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
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Common Information
TASK 72-61-49-300-001 Gearbox Breather Outlet Oil Duct - Repair A Bent Clamping Ring, Repair-001 (VRS2998)
General
This repair can be done to the clamping ring attached to the gearbox breather duct. It can be done during engine overhaul.
Price and availability - none.
The practices and processes referred to in the procedures by the TASK numbers are in the Standard Practices Manual (SPM).
A backing-block must be locally manufactured from a square piece of stainless steel block. One face of the backing-block must be smooth and flat and must have no burrs.
If the clamping ring has been repaired before, do not do this repair.
Preliminary Requirements
Pre-Conditions
NONESupport Equipment
| Name | Manufacturer | Part Number / Identification | Quantity | Remark |
|---|---|---|---|---|
| Straight edge | LOCAL | Straight edge | ||
| Nylon mallet | LOCAL | Nylon mallet |
Consumables, Materials and Expendables
NONESpares
NONESafety Requirements
NONEProcedure
Refer to Figure.
Refer to Figure and change the shape of the clamping ring to the correct shape.
Use the backing block. Put the face of the backing-block against the clamping ring. Make sure that this face of the backing-block is smooth and flat and has no burrs.
Use the Nylon mallet.
Use no more force than is necessary to change the shape of the clamping ring. If the clamping ring must be moved through more than 5 degrees during the repair, discard the clamping ring.
CAUTION
MAKE SURE THAT THERE ARE NO BURRS OR SHARP EDGES ON THE BACKING BLOCK. MAKE SURE THAT THERE ARE NO UNWANTED PARTICLES, DIRT OR GRIT ON THE BACKING-BLOCK OR ON THE CLAMPING RING. THESE COULD CAUSE SCRATCHES OR CRACKS DURING THE REPAIR.Repair the clamping ring.
SUBTASK 72-61-49-350-051 Repair the Clamping Ring
Refer to Figure.
Refer to Figure and make sure that these parts are straight.
Use the Straight edge.
The ring must be 90 degrees to the axis of the gearbox breather duct all around the circumference of the duct.
Examine the straight parts of the clamping ring.
SUBTASK 72-61-49-210-051 Examine the Shape of the Clamping Ring
Refer to SPM TASK 70-23-05-230-501.
Do a dye penetrant test on the clamping ring.
SUBTASK 72-61-49-230-051 Examine the Repaired Clamping Ring
Refer to SPM TASK 70-09-00-400-501 and use the electro-etch method.
Mark the repair scheme number VRS2998 on the clamping ring adjacent to the repair area.
SUBTASK 72-61-49-350-052 Put the Repair Scheme Number on the Clamping Ring
Figure: Clamping Ring Repair - Dimensions
Clamping Ring Repair - Dimensions
