减速板手柄在反推打开时不能到up位

heroyuexin · 发表于 2013-8-13 18:57:47

Automatic Speed Brake Operation
(a) Provide electrical power (PAGEBLOCK 24-22-00/201).
WARNING: BEFORE PROVIDING HYDRAULIC POWER, CHECK THAT PERSONNEL AND
EQUIPMENT ARE CLEAR OF ALL FLIGHT CONTROL SURFACES. TRAILING EDGE
FLAP, AILERON, SPOILER, RUDDER AND ELEVATOR CONTROL SURFACES ARE
FULLY POWERED. ISOLATE ANY SYSTEM NOT INTENDED FOR OPERATION TO
PREVENT INJURY TO PERSONNEL OR DAMAGE TO EQUIPMENT.
(b) Provide systems 2, 3, and 4 hydraulic power (PAGEBLOCK 29-11-00/201).
(c) Check that the control wheels are in the neutral position.
(d) Place thrust levers 1 and 3 to thrust position of more than 10‘.
(e) Place speed brake control lever to ARM.
(f) Move thrust levers 1 and 3 to thrust position of less than 6’. Speed brake control lever will
automatically move aft to UP position, and all spoilers will extend to 45‘.
NOTE: The position of spoilers 4 and 12 is displayed on the EICAS status page.
(g) Move thrust levers 1 and 3 to thrust position of more than 10’. The speed brake control
lever will automatically move forward to DN position, and all spoilers will fully retract.
(h) Move thrust levers to thrust position of less than 6‘.
(i) Move reverse thrust levers 2 and 4 to deployed position. Speed brake control lever will
automatically release from DN detent and will move to UP position. All spoilers will extend
to 458.
(j) Move reverse thrust levers to stowed position.
(k) Move speed brake control lever to DN. All spoilers will fully retract
747-400飞机长时间停场，之前没有任何问题快出场了在测试时发现自动减速板工作时，手柄arm位，1.3号反推杆大于10度，此时减速板手柄却卡止在飞行止档位而不到up位，排故半天没找到原因，现在怀疑操作台下方的减速板机构有问题，不知道有哪位师傅遇到过，真心求助