Dispatch Flashcards
What increase in TOW requires the Captain to contact Dispatch?
- +2,000 pounds
- The M1 ENRTE ATOG (if planned Method 1)
What is the distance requirement for a takeoff alternate?
400 NM
What destination weather would require an alternate?
- Forecast weather one hour before and one hour after ETA, ceiling less than 2,000 feet or visibility less than 3 miles
- The flight is a supplemental operation (e.g. charter, non-scheduled) to an airport not authorized as a Regular, Refueling, Alternate or Provisional
How are alternate minimums determined?
- For airports with one operational CAT I approach: add 400 feet; 1 mile to published minimums
- For airports with two operational CAT I approaches: add 200 feet; 1/2 mile to higher of two minimums, add 400 feet; 1 mile to lower of two, then use the lowest of the above
What is the fuel requirement for dispatch?
Burnout + furthest alternate + RSV (45 minute Reserve) + unusable
What events must be reported to Dispatch?
- If ETA will exceed planned by more than 15 minutes, or plus or minus 5 minutes from last reported
- Cruise altitude varies by 4.000 feet from planned
- Lateral deviation exceeds 100 miles
- Fuel quantity indicator failure
- If all contingency fuel will be burned
- Flight encounters weather significantly different than forecast, or moderate or greater is encountered
What is the fuel requirement for a 10% reserve flag dispatch?
Is an alternate required?
Does destination forecast need to be above minimums?
Burnout + 10% of flight time + furthest alternate + 30 minutes of hold
Yes, if greater than 6 hours flight time
No, but alternate needs to be forecast above minimums
What is the fuel required for a 2 hour rule flag dispatch?
Is an alternate required?
Does destination forecast need to be above minimums?
Burnout + 2 hours of fuel
No, destination approved with no alternate
Yes
What is the fuel requirement for a 10% of Class II flag dispatch? (OpSpec B043)
Is an alternate required?
Does destination forecast need to be above minimums?
Burnout + 10% of Class II flight time + furthest alternate + 45 minutes of cruise
Yes, if greater than 6 hours flight time
Yes
What is the fuel requirement for a 5% reserve flag dispatch? (OpSpec B343)
Is an alternate required?
Does destination forecast need to be above minimums?
Burnout + 5% of flight time + furthest alternate + 30 minutes of hold
Yes, if greater than 6 hours flight time
Yes
What is the fuel requirement for a 5% of Class II flag redispatch? (OpSpec B343 and B043)
Is an alternate required?
Does destination forecast need to be above minimums?
Burnout + 5% of Class II flight time + furthest alternate + 45 minutes of cruise
Yes, if greater than 6 hours flight time
Yes
What events must be reported to Dispatch?
- If ETA will exceed planned by more than 15 minutes, or plus or minus 5 minutes from last reported
- Cruise altitude varies by 4.000 feet from planned
- Lateral deviation exceeds 100 miles
- Fuel quantity indicator failure
- If all contingency fuel will be burned
- Flight encounters weather significantly different than forecast, or moderate or greater is encountered
What dispatch method may use a flight redispatch procedure?
- 10% reserve flag dispatch
- 5% reserve flag dispatch
- 2 hour rule flag dispatch
Why are flights redispatched?
How are flights redispatched?
Flights over 6 hours are required to have an alternate regardless of forecast weather
- The flight is broken up into 2 segments, one over 6 hours and the final segment less than 6 hours
- If destination weather still does not require an alternate, flight may continue to destination without alternate fuel
When should the redispatch message be sent?
What is the ACARS code for redispatch acceptable?
Redispatch unacceptable?
No earlier than 2 hours prior to redispatch fix, but not less than 1 hour prior
RDA
RDU
When does an airplane enter an ETOPS area?
When it is more than 60 minutes from an adequate airport
How are ETOPS areas determined?
180 minutes (207 minutes in North Pacific) - Distance to alternate is calculated on one-engine-inoperative cruise speed in still air and standard conditions
Beyond 180 minutes (207 minutes in North Pacific) the shorter of
- The all-engines operating cruise speed at the normal all-engine cruise altitude, correcting for wind and temperature
- The approved one-engine-inoperative cruise speed at the normal one-engine-inoperative level-off altitude, correcting for wind and temperature
How is the ETOPS critical fuel scenario calculated?
- Fly to the most critical point (CP)
- Consider simultaneous failure of an engine and pressurization at the CP
- Descend immediately to 10,000 feet and upon approaching the alternate descend to 1,500 AGL and hold for 15 minutes
- Fuel to account for 5% error in enroute wind forecast
- MEL/CDL fuel burn penalties
- Fuel burn penalty for anti-icing and ice accumulation
