(a) Put a warning notice to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
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(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a warning notice to tell persons not to energize the FADEC 1(2).
Subtask 77-21-10-010-078
B. Get Access
(1) Open the fan cowl doors: (Ref. TASK 71-13-00-010-040) FOR 1000EM1 437AL, 438AR FOR 1000EM2 447AL, 448AR
Subtask 77-21-10-040-076
C. Make sure that the thrust reverser is unserviceable (Ref. TASK 78-30-00-481-041).
Subtask 77-21-10-010-092
D. Open the thrust reverser doors: (Ref. TASK 78-36-00-010-040)
FOR 1000EM1
451AL, 452AR
FOR 1000EM2
461AL, 462AR
4. Procedure
_________
R (Ref. Fig. 407/TASK 77-21-10-991-309)
Subtask 77-21-10-020-061
R A. Removal of the Lower Right (R/H) Thermocouple Lead Assembly (Lower Right R T495 Sector)
R (1) Cut and remove the lockwire.
R (2) Disconnect the lower extension lead connector (80) from the lower R right T495 sector junction box (parallel junction box) (20).
R (3) Remove the parts which attach the lower right T495 sector as follows:
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R -------------------------------------------------------------------------------
R REMOVE | FROM
R |
R Nuts (10) | Studs (30)
R |
R |
R Bolts (60) | Bracket (40)
R |
R |
R Clamp (50) |
R Nuts (90) | Flange S
R |
R Bolts (70) |
R Bolt (120) | Bracket (100)
R |
R Clamp (110) |
| NOTE | | On LPT case, at the 4:15 and the | 5:30 o'clock positions (Detail B) | | On flange S, at the 6 o'clock position | (Detail C) | | | At the 5:15 o'clock position (Detail D) | | | On flange S, at the 4:30 o'clock position | (Detail E) |
R (4) Carefully remove the lower right T495 sector (20) from the LPT holes R and from the engine.
R (5) Install the blanking plugs and caps on all disconnected parts. R
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R Lower Right Thermocouple Lead Assembly (Lower Right T495 Sector) R Figure 407/TASK 77-21-10-991-309- 13 (SHEET 1)
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R Lower Right Thermocouple Lead Assembly (Lower Right T495 Sector) R Figure 407/TASK 77-21-10-991-309- 23 (SHEET 2)
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R Lower Right Thermocouple Lead Assembly (Lower Right T495 Sector) R Figure 407/TASK 77-21-10-991-309- 33 (SHEET 3)
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TASK 77-21-10-400-029
R Installation of the Lower Right Thermocouple Lead Assembly
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