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Old 17th Feb 2011, 15:16
  #510 (permalink)  
bearfoil
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VnV2178B

With respect, the Controls systems are built by Hamilton Sundstrand, not Standard.
They are a division of UTC.

The "Oil Stub Pipe" was built by Rolls Royce.

Hamilton Sundstrand pitches themselves as "Tip To Tail" supplier for the A380.

DEP

For my "U" boat friend.

This Plug is located on the top of the Channel "B" module of the EEC. It is restrained by a "Lanyard" attached to the Engine's Fancase.
The DEP is purpose built to contain Data individualized for the specific powerplant to which it is attached. It is a Plug and Housing that contains a dual channel memory device called EEPROMS. One each is dedicated to a Channel of the EEC.

Each EEPROM has identical Data, to wit:

The Engine Serial Number, The Engine Ratings Selection, The TPR and THRUST TRIM Relationship, EGT TRIM, and Idle Trim.

The EEC, as you know, is programmed with ALL Engine Ratings. The DEP discrete DATA allows the EEC to select from its memory the applicable ratings for the aircraft in question.

TPR TRIM is adduced in engine test to report to the aircraft whilst in flight identical data for all engines across the wing. It obviously calibrates Engine Thrust (TRIM) tailored to the other engines on the wing as well. The DEP, then, is responsible for commanding identical settings from each engine on cockpit selections.

EGT TRIM is commanded from DATA programmed during Rolls Royce type test.
This limits EGT to pre-Programmed values, aligned with Cockpit reads.

IDLE TRIM is managed by the EEC, whether minimum or Approach, and it is The DEP that controls EEC's control limits.

EEPROM. Electrically Erasable Programmable Read Only Memory