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Today's Pop Quiz - 11/4/02  
User currently offlineCdfmxtech From United States of America, joined Jul 2000, 1338 posts, RR: 27
Posted (11 years 5 months 2 weeks 1 day 16 hours ago) and read 1498 times:

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??


11 replies: All unread, jump to last
 
User currently offlineDc10hound From United States of America, joined Dec 2000, 463 posts, RR: 5
Reply 1, posted (11 years 5 months 2 weeks 1 day 15 hours ago) and read 1475 times:

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.."
User currently offlineDc10hound From United States of America, joined Dec 2000, 463 posts, RR: 5
Reply 2, posted (11 years 5 months 2 weeks 1 day 13 hours ago) and read 1451 times:

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.."
User currently offlineFBU 4EVER! From Norway, joined Jan 2001, 998 posts, RR: 7
Reply 3, posted (11 years 5 months 2 weeks 1 day 11 hours ago) and read 1425 times:

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"!
User currently offlineLMP737 From , joined Dec 1969, posts, RR:
Reply 4, posted (11 years 5 months 2 weeks 1 day 8 hours ago) and read 1395 times:

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.



User currently offlineDc10hound From United States of America, joined Dec 2000, 463 posts, RR: 5
Reply 5, posted (11 years 5 months 2 weeks 1 day 8 hours ago) and read 1392 times:

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.."
User currently offlineAAR90 From United States of America, joined Jan 2000, 3451 posts, RR: 47
Reply 6, posted (11 years 5 months 2 weeks 1 day 7 hours ago) and read 1388 times:

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!
User currently offlineLMP737 From , joined Dec 1969, posts, RR:
Reply 7, posted (11 years 5 months 2 weeks 1 day 6 hours ago) and read 1371 times:

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.


User currently offlineCdfmxtech From United States of America, joined Jul 2000, 1338 posts, RR: 27
Reply 8, posted (11 years 5 months 2 weeks 1 day 6 hours ago) and read 1371 times:

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


User currently offlineLMP737 From , joined Dec 1969, posts, RR:
Reply 9, posted (11 years 5 months 2 weeks 19 hours ago) and read 1331 times:

Man, did I have a bad showing on this one. Better luck next time I guess.

User currently offlineCdfmxtech From United States of America, joined Jul 2000, 1338 posts, RR: 27
Reply 10, posted (11 years 5 months 2 weeks 17 hours ago) and read 1314 times:

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??


User currently offlineCdfmxtech From United States of America, joined Jul 2000, 1338 posts, RR: 27
Reply 11, posted (11 years 5 months 2 weeks 17 hours ago) and read 1313 times:

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


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