Classic/-400 differences
Gordon Roxburgh Quote "For a no4 hyd system loss, what's the procedure for the wing gears, if nose and body are alternate?"
MarkerInbound "Quote "When you get to that point of the checklist it's:
Gear Lever -OFF
Make sure you're less than 270 knots
ALTN GEAR EXTEND WING Switch - ALTN
ALTN GEAR EXTEND NOSE/BODY switch - ALTN
When all the gear are down - Gear Lever Down "
I cannot speak for the -400, but for the Classic the procedure for a #4 hydraulic system loss was to extend the trailing edge flaps and the wing gear using the alternate means. The nose and body gear were extended normally, using the operating #1 hydraulic system.
An extract from a Classic QRH - I don't suppose that a -400 is very different - apart from the references to the F/E, of course..
If SYS 1 Or 4 Lost:
E TE ALT Flaps Arm Switch ........................................ARM
F Flap Lever ..............................................LANDING FLAP
E TE ALT Flaps ........................................EXTEND FLAPS
5 ON SCHEDULE
F Gear Lever ............................................................ ....OFF
C Airspeed ...............................................230 TO 250 KIAS
If SYS 1 Lost:
F Nose & Body ALT Gear
Extend Switches.................................................... ...ARM
If SYS 4 Lost:
F Wing ALT Gear Extend Switches .............................ARM
In Either Case When Gear Extension Required:
F Applicable ALT Gear
Extend Switches ........................................HOLD IN EXT
10 SEC THEN ARM
In All Cases At The Appropriate Time
F Gear Lever ............................................................ DOWN
E TE ALT Flaps..........................EXTEND ON SCHEDULE
· If HYD SYS 1 or 4 inoperative observe placard
160 KIAS while extending flaps from 25 to 30.