(c)  
Remove the bolts and nuts for the clamps that attach the EGT probe cable to the bracket.

 (d)  
Remove the lockwire and the two bolts that attach the EGT probe and bracket to the turbine exhaust case.

 (e)  
Move the bracket rearward and remove the EGT probe.

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 77-11-01
 ALL  ú ú N02 Page 404 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
S 034-021-N00
 (6)  Do the steps that follow to remove the EPR probe:
 (a)  
Disconnect the pressure manifold from the EPR probe.

 (b)  
Remove the remaining bolt that attaches the EPR probe to the turbine exhaust case.

 (c)  
Remove the EPR probe from the turbine exhaust case.

 S 034-022-N00
 (7)  Install the protection covers on the turbine exhaust case, on the pressure manifold, and on the EPR and EGT probes.
 TASK 77-11-01-404-023-N00
 3. Install the Engine Pressure Ratio (PT4.95) Probe (Fig. 401)
________________________________________________
 A. Equipment
 (1)  
M303, M305, or M307 Bergen Mechanical Crimper
 Bergen Cable Technologies
 170 Greg Street

 P.O. Box 1300
 Lodi New Jersey 07644 USA

 B.
Consumable Materials

 (1)  
D00244 Silver Goop, PWA 36001

 (2)  
G02332 Ferrule, Safety Cable (P05-292)

 (3)  
G02334 Lockwire, AS3214-02 (P05-289)

 (4)  
G02335 Cable, Safety (P05-291)

 C.
References

 (1)  
AMM 71-00-00/501, Power Plant

 (2)  
AMM 71-11-06/201, Core Cowl Panels

 (3)  
AMM 77-11-00/501, EPR (PT4.95) Indicating System

 (4)  
AMM 77-11-01/501, Engine Pressure Ratio (EPR) PT4.95 Probe

 (5)  
AMM 77-21-01/401, EGT (TT4.95) Thermocouple Probe

 (6)  
IPC 77-11-01, Fig. 1

 D.
Access

 (1)  
Location Zones 412 Engine 1 - Turbine Exhaust Case 4 or 10 o'clock 422 Engine 2 - Turbine Exhaust Case 4 or 10 o'clock 432 Engine 3 - Turbine Exhaust Case 4 or 10 o'clock 442 Engine 4 - Turbine Exhaust Case 4 or 10 o'clock

 (2)  
Access Panels
 417 Left Core Cowl Panel - Engine 1
 418 Right Core Cowl Panel - Engine 1
 427 Left Core Cowl Panel - Engine 2
 428 Right Core Cowl Panel - Engine 2
 437 Left Core Cowl Panel - Engine 3
 438 Right Core Cowl Panel - Engine 3
 447 Left Core Cowl Panel - Engine 4
 448 Right Core Cowl Panel - Engine 4

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 ALL  ú ú N01 Page 405 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
E.  Procedure
 S 434-024-N00
 (1)  
Remove the protection covers from the EPR probe and the turbine
 exhaust case.

 S 424-025-N00

 (2)  
Do the steps that follow to install the EPR probe:

 (a)  
Install the EPR probe into the turbine exhaust case and align the holes for the bolts.

 (b)  
Install the bolt that attaches the EPR probe to the turbine exhaust case. 1) Lubricate the threads of the bolt with the Silver Goop. 2) Tighten the bolt to 54-60 pound-inches

 (6.1-6.8 newton-meters).
 S 434-026-N00
 (3)  Do the steps that follow to install the EGT probe at the 10 o'clock
 position:

 (a)  
Install the EGT probe into the EPR probe and align the holes for the bolts.

 (b)  
Lubricate the threads of the bolts with the Silver Goop.

 (c)  
Install the bolts.
 1) Tighten the bolts to 54-60 pound-inches
 (6.1-6.8 newton-meters).

 2)  Install lockwire or the optional safety cable and ferrule to the bolts.
　
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