|
777 fuel press on off "press" means off in PPF
In Prelimanary preflight inspection .All the overhead lights button display off and on or blank meaning off expect for the fuel panel,if you check for on it says that check pressure light illuminated on all light except for centre pumps which has pressure lights extinguished,So for fuel panel is the off meaning of primary fuel pumps,like eng and centre main tanks PRESSURE acutally meaning thats its OFF actually.Since ive previously flown airbus im a bit unsure.thanks as it has dark cockpit philosophy,also
|
It's been 20 years since I was in the cockpit of a 777 (as an engineer in flight testing - not a pilot) but here is what I recall. Hopefully someone else can confirm or correct this.
The PRESS light on the fuel pump switches means low pressure. However, unlike the main tank boost pumps, the center tank pump low pressure lights are inhibited if the pump switches are off because normal operation of the airplane includes operation with those switches off (after the center tank is depleted of if there is no mission fuel in the center tank). The Boeing "dark cockpit" approach is to not have lights illuminated on the overhead panel for normal conditions. If you look at the switches with electrical power on airplane but all pump switches off, the main tank boost pumps switches will have the PRESS lights illuminated but the center tank pump switches will not. If the center tank pump switch is on but the pump output pressure is low due to lack of fuel or a pump failure, the PRESS light will be illuminated. |
Originally Posted by Dave Therhino
(Post 10911214)
It's been 20 years since I was in the cockpit of a 777 (as an engineer in flight testing - not a pilot) but here is what I recall. Hopefully someone else can confirm or correct this.
The PRESS light on the fuel pump switches means low pressure. However, unlike the main tank boost pumps, the center tank pump low pressure lights are inhibited if the pump switches are off because normal operation of the airplane includes operation with those switches off (after the center tank is depleted of if there is no mission fuel in the center tank). The Boeing "dark cockpit" approach is to not have lights illuminated on the overhead panel for normal conditions. If you look at the switches with electrical power on airplane but all pump switches off, the main tank boost pumps switches will have the PRESS lights illuminated but the center tank pump switches will not. If the center tank pump switch is on but the pump output pressure is low due to lack of fuel or a pump failure, the PRESS light will be illuminated. |
During normal preflight, I check overhead amber lights as 6832!
Electrical panel- 4 OFFs, 2 DRIVEs, total 6 amber lights. Hydraulic panel- 8 FAULTs Fuel panel- 3 PRESSs ( With AC power available and the APU selector in the ON position, the left forward fuel pump operates automatically regardless of switch position, therefore no PRESS light illuminated) Bleed Air panel- 2 OFFs |
Remember this. Somewhere further down the line, your checkers will mess with your overhead panel pushbuttons before your sim check:}
|
Originally Posted by flightleader
(Post 10911377)
Remember this. Somewhere further down the line, your checkers will mess with your overhead panel pushbuttons before your sim check:}
|
On the 787 it should be 8 amber lights on the electrical panel and 6 on the hydraulic - every generator has their own drive light. I see that is different on the 777.
edit: And the 777 hydraulic system does indeed have 8 fault lights vs 6 on the 787 upon further review. |
Because there are 8.
|
| All times are GMT. The time now is 19:40. |
Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.