Left EGT Thermocouple Harness and Probe Installation
Figure 402 (Sheet 2)
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9 PROBE EGT SYSTEM (SOFT MOUNT) ú 77-21-01
ú CONFIG 3 ú C01 Page 410 ú Mar 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
S 034-026-C03
(2) Do these steps to disconnect the connectors:
(a)
Disconnect the connector (on the lower extension harness) from the left junction box with the fork wrench.
(b)
Put protective caps on the connector and the receptacle.
S 024-027-C03
(3) Do these steps to remove the probes:
(a)
Remove the two bolts that attach each probe to the engine boss.
(b)
ENGINES WITH EGT AIR DEFLECTORS; Remove the EGT air deflector from each probe.
(c)
Carefully remove the probes from the engine.
(d)
Put protective caps on the probes and the engine bosses.
TASK 77-21-01-404-006-C03
5. Left EGT Thermocouple Harness and Probes Installation
_____________________________________________________
A. Equipment
(1) Fork Wrench - AN8508-14, Snap-on Tools Company, 8049-28th St Kenosha, WI 53140
B. Consumable Materials
(1) D00601, Grease, (CP2101) graphite - GP460, Aeroshell 8
C. References
(1)
AMM 71-11-02/201, Fan Cowl Panels
(2)
AMM 77-21-00/501, EGT Indicating System
(3)
AMM 78-31-00/201, Thrust Reverser System
D. Access
(1)
Location Zones
504 Left Engine - Left Side
604 Right Engine - Left Side
(2)
Access Panels
5738L Left Thrust Reverser - Left Engine
5838R Left Thrust Reverser - Right Engine
E. Procedure
S 424-028-C03
(1) Do these steps to install the probes (Fig. 402):
(a) Remove protective caps from the probes and the engine bosses.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù.
9 PROBE EGT SYSTEM (SOFT MOUNT) ú 77-21-01
ú CONFIG 3 ú C04 Page 411 ú Mar 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
(b)
Carefully install the probes in the engine bosses.
1) Install the lower probe, then the center probe, and then the upper probe.
(c)
Apply a thin layer of antiseize compound to the bolts that attach the probes.
(d)
ENGINES WITH EGT AIR DEFLECTORS;
Put the EGT air deflector on each probe.
(e)
Install the two bolts to attach each probe. 1) Tighten each bolt to 100-110 pound-inches (11.5-12.5 N.m). 2) Install a lockwire or a safety cable on each bolt.
S 434-179-C03
(2) Do these steps to attach the connector:
(a)
Remove protective caps from the connector and the receptacle.
(b)
Connect the connector (from the lower extension harness) to the left junction box. 1) Tighten the connector with the fork wrench to
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