General Tech Trivia

[FlyboyZR1]

Here are some commonly asked checkride questions that I came across and figured I would throw them out here for people to answer, good luck.

What are the two different classes of NOTAMs?

What is a 337?

What is a service bulletin? Is it mandatory compliance?

What does TBO stand for and is it mandatory compliance?

What are the four different types of oxygen?

Which is more dangerous, hyperventilation or hypoxia? Why?

Does the CG position change during flight? If so, how?

Why is having a nitrogen excess in the bloodstream called the bends?

[USMCmech]

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What are the two different classes of NOTAMs?

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Informative and regulatory.

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What is a 337?

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This is a form that an A&P fills out documenting a major repair or alterations

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What is a service bulletin? Is it mandatory compliance?

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It is not mandatory. It is an informative letter describing an maintince issue with your aircraft/engine/prop/

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What does TBO stand for and is it mandatory compliance?

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Time Before Overhaul. Not mandatory for pt 91 operations. Pt 135 operators with a approved maintence program can also get extensions. I personally know a guy who flys pipeline patrol in a C-172 with over 7000 hrs on it.

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What are the four different types of oxygen?

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Common myth/OWT. There is just one type of o2.

The three common types marketed out there, industrial/welders o2, medical o2, and aviators breathing oxygen. I can't think of the fourth?

AC 43.13-1A (Acceptable Methods, Techniques, And Practices — Aircraft Inspection And Repair):
Only oxygen marked "Aviators Breathing Oxygen" which meets Federal Specification BB-0-925a Grade A or equivalent may be used in aircraft breathing oxygen systems

Now I will bet you 100$ that the o2 in the bottles at Bubbas Welding Supply is just as pure as the o2 for sale at the FBO, and it's half the price. In fact it came out of the same tnak at Acme Oxygen distribution company. Now, back in the old days there was likely some diffrence in the machinery used for aircraft, but that is no longer the case.

Also filling your o2 bottle on most airplanes falls under "routine serviceing and maintence" which may be performed by anyone with a pilots liscense. In most circumstances you do not need an A&P do do this.

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Which is more dangerous, hyperventilation or hypoxia? Why?

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Personally I would say hypoxia is more dangarous. Most of the time it creaps up on the victim, and won't get better on it's own.

Hyperventilation will continue untill you calm down or you pass out. Then your body will slow it's breathing and correct itself.


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Does the CG position change during flight? If so, how?

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Yes, as fuel burns off your CG will definatly move.

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Why is having a nitrogen excess in the bloodstream called the bends?

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Because the early victims of this would curl up in a ball from the joint pain.

[FlyboyZR1]

USMCMech,

I don't actually know the answers to all these questions, but I agree with most of yours.

I remember reading something about the two classes of NOTAMs being Class I and Class II, but can't find it. Where did you get informative and regulatory from?

Is a 337 the same form an A&P uses for an STC?

Also which way does the CG move as fuel is burned off during flight?

[USMCmech]

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USMCMech,

I don't actually know the answers to all these questions, but I agree with most of yours.

I remember reading something about the two classes of NOTAMs being Class I and Class II, but can't find it. Where did you get informative and regulatory from?

Is a 337 the same form an A&P uses for an STC?

Also which way does the CG move as fuel is burned off during flight?

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I may be wrong about the NOTAMs, I just ask the breifer if there are any that will affect my flight.

Yes, after completeing and STC a form 337 must be filled out.

In light airplanes it useually moves slightly foward, but not much.

Glad I could help.



I'm personaly waiting for the "but my instructor said" flamers to weigh in on my comments about the Oxygen.

Very few people know about the regulations, but everyone belives that you must get FAA approved oxygen for your FAA approved airplane. In fact the refrence I quoted is the only place that I could ever find that ever mentions "aviators breathing oxygen". It is another common old wives tale. [img]/ubbthreads/images/graemlins/banghead.gif[/img] Hit your CFI with it next time you see him. [img]/ubbthreads/images/graemlins/cool.gif[/img]

[TallBoy85]

1) There are actually 3 types of NOTAMS. Distant, Local and FDC. For example a TFR is a type of FDC NOTAM.

2) A 337 Form is a Major Repair or Alteration form recertifying an aircraft's airworthiness after...drum roll please...a major repair or alteration!

3) A service bulletin is released by the aircraft manufacturer and is a non-mandatory directive to spend more money on aircraft parts and pieces. If it was safety related, it would be an...AIRWORTHINESS directive.

4) TBO is time since base overhaul. It's non-regulatory and can be exceeded by 250-500 hours depending typically on how many times the engine has been rebuilt. Survey says the number one thing to keep on the down low from your aircraft insurance company.

5) Aviation, Medical, Welding and Research. Boo yeah!

6) Hyperventilation and Hypoxia while apparently exhibiting similar symptoms in some are polar opposites. Hyperventilation can make you pass out, Hypoxia can kill you. Survey says! Hypoxia is the most dangerous aeromedical factor of the two.

7) Try flying from PRC-LAS without touching the yoke or the trim once you get to cruise and changing the position of your seat to control your altitude. I've been told burning gas is also a primary way to change the CG during flight.

8) Nitrogen infused into the cells of the body is dangerous because as you ascend, nitrogen in your body's cells turns to a gas and enters the bloodstream. It also seems to have an affinity for the abdominal cavity. Therefore, when your abdominal cavity, along with all your joints are full of nitrogen gas, you bend over because it hurts so F---ing much. [img]/ubbthreads/images/graemlins/bandit.gif[/img]

[roundout]

actually, there are four types of NOTAMs. FDC, local, distant, and GPS. [img]/ubbthreads/images/graemlins/spin2.gif[/img]

[Alchemy]

The two different classes of NOTAMS:

PUBLISHED and UNPUBLISHED

in other words, the kind you won't get in a briefing, and the kind you will.

If anyone tries to put notams into just two categories, that is how I've seen it done. FDC/Local/Distant refers to how they're dissiminated.

[TallBoy85]

Well obviously I've been crushed by the enduring power of the UND Flight Department. GPS NOTAMs? I've been out of the game for too long...

And can you site me a source for this published and unpublished stuff? Normally I just get my weather online so all NOTAMs are published, not just the ones that I have to pick up the telephone to have read off to me too fast to comprehend. [img]/ubbthreads/images/graemlins/bandit.gif[/img]

[FlyboyZR1]

Here's some more questions for you super pilots ...

Do an airplane's state and federal registration expire, are they transferrable, and when do you need to change them?

List six signs of an approach stall in a fixed-wing aircraft.

How would you characterize the stability characteristics of the Piper Arrow (if you've flown one)?

What makes the air moving over the top of the wing stay on the wing?

What is the center of pressure? Does it ever change, how?

Is carburetor heat de-ice or anti-ice, why?

When we use an altimeter setting, what are we telling the altimeter?

Explain the long-term effects of overloading an aircraft.

[Alchemy]

AIM 5-1-3(3)(c) talks about published NOTAMS vs. unpublished. I can't think of any other way to split NOTAMS into just two "classes". The AIM calls FDC/Local/Distant "categories" of NOTAMS.

[TallBoy85]

The all powerful AIM strikes again... [img]/ubbthreads/images/graemlins/bandit.gif[/img]

[roundout]

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Well obviously I've been crushed by the enduring power of the UND Flight Department.

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don't hate the playa, hate the game

/ice t

[img]/ubbthreads/images/graemlins/insane.gif[/img]

[E_Dawg]

The two classes of notams are class I unpublished and class II published; it's in the AIM, got asked it on the ifr ride.

[FlyingFish]

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8) Nitrogen infused into the cells of the body is dangerous because as you ascend, nitrogen in your body's cells turns to a gas and enters the bloodstream. It also seems to have an affinity for the abdominal cavity. Therefore, when your abdominal cavity, along with all your joints are full of nitrogen gas, you bend over because it hurts so F---ing much.

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Actually it's already a gas. If it's in a solid or liquid form, you've got even bigger problems [img]/ubbthreads/images/graemlins/wink.gif[/img]

The bends has to do with the saturation point of a gas dissolved within a liquid for a given pressure. There exists a pressure gradient that allows a dissolved gas to remain in solution as long as the rate of pressure change isn't pushed beyond a certain point.

If you ascend, and therefore decrease the pressure exerted on your body at a rate higher than your body is naturally able to deal with (via respiration), your body is unable to keep the nitrogen dissolved in solution and the nitrogen comes out of solution and bubbles form. The bubbles, if left to grow large enough, can do some pretty severe things. They can collect in joints, travel in the blood stream to your brain and can actually cause an aneurism. It can be painful and it's definitely not a good thing.

Now you guys and gals no where the last half of my username came from... [img]/ubbthreads/images/graemlins/wink.gif[/img]

[FlyboyZR1]

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The two different classes of NOTAMS:

PUBLISHED and UNPUBLISHED

in other words, the kind you won't get in a briefing, and the kind you will.



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Do local and distant notams eventually get published in the NTAP, or just FDC notams?