COwrenchturner
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What Is The Difference Between A PCU & A PCA?

Wed Dec 06, 2006 11:22 pm

Could anybody help me? I am wondering what the difference is between a Power Control Unit and a Power Control Actuator. This is in reference to flight controls.
Aircraft maintenance can be done fast, cheap or right. Pick two.
 
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HAWK21M
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RE: What Is The Difference Between A PCU & A PCA?

Thu Dec 07, 2006 1:35 am

The same.
On the B737 its called a PCU.
on the B757 its called a PCA.
Function the same.
regds
MEL
I may not win often, but I damn well never lose!!! ;)
 
COwrenchturner
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RE: What Is The Difference Between A PCU & A PCA?

Thu Dec 07, 2006 3:17 am

Thanks for your help!
Aircraft maintenance can be done fast, cheap or right. Pick two.
 
avt007
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RE: What Is The Difference Between A PCU & A PCA?

Sat Dec 09, 2006 11:16 am

Some manufacturers use different terms for different styles of actuator on the same aircraft. For example, an actuator that operates a ground spoiler is an on/off type actuator- up or down. But on the flight spoiler next to it, a similar actuator is capable of modulating, in other words the spoiler can move in small increments any where from retracted to fully extended.
 
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HAWK21M
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RE: What Is The Difference Between A PCU & A PCA?

Sat Dec 09, 2006 6:09 pm

Quoting Avt007 (Reply 3):
For example, an actuator that operates a ground spoiler is an on/off type actuator- up or down. But on the flight spoiler next to it, a similar actuator is capable of modulating, in other words the spoiler can move in small increments any where from retracted to fully extended.

I dont think that would be the reason for the different terms.Its just that the Manufacturer called a PCU a PCA on the next model & it stuck.
regds
MEL
I may not win often, but I damn well never lose!!! ;)
 
Airgypsy
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RE: What Is The Difference Between A PCU & A PCA?

Sun Dec 10, 2006 7:51 am

Names are "invented" by bright young people with no field experience or history. Naming convention failures by engineering are the nightmare of mechanics and material control people.
So, what is a THS?

Airgypsy
 
fr8mech
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RE: What Is The Difference Between A PCU & A PCA?

Sun Dec 10, 2006 8:40 am

Quoting Airgypsy (Reply 5):
So, what is a THS?

Trimmable Horizontal Stabilzer, courtesy of the French.
When seconds count...the police are minutes away.
 
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Starlionblue
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RE: What Is The Difference Between A PCU & A PCA?

Sun Dec 10, 2006 9:53 am

A couple of (probably incomplete) lists:

Airbus acronyms: http://www.rosboch.net/aviation.htm#AirbusAcronyms
Boeing acronyms: http://www.rosboch.net/aviation.htm#BoeingAcronyms
"There are no stupid questions, but there are a lot of inquisitive idiots." - John Ringo
 
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HAWK21M
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RE: What Is The Difference Between A PCU & A PCA?

Mon Dec 11, 2006 2:43 pm

Quoting Fr8mech (Reply 6):
Trimmable Horizontal Stabilzer, courtesy of the French

Thats another one like the SAM on the B757 which reads as Stablizer Trim and Elevator Assymetrical Module,so shouldn't it be STEAM.
 Smile

Quoting Starlionblue (Reply 7):
0

Interesting.Thanks.

regds
MEL
I may not win often, but I damn well never lose!!! ;)
 
ReidYYZ
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RE: What Is The Difference Between A PCU & A PCA?

Sat Dec 16, 2006 1:33 pm

On the A330 course, as we were getting into the nitty-gritty of the CBT (computer based training) we would end each day with a de-brief. On asking the instructor about all the acronyms, he told us that there was a dark windowless office somewhere in TLS that had 6-10 Airbus employees just working on acronyms. Boeing has its' fair share, but the 'bus CBT really exaggerates with the Ferris Bueller teacher (Ben Stein) 'anyone, anyone' monotone narration.

[Edited 2006-12-16 05:36:36]
 
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HAWK21M
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RE: What Is The Difference Between A PCU & A PCA?

Sat Dec 16, 2006 5:00 pm

Quoting ReidYYZ (Reply 9):
he told us that there was a dark windowless office somewhere in TLS that had 6-10 Airbus employees just working on acronyms

Wonder why no Window  Smile
regds
MEL
I may not win often, but I damn well never lose!!! ;)
 
kaddyuk
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RE: What Is The Difference Between A PCU & A PCA?

Sat Dec 16, 2006 5:31 pm

Quoting HAWK21M (Reply 10):
Wonder why no Window

Because if there were windows, they're realise that not everything has to be made into an acronym!
Whoever said "laughter is the best medicine" never had Gonorrhea

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