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

Today's Pop Quiz - 11/4/02

Mon Nov 04, 2002 9:27 pm

Md80
True or False
Rudder Movements at cruise at handled by the Yaw Damper Actuator as commanded by the DFGS. If the Yaw Damper actuator fails, the Rudder Servodrive serves as a backup for Yaw control during cruise

B737
True or False
Because the B737 Rudder A/P Actuator is not used during CAT approaches, it is NOT a CAT component.

MD80
Why would engine differential pressure be used in the MD80 landing light circuit??
 
dc10hound
Posts: 460
Joined: Fri Dec 15, 2000 4:18 pm

RE: Today's Pop Quiz - 11/4/02

Mon Nov 04, 2002 10:05 pm

3). To provide a signal for landing light automatic retract. An automatic retract circuit is energized when a pressure difference in excess of 70 psig is sensed on the engine differential pressure switch with the landing gear handle placed in the up position.
"Eagles soar. But weasels never get sucked into jet intakes.."
 
dc10hound
Posts: 460
Joined: Fri Dec 15, 2000 4:18 pm

RE: Today's Pop Quiz - 11/4/02

Tue Nov 05, 2002 12:25 am

Md80
True or False
Rudder Movements at cruise at handled by the Yaw Damper Actuator as commanded by the DFGS. If the Yaw Damper actuator fails, the Rudder Servodrive serves as a backup for Yaw control during cruise


I'll say False.

"Eagles soar. But weasels never get sucked into jet intakes.."
 
FBU 4EVER!
Posts: 980
Joined: Sat Jan 27, 2001 6:53 am

RE: Today's Pop Quiz - 11/4/02

Tue Nov 05, 2002 2:09 am

1. I'll say yes.This makes the use of parallel rudder still possible in case of a yaw damper failure.In case of an engine failure there will be a rudder input to correct for yaw.

3. As already mentioned in an above reply,the landing lights will retract if extended and an engine fails during take-off.
If the retract function does not work,there are fairly severe weight penalties for take-off and approach calculations.These penalties are a 590 kg reduction in allowed T/O weight and a 500 kg reduction in allowed landing weights.
"Luck and superstition wins all the time"!
 
LMP737
Posts: 4810
Joined: Wed May 08, 2002 4:06 pm

RE: Today's Pop Quiz - 11/4/02

Tue Nov 05, 2002 5:06 am

Cdfmxtech:

You've been busy the past couple days I see!

1)True

2)True. Only the elevator and aileron autopilot actuators are considered CAT components.

Never take financial advice from co-workers.
 
dc10hound
Posts: 460
Joined: Fri Dec 15, 2000 4:18 pm

RE: Today's Pop Quiz - 11/4/02

Tue Nov 05, 2002 5:07 am

Md80
True or False
Rudder Movements at cruise at handled by the Yaw Damper Actuator as commanded by the DFGS. If the Yaw Damper actuator fails, the Rudder Servodrive serves as a backup for Yaw control during cruise

I'll say False.



My reasons for stating false:


Rudder movements during cruise conditions are provided by a yaw damper actuator installed in series with the rudder control system. The actuator receives command signals from the DFGC. Rudder movements commanded for yaw damping will not cause the rudder pedals to move, and manual operation of the rudder pedals at any time will not affect yaw damper operation.

During an automatic landing, after glideslope and localizer track is established, and radio altitude is less than 1500 feet, command signals to the yaw damper series actuator are removed. Command signals to the rudder is then provided by a duplex rudder servodrive, which is in parallel with rudder pedals and provides the rudder authority needed during land operation, and the rudder pedals will move.
"Eagles soar. But weasels never get sucked into jet intakes.."
 
AAR90
Posts: 3140
Joined: Fri Jan 21, 2000 11:51 am

RE: Today's Pop Quiz - 11/4/02

Tue Nov 05, 2002 6:13 am

1) Dang it, I just can't recall that info.

2) Because the B737 Rudder A/P Actuator...

Duh, what rudder A/P actuator?

2)...is not used during CAT approaches, it is NOT a CAT component.

Not sure what you mean by "CAT approaches;" however, AA's 737-800 does not require yaw damper for any flight condition. For CAT-II Non-HUD approaches one autopilot and both engines are required. For CAT-II/III HUD approaches no autopilot (must be off by 1000' AGL) and "1 engine operating" is required.

3) automatic retraction of wing-tip mounted retractable landing lights during single-engine operation.
*NO CARRIER* -- A Naval Aviator's worst nightmare!
 
LMP737
Posts: 4810
Joined: Wed May 08, 2002 4:06 pm

RE: Today's Pop Quiz - 11/4/02

Tue Nov 05, 2002 7:49 am

AAR90:

The year before I was on a flight to ORD on a 737-800. At one point the plane had a dutch roll going on. My first thought was the yaw damper was inop. Sure enough when I checked the open items on the aircraft the yaw damper was placarded inop.
Never take financial advice from co-workers.
 
cdfmxtech
Posts: 1319
Joined: Wed Jul 05, 2000 11:37 am

RE: Today's Pop Quiz - 11/4/02

Tue Nov 05, 2002 7:59 am

1. False. The MD80 Rudder A/P Servo is only commanded by the DFGS during Autoland.
Correct - DC10hound

2. False. AAR90, duh was right. I just threw in the word "CAT" to try and confuse. It is all irrelevant since the B737 A/P cannot command the rudder to do anything. There is no A/P Rudder Actuator on that aircraft.
Correct - AAR90

3. Automatic Retract. It seems like everyone got that one.
DC10hound
Correct - FBU

LMP737 - I guess u could say I've been a "bit" busy in here recently.  Big thumbs up
 
LMP737
Posts: 4810
Joined: Wed May 08, 2002 4:06 pm

RE: Today's Pop Quiz - 11/4/02

Tue Nov 05, 2002 6:41 pm

Man, did I have a bad showing on this one. Better luck next time I guess.
Never take financial advice from co-workers.
 
cdfmxtech
Posts: 1319
Joined: Wed Jul 05, 2000 11:37 am

RE: Today's Pop Quiz - 11/4/02

Tue Nov 05, 2002 8:05 pm

True or false
B737
A engine pump overheat will not shut the pump off, but will give you the indication in the flightdeck, but an electric pump overheat will give the indication and shut the pump off.

MD80 (This may be an option)
When does Bithin' Betty yell during an Autopilot disconnect??
 
cdfmxtech
Posts: 1319
Joined: Wed Jul 05, 2000 11:37 am

RE: Today's Pop Quiz - 11/4/02

Tue Nov 05, 2002 8:06 pm

2nd day in a row that I did this...please disregard above question and answer in 11/5/2002 post.

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