below authorized minima
What is Driftdown Method 1?
From V1 to destination; the aircraft will be able to maintain 1000’ above all terrain within 5 miles of the route.
What is Driftdown Method 2?
From cruise altitude; ensures 2000’ terrain clearance within 5nm of course when diverting from a point abeam the Drift Down Alternate.
What is MWL on release?
Maximum Wind Level. Also height of the tropopause.
What is WC on the release?
Indicates the tailwind or headwind component.
What type of Deferrals must ALWAYS be listed on the release?
MEL’s and CDL’s. NEF’s do NOT require an amended release.
Where do you find the minimum EFB battery required for a flight? Does this always apply?
On the release…. MIN EFB BAT REQ. This only applies if your backup battery becomes unavailable.
