jamesbuk
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Do Airliners Have Creep Marks?

Fri Nov 11, 2005 7:07 am

hi guys and gals

i was doing the A check of a Cessna 150 and it got me wondering on commercial jets like 777 A320 etc do the have creep marks on the wheels

thanks guys
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SlamClick
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RE: Do Airliners Have Creep Marks?

Fri Nov 11, 2005 7:15 am

Yes there is a creep named Mark at just about every airline out there.

The most famous of all though was "Mark Pock" in "Coffee, Tea or Me?"
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Bernard Shakey
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RE: Do Airliners Have Creep Marks?

Fri Nov 11, 2005 7:18 am

Unfortunately, they do. In some rural areas of the world, it is very common to see individuals walking across active runways. Occassionally, the inevitable does occur and the mess on the aircraft tires is horrific. Notice the individual third from the left in this picture:
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Photo © Michael Arcellana



This individual has many bad habits and has been generally known as a creep for many years. Just moments after this photo was taken, he was mauled by an A320 - resulting in creep marks on the landing gear. Hope this helps.
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ArmitageShanks
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RE: Do Airliners Have Creep Marks?

Fri Nov 11, 2005 10:47 am

What are creep marks?
........
 
320tech
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RE: Do Airliners Have Creep Marks?

Fri Nov 11, 2005 12:23 pm

Very amusing, guys. Airliner tires do not generally have creep marks because they don't have inner tubes. Creep marks are lines painted across the junction of the wheel and tire to show if the tire has moved on the wheel. If this happens with a tube tire, it's likely that the tube has folded.
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SlamClick
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RE: Do Airliners Have Creep Marks?

Fri Nov 11, 2005 3:04 pm

What we in the military called slippage marks.

Whole new string of dumb jokes on that one.
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AR1300
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RE: Do Airliners Have Creep Marks?

Fri Nov 11, 2005 3:30 pm

I don't get any of this.Creep marks is a thing on the wheels?on the struts?on the RWY??it means killing someone??uh???


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HAWK21M
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RE: Do Airliners Have Creep Marks?

Fri Nov 11, 2005 5:44 pm

Quoting SlamClick (Reply 1):



Quoting Bernard Shakey (Reply 2):


What are you guys talking about.  Smile


Its a paint covering the tire & rim of the Hub to identify any slippage of the tire on the hub which could lead to damage to the Valve stem.

regds
MEL
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TimT
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RE: Do Airliners Have Creep Marks?

Mon Nov 14, 2005 11:31 am

Years ago, TWA international flight crews numbered the wheels according to how many crewmembers there were on board. After landing and parking at the gate, the number that was at 6 o'clock won the pot. Usual amount was $1.00 per crewmember.
 
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HAWK21M
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RE: Do Airliners Have Creep Marks?

Mon Nov 14, 2005 1:05 pm

Quoting TimT (Reply 8):

Nice Idea  biggrin 
regds
MEL
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jamesbuk
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RE: Do Airliners Have Creep Marks?

Tue Nov 15, 2005 3:14 am

lol so you could end up getting like $20 xtra at the end of a flight sounds like quite a bit of fun
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jarheadk5
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RE: Do Airliners Have Creep Marks?

Tue Nov 15, 2005 2:25 pm

Quoting TimT (Reply 8):
flight crews numbered the wheels according to how many crewmembers there were on board. After landing and parking at the gate, the number that was at 6 o'clock won the pot.

We called that "Taxi Roulette", but ours was more like actual roulette that what's described above. The bosses for the brake keys on the inboard half of the nose wheel (same wheel assembly for nose and main wheels on the CH-53E) would be numbered, 1 to 16 IIRC, and we'd each throw in a buck for however many numbers we wanted. Usually 4 crew, 4 numbers each; the lucky one walked from the aircraft $16 richer...

Oh, and on-topic - we had slippage marks on our tires & wheels, and they were tubeless.

[Edited 2005-11-15 06:26:45]
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Francoflier
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RE: Do Airliners Have Creep Marks?

Sun Nov 20, 2005 5:38 am

Quoting 320tech (Reply 4):
Airliner tires do not generally have creep marks because they don't have inner tubes.

I am no mechanic, but wouldn't tire slippage be a problem even on a tubeless tire?

(Loss of brake effectivity, risk of N leakage?)

Rgds,
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khenleydia
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RE: Do Airliners Have Creep Marks?

Sun Nov 20, 2005 6:11 am

Quoting JarheadK5 (Reply 11):
Usually 4 crew, 4 numbers each; the lucky one walked from the aircraft $16 richer...

Just imagine what the pot would be on a full A380 during a flight involving a crew change.  Big grin

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HAWK21M
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RE: Do Airliners Have Creep Marks?

Sun Nov 20, 2005 4:57 pm

Quoting Francoflier (Reply 12):
I am no mechanic, but wouldn't tire slippage be a problem even on a tubeless tire?

(Loss of brake effectivity, risk of N leakage?)

A risk of Deflation is present when the Tire slides over the hub.
regds
MEL
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HAWK21M
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RE: Do Airliners Have Creep Marks?

Sat Feb 04, 2006 11:24 pm


Creep mark.
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kaddyuk
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RE: Do Airliners Have Creep Marks?

Sun Feb 05, 2006 6:29 am

Isn't creep also a form of Metal fatigue and/or corrosion?
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HAWK21M
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RE: Do Airliners Have Creep Marks?

Sun Feb 05, 2006 3:02 pm

Quoting Kaddyuk (Reply 16):



Isn't creep also a form of Metal fatigue and/or corrosion?

Defination of Creep :- The flow or plastic deformation of metals held for long periods of time at stresses lower than the normal yield strength. The effect is particularly important if the temperature of stressing is above the recrystallization temperature of the metal.

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MEL
I may not win often, but I damn well never lose!!! ;)
 
kaddyuk
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RE: Do Airliners Have Creep Marks?

Sun Feb 05, 2006 11:26 pm

Quoting HAWK21M (Reply 17):
Defination of Creep :- The flow or plastic deformation of metals held for long periods of time at stresses lower than the normal yield strength. The effect is particularly important if the temperature of stressing is above the recrystallization temperature of the metal.

I thought so, when boroscoping the Nozzle Guide Vanes i remember seeing to check for Creep...
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