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HAWK21M
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B752 Differences Along The Line

Sun Aug 19, 2007 1:50 am

Working on RB211-535C powered B752SFs & since soon the RB211-535E4 powered B752SFs would be arriving at the Airline.The RB211-535Cs being the older B752s there were a lot on upgrades along the way.
Anyone aware of the upgrades Airframe wise.I've heard about the Ice detector,the Stab trim switches & Alt L/G ext switch type have been varied.
regds
MEL
I may not win often, but I damn well never lose!!! ;)
 
Buzz
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RE: B752 Differences Along The Line

Sun Aug 19, 2007 7:08 pm

Hi MEL, Buzz here. Some of ours have a new type RH recirc fan installed, the original type didn't last well. So there's a mod to install a 767 recirc fan in it's place.

Let's see, several years ago the cockpit Korry switches were replaced to remove the #387 bulbs - the replacements have LED's.

There are dozens of mods, but at 3 AM while waiting for flights to straggle in for the night my brain can't think of many more.

g'day
 
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HAWK21M
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RE: B752 Differences Along The Line

Mon Aug 20, 2007 5:22 pm

Some of ours have a new type RH recirc fan installed, the original type didn't last well. So there's a mod to install a 767 recirc fan in it's place.
Our Freighters dont have the RH recirculation fan Installed so I guess that mod would be not applicable to Freighters.However what was the advantage of the B767 fan.

several years ago the cockpit Korry switches were replaced to remove the #387 bulbs - the replacements have LED's.
Guess this was due burn out.

There are dozens of mods, but at 3 AM while waiting for flights to straggle in for the night my brain can't think of many more.
No probs.Rest well & get back.Much appreciated.

regds
MEL
I may not win often, but I damn well never lose!!! ;)
 
tdscanuck
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RE: B752 Differences Along The Line

Mon Aug 20, 2007 9:55 pm

Quoting HAWK21M (Thread starter):
Anyone aware of the upgrades Airframe wise.

There were roughly 900 changes to the 757 during its production run. That doesn't count Service Bulletins issued after production ended or minor changes (like swapping one fastener for another).

Tom.
 
Buzz
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RE: B752 Differences Along The Line

Mon Aug 20, 2007 10:01 pm

Hi MEL, Buzz here... busy night, lots of late airplanes.
The advantage to the 767 RH recirc fan is that it doesn't seem to fail... the 757 RH recirc fan tends to die after a few years.
And the 767 fan has a higher airflow, nice to have in the summer.

g'day
 
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HAWK21M
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RE: B752 Differences Along The Line

Tue Aug 21, 2007 1:52 am

Quoting Buzz (Reply 4):
The advantage to the 767 RH recirc fan is that it doesn't seem to fail.

Thanks.
Why is it difficult to get Manufactured reasons for a particular upgrade to an Aircraft before it is delivered.Or reasons like why a certain part was considered ideal on that type  Smile
regds
MEL
I may not win often, but I damn well never lose!!! ;)

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