Export Control
EAR Export Classification: Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3), except for the following Service Bulletins which are currently published as EAR Export Classification 9E991: SBE70-0992, SBE72-0483, SBE72-0580, SBE72-0588, SBE72-0640, SBE73-0209, SBE80-0024 and SBE80-0025.Copyright
© IAE International Aero Engines AG (2001, 2014 - 2021) The information contained in this document is the property of © IAE International Aero Engines AG and may not be copied or used for any purpose other than that for which it is supplied without the express written authority of © IAE International Aero Engines AG. (This does not preclude use by engine and aircraft operators for normal instructional, maintenance or overhaul purposes.).Applicability
PRE SBE 72-0366
Common Information
TASK 72-41-34-440-001-A00 HPC Variable Stator Vane Actuation System - Assemble The Front Bearing Housing To The Vane Actuating Crankshaft, Assembly-001 - Pre SBE 72-0366
General
Fig/item numbers in parentheses in the procedure agree with those used in the IPC. Only the primary Fig/item numbers are used. For the service bulletin alpha variants refer to the IPC.
For all parts identified in a different Chapter/Section/Subject, the applicable Chapter/Section/Subject comes before the Fig/item numbers.
This TASK gives the procedure to assemble the front bearing housing assembly on to the VSV crankshaft.
After assembly apply CoMat 07-038 AIR DRYING ENAMEL to any damaged surface protection, joint flange and attach parts. Use the correct color of the air drying enamel. Refer to the SPM TASK 70-63-02-400-501.
The number for each radial location must be identified in a clockwise direction. These start at the engine top position when you look from the rear of the engine unless stated differently in the procedure.
The Fits and Clearances, NEW PART DIMENSION and REJECT IF MORE THAN columns will be used by most operators. This permits the full use of the maximum wear allowance and reduction in the number of parts which are rejected, is possible.
The column WORN PART DIMENSIONS (Non-select) is included for operators who want to have full interchangeability. If this column is used an increase in the number of parts which are rejected is possible.
After the part has been in service for some time the REJECT IF MORE THAN and WORN PART DIMENSIONS could be changed. The operator must tell IAE and if agreed the manual will be changed.
The abbreviation Intf shows an interference or tight fit. This causes REJECT IF MORE THAN to become REJECT IF LESS THAN.
The abbreviation clear shows a clearance fit.
Preliminary Requirements
Pre-Conditions
NONESupport Equipment
| Name | Manufacturer | Part Number / Identification | Quantity | Remark |
|---|---|---|---|---|
| Protective gloves | LOCAL | Protective gloves |
Consumables, Materials and Expendables
| Name | Manufacturer | Part Number / Identification | Quantity | Remark |
|---|---|---|---|---|
| CoMat 07-038 AIR DRYING ENAMEL | k3504 | CoMat 07-038 |
Spares
NONESafety Requirements
NONEProcedure
Refer to Figure.
Calculate the clearance at location 1353. Use the data written as a note in TASK 72-41-34-200-000.
Table 1. Fits and Clearances (all dimensions are in inches) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
Non-select
REJECT IF
MORE THAN
LOCATION 1353
The Spherical Bearing HPC Variable Stator Vane Actuation System (72-41-34, 01-742)
Location On The Crankshaft HPC Variable Stator Vane Actuation System (72-41-34, 01-630)
Spherical Bearing Bore
2.4990
Intf
2.4997
0.0003
Crankshaft Diameter
2.5000
0.0014
2.5004
Table 2. Fits and Clearances (all dimensions are in millimeters) NEW PART
WORN PART
DIMENSIONS
DIMENSIONS
PART IDENT
Size
Clearance
Non-select
REJECT IF
MORE THAN
LOCATION 1353
The Spherical Bearing HPC Variable Stator Vane Actuation System (72-41-34, 01-742)
Location On The Crankshaft HPC Variable Stator Vane Actuation System (72-41-34, 01-630)
Spherical Bearing Bore
63.475
Intf
63.493
0.0076
Crankshaft Diameter
63.5006
0.0356
63.5106
SUBTASK 72-41-34-440-053 Make sure that the Fits and Clearances of the HP Compressor Assembly are in the Limits given at Location 1353
Refer to Figure
Heat the Front Bearing Housing Assembly HPC Variable Stator Vane Actuation System (72-41-34, 01-730) to a temperature of 302 deg F (150 deg C) in a suitable oven for 15 minutes.
WARNING
YOU MUST PUT ON THE CORRECT PROTECTIVE GLOVES BEFORE YOU REMOVE THE FRONT BEARING HOUSING ASSEMBLY FROM THE OVEN.
CAUTION
YOU MUST MAKE SURE THE FRONT BEARING HOUSING ASSEMBLY IS INSTALLED CORRECTLY ON TO THE VSV CRANKSHAFT.CAUTION
YOU MUST MAKE SURE THE FRONT BEARING HOUSING ASSEMBLY IS INSTALLED HARD AGAINST THE SHOULDER OF THE VSV CRANKSHAFT.Remove the Front Bearing Housing Assembly from the oven and install on to the VSV crankshaft HPC Variable Stator Vane Actuation System (72-41-34, 01-630).
Install the retaining ring HPC Variable Stator Vane Actuation System (72-41-34, 01-623).
SUBTASK 72-41-34-440-054 Install the Front Bearing Housing Assembly on to the VSV Crankshaft
Figure: Location for Fits and Clearances
Location for Fits and Clearances
Figure: Install the Front Bearing Housing Assembly
Install the Front Bearing Housing Assembly
