1) Tighten the manifold nut to 135-150 pound-inches (15.3-17.0 newton-meters).
(e)
Install lockwire or the optional safety cable and ferrule to the manifold nut and the bolts that attach the EGT probe to the turbine exhaust case.
(f)
Tighten the clamp bolts for the pressure manifold to 36-40 pound-inches (4.1-4.5 newton-meters).
(g)
Install the probe wires to the bracket on the pressure manifold with the clamp, nuts and bolts. 1) Lubricate the threads of the bolts with the Silver Goop. 2) Tighten the bolts to 36-40 pound-inches
(4.1-4.5 newton-meters).
S 434-029-N00
(4) Do the steps that follow to install the EGT probe at the 4 o'clock
position:
(a) Install the EGT probe into the EPR probe and align the holes for the bolts.
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(b)
Align the bracket and install the bolts. 1) Lubricate the threads of the bolts with the Silver Goop. 2) Tighten the bolts to 54-60 pound-inches
(6.1-6.8 newton-meters).
(c)
Install the clamps for the EGT probe cable on the bracket with bolts and nuts. 1) Tighten the bolts to 36-40 pound-inches
(4.1-4.5 newton-meters).
CAUTION: DO NOT USE LUBRICANTS ON THE EEC SENSE TUBES, ADAPTERS, OR
_______
PACKINGS. IF YOU USE LUBRICANTS ON THESE PARTS,
CONTAMINATION OF THE EEC CAN OCCUR.
(d)
Connect the pressure manifold to the probe adapter.
1) Tighten the manifold nut to 135-150 pound-inches (15.3-17.0 newton-meters).
(e)
Install lockwire or the optional safety cable and ferrule to the manifold nut and the bolts that attach the EGT probe to the turbine exhaust case.
(f)
Install the probe wires to the bracket on the pressure manifold with a clamp and a bolt. 1) Lubricate the threads of the bolt with the Silver Goop. 2) Tighten the bolt to 36-40 pound-inches
(4.1-4.5 newton-meters).
S 434-031-N00
CAUTION: DO NOT TIGHTEN THE NUTS THAT ATTACH THE PROBE WIRES TO MORE
_______ THAN THE SPECIFIED TORQUE. TOO MUCH TORQUE ON THE EGT PROBE NUTS CAN LOOSEN OR CAUSE DAMAGE TO THE EGT PROBE STUDS.
(5) Connect the probe wires to the EGT probe.
NOTE:____The EGT probe has two types of studs. One stud has a larger diameter and is made of alumel. The other stud has a smaller diameter and is made of chromel. The stainless steel nuts that attach the probe wires to the studs have different dimensions, thus they are not interchangeable.
(a) Install the lockwashers and nuts. 1) Tighten the nuts on the alumel studs (the larger nuts) to 18-22 pound-inches (2.0-2.5 newton-meters).
2) Tighten the nuts on the chromel studs (the smaller nuts) to 15-18 pound-inches (1.7-2.0 newton-meters).
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
3) After you tighten the nuts, make sure the adjacent ends of the cable do not touch.
a) Make sure the ends of the cable do not touch the lockwire or the bolt heads in the area.
S 794-033-N00
(6) Do this task: Do a Leak Test of the Engine Pressure Ratio (EPR) PT4.95 Probe System (AMM 77-11-01/501).
S 714-027-N00
(7) Close the core cowl panels (AMM 71-11-06/201).
S 864-041-N00
(8) For the applicable engine, close this circuit breaker on the main power distribution panel, P6, and remove the DO-NOT-CLOSE tag: (a) 6G15 SCU ALT PWR ENG 1 (b) 6G23 ENG SCU 1 (c) 6G16 SCU ALT PWR ENG 2 (d) 6G24 ENG SCU 2 (e) 6G17 SCU ALT PWR ENG 3 (f) 6G25 ENG SCU 3 (g) 6G18 SCU ALT PWR ENG 4 (h) 6G26 ENG SCU 4
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本文链接地址：747-400 AMM 飞机维护手册 发动机指示 ENGINE INDICATING(10)
