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User currently offlineA/c train From United Kingdom, joined Jun 2001, 501 posts, RR: 3
Posted (15 years 2 weeks 2 hours ago) and read 1032 times:

Afternoon chaps,
Watching a group of Techs and Mechanics refit the Reversers back on a RR TRENT 732 the other day and they had finished refitting and they had the pumps going on the blue system ACMP I think, and the Tech who was in the cockpit signalled down to the Tech on the ground who in turn operated a switch on the engine and then the T/R 's were being tested ,what switch is this?

4 replies: All unread, jump to last
User currently offlineF-WWAI From Andorra, joined Dec 1999, 131 posts, RR: 0
Reply 1, posted (15 years 1 week 6 days 17 hours ago) and read 965 times:

Hi Paul,
that is a safety switch, installed to make sure somebody stands close to the engine and watches nobody puts an arm in the T/R door when the T/R is operated from the cockpit via MCDU interface.

The system goes inert after a while though and you have to start over again to make the things move.

But what do you mean by Trent 732? Was it not rather a 772 ?

have fun,
 Smile/happy/getting dizzyFW

User currently offlineA/c train From United Kingdom, joined Jun 2001, 501 posts, RR: 3
Reply 2, posted (15 years 1 week 6 days 14 hours ago) and read 961 times:

yep772 apologies!
what does mcdu stand for?
cheers for reply!

User currently offlineVC-10 From United Kingdom, joined Oct 1999, 3727 posts, RR: 32
Reply 3, posted (15 years 1 week 6 days 4 hours ago) and read 953 times:
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If it's anything like the 757 the switch simulates oil pressure. On the 757 the reverser will only operate when the system see's oil pressure.

MCDU - Multipurpose Control Display Unit

User currently offlineF-WWAI From Andorra, joined Dec 1999, 131 posts, RR: 0
Reply 4, posted (15 years 1 week 5 days 22 hours ago) and read 936 times:

MCDU = Multifunction Control and Display Unit
it's the interface for maintenance to all system BITE memories and intelligence, and it's the Pilots interface to FMS, ACARS, SATCOM etc.
have fun
 Smile/happy/getting dizzy FW

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