TASK 72-31-00-990-501 Description and Operation of the LP Compressor (Fan) Module

DMC:V2500-A0-72-31-0000-00A-040A-B|Issue No:002.00|Issue Date:2013-11-01

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

All

Description

  1. TASK 72-31-00-990-501 Description and Operation of the LP Compressor (Fan) Module

    1. Description

      1. The LP compressor (LPC) fan module, refer to Figure, is a stage 1 fan rotor assembly. The rotor assembly includes 22 fan blades and a disk. The fan blades are of a wide-chord type without shrouds and they are attached to the disk by a dovetail at the bottom.

      2. 22 annulus fillers are installed between adjacent blades as a same platform between each two blades. This is because each blade has no structural platform. A rubber seal is bonded to each side of the annulus fillers to prevent air leakage between each blade and filler.

      3. The blades and fillers are held on the disk by a front blade retaining ring and a rear blade retaining ring with bolts.

    2. Operation

      1. The LPC fan compresses air which flows into the engine through the nacelle intake cowl. The larger part of the compressed air goes through the fan duct in the LPC - intermediate case module. It gives the primary part of the engine thrust. The smaller part of the compressed air goes through the LPC booster stages , where it is compressed again.

    3. Module Sub-Assemblies

      Listed below is the breakdown of sub-assemblies within the module:

      SNS

      Part

      Location

      LPC - Fan Module Nomenclature

      72-31-11

      LPC fan blades and fillers

      72-31-12

      LPC fan disk and locating ring

      72-31-13

      LPC fan blade retaining ring

    2. Figure: LP Compressor (LPC) Fan Module

    LP Compressor (LPC) Fan Module