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
Common Information
TASK 72-42-20-100-122 No. 4 Bearing Scavenge Oil Tube - Clean, Cleaning-021
Effectivity
FIG/ITEM | PART NO. |
02-020 | 2A1949-01 |
02-020 | 2A2028-001 |
02-020 | 2A2074-01 |
02-020 | 2A4379-01 |
02-020 | 2A2274-01 |
General
This TASK gives the procedure to clean the No.4 bearing scavenge tube. For the other parts of the No. 4 bearing compartment tubes, refer to Cleaning-000 TASK 72-42-20-100-100.
The practices and processes referred to in the procedure by the TASK numbers are in the SPM.
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.
Reference
Refer to SPM TASK 70-10-00-100-501, Cleaning - General information.
Preliminary Requirements
Pre-Conditions
NONESupport Equipment
NONEConsumables, Materials and Expendables
NONESpares
NONESafety Requirements
NONEProcedure
Cleaning of Components (long soak, for cobalt and nickel base alloys and heat and corrosion resistant steels).
You can flush the inside of the tube with a solution given in SPM TASK 70-11-13-300-503.
Do not put the tube fully into the solution.
Remove unwanted particles. Refer to SPM TASK 70-11-13-300-503.
SUBTASK 72-42-20-110-198 Remove Unwanted Particles
Moderate Cleaning
Clean the outside of the tube only.
Remove unwanted particles. Refer to SPM TASK 70-11-03-300-503.
SUBTASK 72-42-20-110-199 Remove Unwanted Particles
Solvent Cleaning (titanium and all other metals).
Clean the outside of the tube only.
Remove the grease and unwanted particles. Refer to SPM TASK 70-11-26-300-503.
SUBTASK 72-42-20-110-200 Remove the Grease and Unwanted Particles