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3. Job Set-up
__________ Subtask 72-55-00-941-051
A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(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.
(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 72-55-00-010-051
B. Preparation for the replacement of LPT shaft plug O-rings
(1) Remove the spinner front cone.(Ref. TASK 72-21-00-000-005)
(2) Remove the spinner rear cone.(Ref. TASK 72-21-00-000-006)
4. Procedure
_________ Subtask 72-55-00-960-051
A. Replacement of LPT shaft plug O-rings
(Ref. Fig. 201/TASK 72-55-00-991-301)
(1) Remove retaining ring from forward end of LPT shaft, using a scriber.
(2) Remove LPT shaft plug (10) using the TBD (856A2668) or PULLER (856A2632).
(3) Remove and discard O-rings located in forward/aft grooves.
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(4) Remove the puller adapter from the LPT shaft plug (10). Install the LPT shaft plug (10) in the storage box.
CAUTION : MAKE SURE THAT YOU CORRECTLY INSTALL A NEW O-RING IN THE
_______ SEAL GROOVE AT THE FORWARD END OF THE LPT SHAFT PLUG. IF THE O-RING IS NOT CORRECTLY INSTALLED, DAMAGE TO THE ENGINE CAN OCCUR.
(5) Lightly coat new O-rings (40) (50) with engine oil (Material No. CP2442) and install into the seal grooves of LPT shaft.
(6) Install LPT shaft plug assembly into forward end of LPT shaft and onto center vent tube.
NOTE : Insert lug of LPT shaft in aligned slots of LPT coupling nut
____
and LPT shaft.
(7) Install retaining ring onto LPT shaft.
5. Close-up
________ Subtask 72-55-00-410-051
A. Install the Spinner Rear and Front Cone.
(1) Install the spinner rear cone.(Ref. TASK 72-21-00-400-006)
(2) Install the spinner front cone.(Ref. TASK 72-21-00-400-005)
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Low Pressure Turbine Shaft Assembly
Figure 201/TASK 72-55-00-991-301- 12 (SHEET 1)
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Low Pressure Turbine Shaft Assembly
Figure 201/TASK 72-55-00-991-301- 22 (SHEET 2)
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TURBINE FRAME ASSEMBLY - DESCRIPTION AND OPERATION
__________________________________________________
1. General
_______
**ON A/C 001-049, 052-099, 101-105, 151-154, 201-207,
(Ref. Fig. 001)
**ON A/C 051-051,
(Ref. Fig. 001A)
R **ON A/C 106-149, 155-199, 208-299, 301-399, 401-499,
(Ref. Fig. 001B)
**ON A/C ALL
The turbine frame module is the major structure assembly at the rear of the
engine. It supports the low pressure turbine (LPT) rotor rear section and
provides for engine rear mounting on the airframe.
The turbine frame consists of the following major parts :
- Turbine frame.
- No. 5 bearing support.
2. Description
___________
**ON A/C 001-049, 052-099, 101-105, 151-154, 201-207,
Post SB CFMI 72-0176
NOTE : This description is for Turbine Frame with Radial Struts only
____
A. Turbine Frame with Radial Struts (Ref. Fig. 002) The turbine frame assembly is made of nickel alloy and consists of a hub and a polygonal outer casing connected with radial struts. The external skin of the outer casing is lined with heat-insulation blankets. (Ref. Fig. 001)
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