OM-A Operating Procedures Flashcards
Flight Preperations, requirements to commence a flight
Aircraft is airworthy, MEL/CDL are adhered to, Documents on board, ground facilities and services for planned flight are available/adequate, provisions of fuel/oil/oxygen/MSA/minima/alternate are complied with, weight of a/c at takeoff is so tat the flight can be conducted in compliance with MSA/MFa, any other operation limit can be complied with, an OFP must be completed for each intended flight
Minimum Sector Altitude
Represents the safe altitude around a nav station or aerodrome reference point. If no other info is present: 25 nm and may be valid for a specific sector or approach runway. In case of RNAV approach, MSA may be replaced by Terminal Arrival Altitude. MSA and TAA provide 1000ft obstaccle clearance down tot he intermediate approach segment.
Route MORA
The MFA (Minimum Flight Altitudes) on OFPs are based upon route MORA providing 1000ft clearance for terrain up to 5000ft, 2000ft clearance above, within 20 NM of the route segment centreline. Minimum value depicted on OFP is 2000ft.
Minimum Grid Altitude
Represent the lowest safe altitude which can be flown off track. It is calculated by rounding up the elevation of the highest obstruction within the respective grid area to the next 100ft and adding 1000ft for terrain/obstruction up to 6000ft and 2000ft for terrain/onbstruction above 6000ft. Shown in hundres of feet, lowest indicated is 2000ft.
Temperature correction, when and where?
Below -10 degrees surface temperature correction must be applied to:
- DA/MDA
- Non precision approaches to minimum altitudes after passing the FAF
- Final Approach Fix
Terrain and Wind awareness
With high wind speeds there is an altimeter error. Be aware when flying over mountainous terrain with strong winds; consider increasing Minimum Flight Altitudes.
RFFS Requirement approved aerodromes
319/320 cat 6
321 cat 7
For departure & destination in case of temporary downgrade for not more than 72 hours: two categories below.
Take-off alternate, destiation alternate and enroute alternate non UK RFFS 4, UK RFFS 5.
Isolated Aerodrome
One for which alternate and final reserve fuel required to the nearest adequate destinationalternate is more than fuel to fly for 2 hours at normal cruise consumption above the destination aerodrome including final reserve fuel.
Maximum distance from an adequate aerodrome
60 minutes flight time based on one-engine inop cruise speed at standard temperature instill air
319: 380nm
320/321: 400nm
Weather planning minima destination & alternate - what should be considered?
Weather reports and forecast for destination & alternates shall be considered during a period of +/- 1 hour of the estimated time of arrival.
For destination (and take-off alternate): ceiling shall be considered for a type A or circling operation.
When is a take-off alternate required? What should the wx forecast be?
When performance or meteorolgoical conditions preclude a return to the departure aerodrome. Meteo conditions are suitable for return when they are at or above the applicable minima for the instrument approach in use. The weather reports or forecast for the t/o alternate shall be at or above minima for the expected instrument approach.
Take off alternate - what is the maximum distance?
One hour OEI cruise speed at ISA conditions in still air maximum. Max distance 320 nm
When are two destination alternates required?
When the wx reports or forecasts are below the applicable planning minima, no meteo info available or when the landing performance requirements cannot be assured at a destination due to dependence on a specific wind component or runway state.
Planning minima for destination alternate and fuel ERA
Depends on type of approach, areodrome ceiling and RVR/VIS.
Type B: DA/H + 200 ft RVR/VIS +550m
Type A with minimum of 200’ or less: DA/H+200ft RVR/VIS +800m
Two or more Type A, seperate nav aid: DA/H or MDA/H +200ft RVR/VIS + 1000m
Other tpe A instrument approaches: DA/H or MDA/H +400ft RVR/VIS+1500 m
Circling apprach MDA/H+400ft or VIS+1500m
When is a fuel ERA reqruied?
Under alternative flight planning procedures
When can you use Converted Meteoroglical Visibility
For planning purposes if wx minimia is expressed in RVR.
In flight, CMV to RVR when RVR is not reported.
Table in Om-a
Flights without destination alternate, what is required?
Under alternative flight planning a flight may be planned without destination alternate provided that the destination has two seperate landing runways where the risk of a single event or metereolgoical detorioration at that single aerdrome will not eliminate safe landing options.
The duration of flight shall not exceed 6 hours (or 4 in case of replanning)
The wx reports forecast +/- 1 hour ETA shall be at least: ceiling 2000ft or circling height +500ft, whichever is greater. Ground visibility at least 5km
Additional fuel is carried
Destination alternate for PBN operations
Only select an aerdrome as dest alternate if an instrument approach procedure that does not rely on GNSS is available either at that aerdrome or at the destination aerdorme.
Alternative flight planning - flight monitoring function not available, where to find this information?
Increased safety margin is needed, table is in OM-A.
