Cdfmxtech From United States of America, joined Jul 2000, 1341 posts, RR: 26 Posted (12 years 3 months 4 days 4 hours ago) and read 1361 times:
These are the last 2 questions on the B737. Next week I will switch to one of the following aircraft for a couple of days a rotate until the idea gets old, which I'll know by lack of response:
757, 767, MD80
Sorry guys, those are the only aircraft that I really know. I can't ask questions about smaller aircraft, which was requested earlier. I'm sure different "versions" of this pop quiz will pop up in the forum.
B737-300 thru 900
1). True or false. Without a system failure the 737 Thrust Reverser be deployed in the air.
2). Just after takeoff with flaps down, you lose A & B hydraulics. What action needs to be taken to get Standby Hydraulics on to get that rudder available.
Delta-flyer From United States of America, joined Jul 2001, 2676 posts, RR: 6
Reply 3, posted (12 years 3 months 4 days 3 hours ago) and read 1338 times:
Well, I don't know the system architecture of the 737, but I will wager that the engineers designed it thus....
1. The thrust reverser probably requires weight-on-wheels to activate, so I would say FALSE.
2. I believe there is an EMP that powers the Standby Hydraulic system that is fed by an emergency generator from the APU. I would assume that the APU runs during take-off and landing, so it would be a matter of switching on standby hydraulics from the overhead panel.
LMP737 From , joined Dec 1969, posts, RR:
Reply 4, posted (12 years 3 months 3 days 23 hours ago) and read 1293 times:
You can deploy the T/R's in flight. When the airplane is less than ten feet off the deck. The T/R control system allows you to do this. By the time they are fully deployed the plane will have already touched down. Under normal flight conditions the sync lock prevents TR deployment during flight.
Here's another question. How many actuator does each TR have? And of those how many are locking actuators?
As for a Hydraulic A and B failure you would reach up switch to STBY RUD on your FLT CONTROL A and B guarded switches.
The EDMP for the stby hyd sys runs off ships power so you really wouldn't need the APU running. Unless of course you lost both IDG's at the same time. Or you lost both engines. But then not having stby hyd would be the least of your worries.