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Subtask 77-11-20-942-050
B. Close Access
(1) Make sure that the work area is clean and clear of tool(s) and other items.
(2) Remove the warning notice(s).
Subtask 77-11-20-861-051
C. Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002). Subtask 77-11-20-860-052
D. Do the EIS start procedure (upper and lower ECAM DU's) (Ref. TASK 31-60-00-860-001).
Subtask 77-11-20-710-051
E. Operational test:
(1) Do a minimum idle check (Ref. TASK 71-00-00-710-006) and a check for leaks.
(2) Do the steps below :
(a) On the MCDU, select the CFDS MENU page.
(b) Push the line key adjacent to SYSTEM/REPORT TEST.
(c) Push the NEXT PAGE mode key: a new SYSTEM REPORT/TEST page comes into view.
(d) Push the line key adjacent to the ENG indication: the SYSTEM REPORT/TEST ENG page comes into view.
(e) Push the line key adjacent to the FADEC 1A(1B) for engine 1.
(f) Push the line key adjacent to the FADEC 2A(2B) for engine 2.
(g) Push the line key adjacent to the LAST LEG REPORT.
(h) Make sure that the message "N2 SENS, J7(J8), ECU" is not in view.
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________ Subtask 77-11-20-860-053
A. Do the EIS stop procedure (Ref. TASK 31-60-00-860-002). Subtask 77-11-20-862-051
B. De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-002).
Subtask 77-11-20-410-051
C. Close the fan cowl doors: (Ref. TASK 71-13-00-410-040)
FOR 1000EM1
437AL, 438AR
FOR 1000EM2
447AL, 448AR
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TEMPERATURE - DESCRIPTION AND OPERATION
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1. General
_______
(Ref. Fig. 001)
The engine Exhaust Gas Temperature (EGT) is sensed and averaged by 9
R thermocouple probes (chromel/alumel). They are installed through one
R specific nozzle segment of the stage 2 nozzle assembly located in the Low
R Pressure Turbine (LPT) case.
A. The T495 thermocouple wiring harness consists of:
- Three identical and interchangeable thermocouple lead assemblies with two probes.
- One thermocouple lead assembly with three probes.
- One upper extension lead.
- One lower extension lead.
- One main junction box assembly.
B. Description
(Ref. Fig. 001, 002)
(1) Each segment of the two-probe lead assembly has:
- Two rigid metal tubes (Con-o-clad), each equipped at one end with a thermocouple probe and an integral flange for attachment to a related boss on the LPT case.
- A junction box at the other end of the rigid metal tubes with a receptable for the connection to the main junction box assembly (for two of the three lead assemblies) and to the lower lead
R assembly (for the third one). The junction box has a flange for R attachment to the LPT mounting flange S.
(2) Each segment of the three-probe lead thermocouple assembly consists of the items which follow:
(a) Three rigid metal tubes, each equipped with one thermocouple probe at one end and an integral flange for attachment to a related boss on the LPT case.
(b) A junction box at the other end of each rigid metal tube with a
receptacle connector for connection to the upper extension lead R and a flange for attachment to the LPT mounting flange S.
(3) The upper extension lead has:
- One rigid metal tube (Con-o-clad), equipped at each end with a mobile elbow-connector for connection to the main junction box assembly, and one of the three two probe thermocouple lead assemblies.
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