INIT A: IDENTITY, PLANNING ASSUMPTIONS AND POSITION
On INIT A, enter EDDF/EGLL, accept the appropriate field and check the resulting airports. Add MC2026 and EGKK for the exercise flight identification and alternate. Read back the accepted data; a syntactically valid airport code can still be the wrong destination. [26, PDF pp. 102-112]
Enter CI 20 and FL280 for the stated exercise, with cruise temperature drawn from the flight's weather information. Keep the sources of these entries clear. The OFP describes the planned sector and its economic assumptions; the clearance determines the route and level actually authorised. [26, PDF pp. 102-112]
Complete the installed IRS position-initialisation workflow and compare the reference with the stand position. Alignment requires a valid initial position and a stationary aircraft. Frankfurt's airport reference point and the parked aircraft's location need not coincide. Check the position rather than accepting a familiar airport identifier as the whole verification. [26, PDF pp. 102-112]
Worked-flight inputs. Enter these in the corresponding INIT A fields; this is an entry worksheet, not a reproduced screen. [26, PDF pp. 102–104]
IN PRACTICE: INIT A: establish the sector
Before you begin: Active navdata checked; aircraft remains stationary. Use the exercise identity or the actual OFP consistently, rather than mixing the two.
1. Enter the airport pair
Action. Press INIT. Type EDDF/EGLL and select FROM/TO. If a route-selection page opens, inspect any offered company route before choosing it; do not accept an unfamiliar route merely because it is available.
Check. The accepted origin is EDDF and destination EGLL. Any selected company route belongs to that pair and still receives a route review. [26, PDF pp. 102-105]
2. Add the flight identification
Action. Enter MC2026 in FLT NBR for the fictional flight. For an actual sector use the intended flight identification from the dispatch information, and read it back after acceptance.
Check. The flight number belongs to this sector. An earlier loaded flight identification has not survived unnoticed. [26, PDF pp. 102-105]
3. Check the alternate
Action. Enter EGKK in the alternate field for this exercise. Review any automatically offered alternate/company-route selection and confirm the resulting airport; the destination and alternate are separate entries.
Check. EGKK is the intended alternate. Its appearance on INIT A does not establish that an appropriate alternate route or fuel plan has already been completed. [26, PDF pp. 102-105]
4. Set the cost index
Action. Enter 20 in COST INDEX for the exercise and read back the accepted value. If using an imported or stored route, check this field explicitly instead of assuming it carries the OFP assumption.
Check. The MCDU cost index agrees with the planning case and will support the corresponding managed-speed calculation. [26, PDF p. 108]
5. Set the cruise reference
Action. Enter 280 in CRZ FL/TEMP for the teaching flight. Read the displayed flight level. Use any separately required cruise-temperature information from the actual weather/flight plan, rather than inventing a temperature.
Check. The cruise reference displays FL280. A flight level and a forecast temperature have not been confused or copied from an unrelated example. [26, PDF p. 108]
6. Verify the position and alignment
Action. Check the initialized position against the actual aircraft location and stand, using the position/alignment interface of the installed Fenix unit. Keep the aircraft stationary during alignment and verify completion before relying on inertial guidance.
Check. The position reference is credible and alignment state is understood. This step does not prescribe an unverified button sequence from a different ADIRS standard. [26, PDF pp. 106-107]
Complete when: INIT A identifies the intended sector, alternate and planning assumptions; the initialized position agrees with the aircraft and alignment has been checked.