cdfmxtech
Posts: 1319
Joined: Wed Jul 05, 2000 11:37 am

Today's Pop Quiz - 10/26/02

Sun Oct 27, 2002 1:15 am

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.

All B737s
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.
 
cdfmxtech
Posts: 1319
Joined: Wed Jul 05, 2000 11:37 am

RE: Today's Pop Quiz - 10/26/02

Sun Oct 27, 2002 1:18 am

Correction for question 1.
B737-300 thru 900
1). True or false. Without a system failure the 737 Thrust Reverser CAN be deployed in the air.
 
Mr Spaceman
Posts: 2723
Joined: Thu Mar 15, 2001 5:09 am

RE: Today's Pop Quiz - 10/26/02

Sun Oct 27, 2002 1:52 am

Hello Cdfmxtech.

I think these pop quiz's are really neat. Please keep doing them.

1). I hope the answer is False, but, I suspect that it's true.

2). I think the pilots would need to deploy the Ram Air Turbine (RAT), however, on second thought, I believe the RAT might only be used to generate electrical power.

This is what you call a "Wild Guess" response. But it's still fun!  Big thumbs up

Chris  Smile
"Just a minute while I re-invent myself"
 
delta-flyer
Posts: 2631
Joined: Mon Jul 30, 2001 9:47 am

RE: Today's Pop Quiz - 10/26/02

Sun Oct 27, 2002 2:12 am

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.

Pete
"In God we trust, everyone else bring data"
 
LMP737
Posts: 4800
Joined: Wed May 08, 2002 4:06 pm

RE: Today's Pop Quiz - 10/26/02

Sun Oct 27, 2002 6:14 am

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.  Big grin

Never take financial advice from co-workers.
 
cdfmxtech
Posts: 1319
Joined: Wed Jul 05, 2000 11:37 am

RE: Today's Pop Quiz - 10/26/02

Sun Oct 27, 2002 1:04 pm

LMP737 - you got one of two. Yes u can deploy the Thrust Reversers at less than 10ft OR Ground mode. I don't think it ever happens, but it is available.

As for question 2, the crew would have to do nothing. The standby system will automatically kick in with a loss of hydraulics with flaps down in the air or greater than 60 knots.

And LMP, as for your question, there are 3 on each TR sleeve, and one on each side is a locking actuator. So there are 6 total on each engine.

Mr Spaceman, glad u like this. I hope it is received well by all. I like doing it. As for your answer, the B737s are not equipped with Ram Air Turbines.

I'll try and think of a couple for the B757s and then rotate from there.
 
LMP737
Posts: 4800
Joined: Wed May 08, 2002 4:06 pm

RE: Today's Pop Quiz - 10/26/02

Mon Oct 28, 2002 3:12 am

I got the second one wrong. How embarrassing. Embarrassment

The first one I had to think about. The way you worded it aroused my suspicion. However I jumped on the second one a little to quickly. Next time I'll be more careful.

Here's another pop quiz. We know that the TR has three actuators, one of them being the locking actuator. Which one is the locking actuator, top, middle or bottom?  Smile
Never take financial advice from co-workers.
 
TWAMD-80
Posts: 962
Joined: Tue Oct 16, 2001 8:25 am

RE: Today's Pop Quiz - 10/26/02

Mon Oct 28, 2002 5:25 am

I'll call the first answer False. I recall a crash caused by thrust reversers deploying in the air. As for the second, I'm not really sure.

TW
Two A-4's, left ten o'clock level continue left turn!
 
cdfmxtech
Posts: 1319
Joined: Wed Jul 05, 2000 11:37 am

RE: Today's Pop Quiz - 10/26/02

Mon Oct 28, 2002 9:05 am

LMP - if I hadn't dont the TR deactivation procedure as many times as I have, I may have forgotten that it is the upper actuator
 
LMP737
Posts: 4800
Joined: Wed May 08, 2002 4:06 pm

RE: Today's Pop Quiz - 10/26/02

Mon Oct 28, 2002 11:24 am

Cdfmxtech:

You are correct, it is the top one.  Smile
Never take financial advice from co-workers.

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