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 72-32-25-300-008 No. 3 Bearing Face Seal - Restore The Chrome Plate In The Anti-Rotation Slots, Repair-008 (VRS3404)
General
Price and availability - refer to IAE
Preliminary Requirements
Pre-Conditions
NONEConsumables, Materials and Expendables
NONESpares
NONESafety Requirements
NONEProcedure
Refer to Figure.
Refer to the SPM TASK 70-33-02-330-501.
Remove the chrome plate by chemical.
Machine the slot sufficiently to permit a plating thickness of 0.0005 to 0.008 in. (0.013 to 0.203 mm) on each side after finish machining.
Remove the minimum amount of base material.
Refer to Figure.
Remove the chrome plate by machine.
SUBTASK 72-32-25-330-056 Remove the Chrome Plate by Chemical or by Machine from the Anti-Rotation Slots
NOTE
Carbon seal replacement is necessary after you complete the chrome plate repair. Masking the carbon is not permitted because it is possible that there will be contamination with the plating solution and the masking material.Refer to the SPM TASK 70-23-05-230-501.
Examine the area you machined for cracks.
SUBTASK 72-32-25-230-053 Examine the No. 3 Bearing Face Seal for Cracks
Refer to Figure.
Refer to the SPM TASK 70-33-02-330-501.
The plating thickness must be 0.0005 to 0.008 in. (0.013 to 0.203 mm) on each side after finish machining.
NOTE
No chrome plate is permitted outside the enclosed plate area.
Apply chrome plate to the anti-rotation slots.
SUBTASK 72-32-25-330-057 Apply Chrome Plate to the Anti-Rotation Slots of the No. 3 Bearing Face Seal
Refer to Figure.
SUBTASK 72-32-25-320-052 Machine the No. 3 Bearing Face Seal After Chrome Plate
Refer to Figure.
Refer to TASK 72-32-25-200-000 (INSPECTION/CHECK-000).
Examine the face seal after repair.
SUBTASK 72-32-25-220-095 Examine the No. 3 Bearing Face Seal After Repair
Refer to Repair 007, VRS3393 TASK 72-32-25-300-007 (REPAIR-007).
Replace the face seal (carbon detail).
SUBTASK 72-32-25-320-053 Replace the No. 3 Bearing Face Seal (Carbon Detail) After Repair
Figure: Repair Details and Dimensions
Sheet 1
Figure: Repair Details and Dimensions
Sheet 2
