Date: 24 Mar 98 11:38:27 From: email@example.com Organization: http://extra.newsguy.com References: 1
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On 21 Mar 98 16:31:24 , Robert Kochersberger <firstname.lastname@example.org> wrote: >The last time I rode in the cockpit of a Lufthansa Airbus 321 (earlier >this week), the pilot told me he'd just done simulator practice on >landing the plane after a complete failure of the fly-by-wire system. He >said the plane can be landed using only rudders and elevator trim, but >it's a very challenging exercise. Any Airbus pilots out there who can >comment on how it's done? Hi, I'm a A320 FO and participated in the exercise several times. Initially, I thought the plane would be unflyable but that is not the case. Once the fly-by-wire system degardes to this mode, then the first thing one must do is to disconnect the autothrust as it would cause uncontrollable oscillations due to thrust-pitch coupling. Then, you have three control sources: rudder, pitch trim and thrust. Once the plane is trimmed for straight and level flight ( constant thrust ) then gentle inputs on the rudder will enable you to steer a course, say on an ILS. Once established on the LOC, you can then take gear and flaps keeping power constant, but trimming up to establish a 700fpm rod. Now , thrust comes in as well. you can make small adjustments for pitch up or pitch down ( more thrust, less thrust). If you've done everything right, you'll come on the runway, but you have no way to flare. Add a little thrust at 30ft and the PNF will downtrim immediately on runway contact. It's easier said than done, however. Having said that, our instructor demonsatrated a complete fbw and hydraulic failure leaving us with no flying control. He still managed to land the plane using thrust control only!!!