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US Airways Airbus A319, A320, A321 Notes 77 Imaginary Centerline You may have had an imaginary friend in your childhood. I didn’t. We won’t talk about yours. However, the Airbus does have “imaginary” extended centerlines that you can use. If you have been vectored off course and are cleared to join a radial but don’t have the nav segment available you may be able to join it with no reprogramming at all. In this example you are on an arrival and vectored off course. Then you are cleared to rejoin the radial for the arrival. However, the current nav segment has already been cleared. As long as the next segment is the same radial the FMGC will still join the “imaginary” extended centerline of the next nav segment. This will also work in the case of being vectored for final approach. If you are vectored to join outside the defined nav segment the FMGC will still join the extended centerline. Just press NAV engage and as long as the present heading will cross the extended centerline it will join at the point of crossing. The display will not show a nav line but it will show miles left or right of course until on the actual nav segment. With the FMS 2 the course will actually show so you don’t have to “imagine it”. Auto Clear I don’t have any technical info on this one so I just call it auto clear. On vectors if you go close enough past a waypoint there is some FMGC logic that says you won’t use that waypoint and it will automatically clear it. This happens most often on close vectors for approach near the approach course on downwind. FMS 2 Differences US Airways East is now installing new FMS systems on the Airbus 319/320/321 aircraft. For the most part the new system is very similar to the old one. Some of the benefits of the new system are faster processors, LCD screens in the MCDU that allow lighter weight, less heat and brighter screens and of course new and improved functions. MCDU Keyboard Changes: The / (slash) and – and + signs are swapped. Also the – and + keys are combined so if you need plus or minus you may have to press more than once to get the appropriate sign. A space (SP) key is added where the + key used to be so you can now use the SP key instead of the OVFY Δ as a “spacebar” key. Arrow keys will now be used to page instead of the NEXT PAGE key. Left and right arrow keys ( ← , →) are now available along with the current up and down arrow keys. Bright (BRT) and DIM keys are now added to increase or decrease the screen intensity instead of a knob to turn. US Airways Airbus A319, A320, A321 Notes 78 Data Page – New CLOSEST AIRPORT function, shows nearest four airports with bearing and distance to the airport. An additional airport may also be entered by the pilot. New EQUITIME POINT function, shows point in flight plan it will take equal time to return to origination or continue to destination. This point is displayed on the ND as a circle on the routed with ETP next to it. New A/C STATUS functionality, To change the performance factor a CHG CODE of PRF must be used. After code is accepted /PERF changes may be made INIT Page - IRS INIT is on two pages now. From INIT page press IRS INIT prompt. The LAT and LONG may now be scrolled and the ALIGN IRS prompt will be shown on this second page. F-PLN - Any change to the F-PLN page will now bring up TMPY ERASE (temporary erase) and TMPY INSERT prompts. The changes to the flight plan will be shown in amber on the ND. Pres TMPY ERASE to eliminate the changes or press TMPY INSERT to make the changes permanent into the flight plan. Also a new feature, ONCE UNDO/THEN ERASE allows changing only the last change made. Each press will undo only the last step until you are down to the original change and only TMPY ERASE will be shown. There is no NEXT PAGE with F-PLN. A very nice new feature allows all route programming to be done at the same time on one page. Once you press a LSK for a fix you can continue to enter route or fix changes on the new page until complete. You do not have to jump back and forth. Just enter the route in the VIA box (for example, J80) on the left side and the next fix in the TO box (for example, DBL) on the right side. You may continue with the next route (for example, J80) and fix (for example, OAL) until done. Then select the back to the TMPY F-PLN page once there ERASE or INSERT your changes. Along Track waypoints are now available in FMS2. You may build a new fix such as for crossing restrictions based on a current fix in the flight plan. For example, if cleared to cross www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：航空资料5
