Airliners.net

G4Doc2004

RE: Best/Worst GPU Sockets?

I concur about the early Metros and the Beechjets, but the King Air B100 was awful too. The GPU receptacle was just aft of the main gear on the lower <acronym title="Meridiana Air (Spain) and Régionnair (Canada)">RH</acronym> side nacelle, and you were always right in the blast of the exhaust from t...

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G4Doc2004

RE: Nacelle Acoustic Barrier Panels...FOD?

I can't speak for the large engines, but I have seen the acoustical lining peel up and go thru the fan of a P&W 306 turbofan engine. It did not damage the fan or go thru the core of the engine, but did cause severe damage to the abraidable lining in the inlet that acts as the ice impact area. That a...

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G4Doc2004

RE: Simple T/R Question

<TABLE BORDER=0 ALIGN=CENTER WIDTH=95% style="border-top: 1pt #28455E solid;border-right: 1pt #1B2E3F solid;border-bottom: 1pt #1B2E3F solid;border-left: 1pt #28455E solid;table-layout:fixed;border-spacing:0;padding:0;border-collapse: collapse;" bgcolor=#1E3951><tr><td><font size=2 face="ARIAL, Hel...

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G4Doc2004

RE: Falcon 20 - Holes In Spoilers?

2H4 you are exactly correct. Several Bizjets that I have worked on over the years have had spoilers with holes in them, or even serrated trailing edges, to reduce the vibration and turbulence over them when they are extended in flight, ultimately to reduce the noise or "rumble" heard in the cabin. C...

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G4Doc2004

RE: Learjet 45XR Assembly On Nat Geo Channel

I caught it the other night here in Chicago while channel surfing.........not a bad episode! But they kept calling the engines "motors"........

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G4Doc2004

RE: Are The 737 Wheels On The Outside In This Picture?

The fastest business jet flying right now is the Citation X (Mach .92) and it's wheels are exposed a-la the B-737 as well. When retracted, the edge of the tire sits just below the fairing.

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G4Doc2004

RE: Defueling A Lear 35

Actually, they make a rig that filters the fuel as it comes out of the aircraft and then filters in one again as it is being pumped back in. We have such a rig at our hangar. Works very well, and everytime I sample the fuel before it is pumped back in it is perfectly clear. Our tank is stainless ste...

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G4Doc2004

RE: Slowest Landing Speed For A Jet Aircraft

The Citation Sovereign (CE680) can be landed down in the 92-95KT range depending on weight. I flew the sim at <acronym title="Wichita - Mid-Continent (ICT / KICT), USA - Kansas">ICT</acronym> and got it down to 89KT, but I don't think that would ever happen in a real scenario. Just a couple of mecha...

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G4Doc2004

RE: T-Tail's Without Deep-Stalls

<TABLE BORDER=0 ALIGN=CENTER WIDTH=95% style="border-top: 1pt #28455E solid;border-right: 1pt #1B2E3F solid;border-bottom: 1pt #1B2E3F solid;border-left: 1pt #28455E solid;table-layout:fixed;border-spacing:0;padding:0;border-collapse: collapse;" bgcolor=#1E3951><tr><td><font size=2 face="ARIAL, Hel...

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G4Doc2004

RE: T-Tail's Without Deep-Stalls

The delta fins on the Lears (i.e. 31, 40/45, and 60) primarily eliminate the need for a yaw dampener, but do also aid in not allowing a deep stall by acting as airfoils to push the nose over. The main way it was overcome, at least on the corporate jets I work on, is the use of the stick pusher, whic...

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G4Doc2004

RE: Please Name A TurboJet Engine In Civilian Use

Don't forget the old JT-12A's used on old Sabreliners......and the RR Viper on old DH-125's

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G4Doc2004

RE: What Is This?

If I read the first post correctly, ZuluAviator994 said it was the flap, not the slat in the photo. Therefore, that would indeed be a flap actuator in the photo, not the telescoping ani-ice duct for the slat. Looks like a trailing edge to me.......

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G4Doc2004

RE: Citation X Anti-collision Light: Two Locations

Curleyheadboy, those are pulse lights, an option that "flashes" the landing lights in the root of each wing on and off, to increase visibility. The Citation X I work on does not have them, but I have seen them on NetJets aircraft.

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G4Doc2004

RE: Citation X Anti-collision Light: Two Locations

Actually, the beacon is moved to the lower part of the fairing to accomodate a SATCOM antenna mounted inside the fairing.

[Edited 2008-04-11 13:41:29]

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G4Doc2004

RE: Murphy's Laws For Aircraft Maintenance

Charlienorth.....LOL! <img src="/aviation-forums/graphics/smilies/smile.gif" alt="Smile"> <acronym title="Air Comores and Crimea Air (Ukraine)">OR</acronym> how about the clown before you who thought that B1/2 was better used as glue than just a sealant on a panel or a leading edge? Gotta love...

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G4Doc2004

RE: Murphy's Laws For Aircraft Maintenance

If you are pulling a panel that has 100 screws in it, the last screw you remove will be the one that has stripped threads, a galled nutplate, or a messed up head, requiring you to drill it and remove it with an easy out. No part that is being installed on an aircraft will fit properly until it is cu...

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G4Doc2004

RE: Why No Smokeless JT3Ds After So Many Years?

I'd have to say that they haven't for several reasons. First, it's an old engine, who wants to dump that much R&D money into old technology? It would be like putting a smog pump on an old 50's era car....not really worth it! And, who would spend the money if someone offered to upgrade the engine at ...

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G4Doc2004

Corporate MX Techs-Your Favorite To Work On & Why?

I spent all weekend on call this weekend, mostly troubleshooting a Lear 60 with engine issues and a balky upper cabin door. As I was working, I spoke to many others who traverse thru our hangar and got to thinking about a topic of interest. For all you <acronym title="Mexicana Airlines (Mexico)">MX<...

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G4Doc2004

RE: Cessna Citation Columbus

Being a Citation X mechanic, I like the airframe, but really am disheartened at the choice of the P&W engines. We also operate 2 P&W 306 powered aircraft, and we've had a real bad time with them. Between several BOV failures, resulting in a <acronym title="Air Calédonie International (France)">SB</a...

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G4Doc2004

RE: The APU Info Thread

The most popular units used in the bizav field are the Garrett/Honeywell GTCP-36-150, the <acronym title="Aer Arann Express (Ireland)">RE</acronym>-220, and for older Falcons, Hawkers, and others, the very anemic Solar T62-T43. <acronym title="Air Vallee (Italy)">DO</acronym> a search under any of t...

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G4Doc2004

RE: Little Stick (or Probe?) In Engine Intake?

Some engines also use a TGT probe, such as the older CJ610 engine, as well as APU's. This probe is visible if you look up the tailpipe, as it is aft of the last stage turbine wheel.

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G4Doc2004

RE: Worst Job In Maintenance

R&R the gear motor on King Air 100/200's
ANY interior squawks.......
R&R the ACM on a 690 Turbo Commander
R&R the ACM on a Beechjet 400A
As already stated, anything involving Skydrol on your skin
Inverter R&R on 31/35A Learjets
R&R windshields on 20 or 30 series Learjets......aaarrrggghhhh!

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G4Doc2004

RE: Engine FOD Pics....if You Are Interested

There's a large inspection sheet that has to be complied with for a FOD incident in the AE3007 <acronym title="SAM (Colombia)">MM</acronym>...the core is the first on the list. Why......because if it went down the core, everthing else is water under the bridge. That's an engine change then. The core...

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G4Doc2004

RE: Engine FOD Pics....if You Are Interested

ShyFlyer...... <img src="/discussions/graphics/smilies/smile.gif" alt="Smile"> <img src="/discussions/graphics/smilies/smile.gif" alt="Smile"> No EICAS messages at all indicating any issues.....no exceedances noted after a T&L download either. We did a Vibe Survey on the run after installi...

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G4Doc2004

Engine FOD Pics....if You Are Interested

We were doing a routine 600 GVI on the AE3007 engines on our Citation X when I noticed some blood and feathers in aft bypass duct. I crawled up in the intake and started looking at the fan blades and stator vanes and sure enough, one of the stator vanes was damaged. We pulled the fan and replaced th...

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G4Doc2004

RE: Kalman Filter/curved Lines

When I went to LJ60 initial they touched on this. Simply put, the Kalman Filter is an algorithm in the hardware that gives updated velocity and position data for the navigation systems that allows for several introduced errors. Do a google search and you'll get all the info you need.

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G4Doc2004

RE: Aviation Research Group

Thanks 2H4. The personnel that ARG/US uses are all ex-FAA, ex-airline types with 30+ years of field experience. They really know their stuff, and that rating is a culmination of a lot of work. I was really impressed with the whole process.

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G4Doc2004

RE: Aviation Research Group

We just got our ARG/US Platinum rating here at the company I work for, after about a year of work. The individuals sent to our facility were very knowelgeable and professional. To put it bluntly, it was just like a FAA base inspection as far as the <acronym title="Mexicana Airlines (Mexico)">MX</acr...

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G4Doc2004

RE: Small Plane Crash Near Van Nuys, CA

I worked on a C525 for a year. If I recall correctly, there is a microswitch under the door locking mechanism (the key lock, not the 2 latches) that actuates the light. If the lock pawl got loose, it would give a false indication in the cockpit, as the pawl would allow the switch to open. Pilots wol...

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G4Doc2004

RE: Hubs On 707 P&W Engines

I think that the size of the inlet and nose bullet were purposeful as to contol the speed and amount of air that entered the 1st stage compressor. Remember, we're talking very low bypass engines (turbojets) here. And, not to be a picky person, but they are not motors. They're engines.

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G4Doc2004

RE: To Soap Or Not To Soap?

It all depends on the engine service plan you enroll the engines on when you purchase the aircraft. The service plans require SOAP samples be taken at specific intervals (150-300 hours) to ascertain the "health" of the engine. Garrett engines are very reliable, but programs like <acronym title="Minn...

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G4Doc2004

RE: Dassault Falcon Thrust Reverser

I work on a 900, S/N 39. The center reverser is indeed on the <acronym title="Melbourne - Tullamarine (MEL / YMML), Australia - Victoria">MEL</acronym>, but landing weights and runway lengths are more critical, as is why the flightcrew is briefed if the <acronym title="Transbrasil SA Linhas Aereas">...

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G4Doc2004

RE: In-Flight Entertainment Systems

Gulfstream is developing their new system called BBW (Broadband Wireless) for all their new Gulfstreams.......reportedly it will allow for wireless internet surfing while inflight among other things....go to <a href="http://www.gulfstream.com" target=_blank>www.gulfstream.com</a> for details<br><br>...

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G4Doc2004

RE: Whats Wrong With This Photo

MD11Engineer and 777WT, you can get the valve core removal tools in the US from Cosgrove Aircraft. I have several in my box and they work great!! They run about $48 but are great to have. <a href="http://www.cosgroveaircraft.com/newmarketimages/968RB.jpg" target=_blank>http://www.cosgroveaircraft.co...

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G4Doc2004

RE: Whats Wrong With This Photo

I've never changed a nosewheel on a 777, but on corporate jets we just set the parking brake and jack the nose. I will admit to using chocks as a safety backup though. You only have to lift the nose wheels about an 1" off the pavement. Where's it gonna go????

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G4Doc2004

RE: Whats Wrong With This Photo

There aren't 3 other guys standing behind him holding cups of coffee watching him work???

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G4Doc2004

RE: Axial/centrifugal Engines

Actually, most APU's, such as the Garrett GTCP36-150 series and the Sunstrand T-62 series have a "centrifugal" turbine, which is actually called a radial inflow turbine. For many apparent reasons, this type of turbine would be highly inefficient in any other application than this.

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G4Doc2004

RE: Skydrol Vs 5606

411A, I never did state that I washed with it <img src="/discussions/graphics/smilies/smile.gif" alt="Smile"> However, there are <acronym title="Mexicana Airlines (Mexico)">MX</acronym> tasks that lead to the inevatibility of getting covered in the offending fluid, such as R&R of a side brace ...

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G4Doc2004

RE: Skydrol Vs 5606

411A, I must disagree (respectably). First, how does it "support higher pressures reliably"? Hydraulic fluid is not heated all that hot and only breaks down when contaminated, regardless if it is mineral based or synthetic. All fluids regardless of chemical makeup are susceptible to the same rule of...

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G4Doc2004

RE: Citation X With Higher Range - Possible?

Hmm........we fly ours at .92 all the time on long range (2+ hour) flights. The structure on the Citation X is so light that adding fuel tanks and winglets would add too much weight therefore affecting <acronym title="President Airlines (Cambodia)">TO</acronym> performance and range. It's fine as it...

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G4Doc2004

RE: Wacky Painted Wings And Weight

I don't think that's zinc chromate paint. After doing a serach on that airline, you'll see that paint is actually part of Siberian Airlines paint scheme.

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G4Doc2004

RE: Lear60 Question

Also as a part of that <acronym title="Air Calédonie International (France)">SB</acronym> you had to change the MLG actuators as well, as they were not able to absorb the added weight of the new brakes and retract the gear. It was a big joke at Bombardier. I think there is still an <acronym title="A...

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G4Doc2004

RE: CRJ-200 APU's

I believe it uses the Garrett (Honeywell) GTCP-150RJ APU.

[Edited 2006-08-10 02:00:15]

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G4Doc2004

TU154M Cockpit Layout Question

https://www.airliners.net/open.file/1087183/M/

Can someone tell me in the cockpit of this Tu-154M where the gear and flap handles are located? I have wondered this for awhile and have yet to locate them.

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G4Doc2004

RE: What Is The Starter Like?

Here is a good cross section view of an ATS, the air inlet being on the left. <center><table align=center BORDER=0 width=352 cellpadding=0 cellspacing=0 STYLE="border: 1px black solid;"><tr><td><a href="/uf/view.file?id=536883808&filename=115194287749cAS6.gif" target=_blank><img src="/uf/536883808/1...

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G4Doc2004

RE: Tech Photos

I'll share a few....go to the link below and page down. I'm at Gulfstream <acronym title="Savannah - International (SAV / KSAV), USA - Georgia">SAV</acronym> this week doing a engine change. We just had both of our Tay 611-8's overhauled.... <a href="http://citationdoc680.tripod.com/my_aviation_phot...

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G4Doc2004

Repair Statons/Svce Center Work Station Software?

Hi guys...I am currently researching a new software system for our repair station. I'd like to get a good idea of what is being used out there and the good and bad experiences associated. I want to be able to input <acronym title="World Airways (USA)">WO</acronym>'s, squawk sheets, and parts on vari...

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G4Doc2004

RE: Most Annoying Bizjet To Work MX On?

<TABLE BORDER=0 ALIGN=CENTER WIDTH=95% style="border-top: 1pt #28455E solid;border-right: 1pt #1B2E3F solid;border-bottom: 1pt #1B2E3F solid;border-left: 1pt #28455E solid;table-layout:fixed;border-spacing:0;padding:0;border-collapse: collapse;" bgcolor=#1E3951><tr><td><font size=2 face="ARIAL, Helv...

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G4Doc2004

RE: Most Annoying Bizjet To Work MX On?

Raytheon Beechjet 400A is a real pain in the butt........access to anything is limited to those who are very small and flexible....systems are straight forward but they bury everything including the battery. The Westwind is a pretty easy aircraft to work on, but it leaks fuel from the inboard spar a...

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G4Doc2004

Mx Sucked Into Engine At IAH?

http://www.cnn.com/2006/US/01/16/airplane.fatality/index.html

Anyone have anymore info on this incident? This is awful......

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