DMC:V2500-A0-72-44-5001-00A-652A-C|Issue No:001|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

Common Information

TASK 72-44-50-300-010 HPT Stage 1 Cooling (TOBI) Duct - Repair to Adjust The Air Flow, Repair-010 (VRS3177)

Effectivity

FIG/ITEM	PART NO.
01-010	2A0008-01
01-010	2A1997-01
01-010	2A1997-001
01-010	2A1997-002
01-010	2A1997-003
01-010	2A2141-01
01-010	2A3180-01
01-010	2A3329-01
01-010	2A3487-01
01-010	2A3487-001
01-010	2A3491-01
01-010	2A3914-01
01-010	2A3914-001
01-010	2A4086

Material of component

PART IDENT	SYMBOL	MATERIAL
Stage 1 HPT cooling (TOBI) duct assembly	-	Nickel alloy

General

Price and availability - refer to IAE

The practices and processes referred to in the procedure by the TASK numbers are in the SPM.

NOTE

To identify the consumable materials refer to the PCI.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

Name	Manufacturer	Part Number / Identification	Quantity	Remark
CoMat 03-287 WELDING FILLER WIRE	LOCAL	CoMat 03-287

Spares

NONE

Safety Requirements

NONE

Procedure

1. Refer to Figure, Figure, Figure, Figure, Figure, Figure, Figure, Figure or Figure.
2. 1. Holes in the plugs can be welded or new plugs can be added as long as the total number of plugs is not more than the limits given in Figure, Figure or Figure.
  2. Use CoMat 03-287 WELDING FILLER WIRE.
  3. Refer to the SPM TASK 70-31-13-310-501.
  4. It is not necessary to heat treat the weld.
  5. Hardness requirements are waived in the weld zone.
  6. Figure, Figure, Figure, Figure and Figure gives the procedure to find the approximate flow changes when you add one nozzle plug.
1. NOTE
  Do one or more of the steps that follow to increase the air flow.
  Refer to Figure, Figure, Figure, Figure, Figure, Figure, Figure, Figure, Figure, Figure, Figure and Figure.
2. 1. Refer to Figure, Figure, Figure, Figure, Figure and Figure for the flow changes when you add a hole.
  2. Refer to Figure for the limits when you drill the trim holes.
3. 1. Refer to Figure, Figure, Figure, Figure, Figure and Figure for the flow changes when you remove one nozzle plug.
  2. Refer to Figure and Figure for the limits when you remove the plug welds.
  3. Maintain the surface finish and break all edges 0.003 in. to 0.015 in. (0.076 to 0.381 mm).
  4. Make sure that the remaining plugs are as equally distributed around the circumference as possible.
4. 1. Refer to Figure, Figure, Figure, Figure, Figure and Figure for the flow changes when you add or plug one hole.
  2. New plugs can be added as long as the total number of plugs is not more than the limits given in Figure, Figure or Figure.
  3. Do not add a new plug and then remove it to increase the air flow.
  4. Use CoMat 03-287 WELDING FILLER WIRE.
  5. Refer to the SPM TASK 70-31-13-310-501.
  6. It is not necessary to heat treat the weld.
  7. Hardness requirements are waived in the weld zone.
  8. Refer to Figure, Figure, Figure, Figure, Figure and Figure for the limits when you drill the trim holes.
1. 1. Refer to TASK 72-44-50-200-001-A00 (INSPECTION-001, CONFIG-001), TASK 72-44-50-200-001-B00 (INSPECTION-001, CONFIG-002), TASK 72-44-50-200-001-C00 (INSPECTION-001, CONFIG-003), TASK 72-44-50-200-001-D00 (INSPECTION-001, CONFIG-004), TASK 72-44-50-200-001-E00 (INSPECTION-001, CONFIG-005) or TASK 72-44-50-200-001-F00 (INSPECTION-001, CONFIG-006).