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 72-50-23-300-046 LPT Stage 4 Outer Shroud Seal Segment - Weld Cracks At The End Of The Segment, Repair-046 (VRS4420)
Material of component
PART IDENT | IAE SYMBOL | MATERIAL |
|---|---|---|
Stage 4 Shroud seal segment | MTS1096A or 2.4665.1/ Hastelloy X |
General
Price and availability - none
The practices and processes referred to in this procedure by the TASK number are in the SPM.
NOTE
NOTE
Preliminary Requirements
Pre-Conditions
NONESupport Equipment
NONEConsumables, Materials and Expendables
| Name | Manufacturer | Part Number / Identification | Quantity | Remark |
|---|---|---|---|---|
| CoMat 03-197 WELDING FILLER WIRE | LOCAL | CoMat 03-197 |
Spares
NONESafety Requirements
NONEProcedure
If crack goes through, V-groove to half weld up. After this, V-groove from other surface until weld seam as necessary. Weld other side as usual. Keep material removal to a minimum to remove cracks. Remove all braze material from the weld area. Refer to the SPM TASK 70-31-13-310-501 and Figure.
Completely V-groove the full length of the crack.
SUBTASK 72-50-23-320-068 Prepare the Surfaces before Welding
NOTE
If required remove the honeycomb and replace after welding repair, refer to Repair 4093 TASK 72-50-23-300-016, (REPAIR-016).Refer to the SPM TASK 70-31-13-310-501.
Clean the areas around the cracks on both sides of the segment.
SUBTASK 72-50-23-110-119 Clean the Stage 4 Shroud Seal Segments
Refer to the SPM TASK 70-31-13-310-501. Use CoMat 03-197 WELDING FILLER WIRE if necessary. For welding up through cracks refer to Step.
No heat treatment required after weld repair.
Tungsten inert gas weld the cracks on two sides of the segment.
SUBTASK 72-50-23-310-080 Weld Repair the Stage 4 Shroud Seal Segments
Make sure that the welds are applied correctly. Refer to the SPM TASK 70-31-13-310-501 and Figure.
Examine the welds.
SUBTASK 72-50-23-220-148 Examine the Welds
Refer to the SPM TASK 70-23-05-230-501. Use medium sensitivity level. No cracks are permitted.
Do the test for cracks.
SUBTASK 72-50-23-230-091 Do the Test for Cracks
Refer to TASK 72-50-23-200-003-B00 for limits.
Inspect the honeycomb seals of the segment for damage or unbonded areas.
Refer to Figure.
Inspect the stage 4 shroud seal segment dimensionally.
SUBTASK 72-50-23-220-149 Do the Post Repair Inspection
Figure: Dimensions for weld repair of the stage 4 shroud seal segment
Dimensions for weld repair of the stage 4 shroud seal segment
