DMC:V2500-A0-72-45-1301-00A-649A-C|Issue No:002|Issue Date:2018-08-01

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 72-45-13-300-001 HPT Stage 1 Rotating Inner Air Seal - Blend Repair, Repair-001 (VRS3199)

Effectivity

FIG/ITEM	PART NO.
01-020	2A0884
01-020	2A1203
01-020	2A1352
01-020	2A3032
01-020	2A3069
01-020	2A3086
01-020	2A3109
01-020	2A0884-001
01-020	2A3424
01-020	2A3923

Material of component

PART IDENT	SYMBOL	MATERIAL
Stage 1 HPT air seal		Nickel alloy

Preliminary Requirements

Pre-Conditions

Action/Condition	Data Module/Technical Publication
Make sure that all the cleaning and inspection procedures are done before this repair.

Support Equipment

NONE

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

CAUTION

USE THIS PROCEDURE TO REPAIR THE DAMAGED AIR SEAL WHICH HAS NOT REACHED ITS LIFE CYCLE LIMIT. DO NOT REPAIR THE SEAL THAT HAS A CRACK OR INDICATION THAT IS NOT THE RESULT OF LOCAL DAMAGE SUCH AS DENTS, NICKS, SCRATCHES AND CORROSION PITS. IF YOU FIND CRACKS OR OTHER UNUSUAL CONDITIONS BY PENETRANT OR VISUAL INSPECTION YOU MUST REJECT THE PART.

Procedure

1. 1. Refer to Figure or Figure.
    All blends must be smooth and made in the shape of the initial contour. The minimum blend length to depth is 15 to 1.
    The maximum total blended away area on each knife-edge is 0.200 sqin. (129.0 sqmm).
    The maximum total blended away area on all knife-edges is 0.300 sqin. (194.0 sqmm).
    Blend to a sufficient depth to remove damage plus an additional 0.002 in. to 0.003 in. (0.05 mm to 0.08 mm) of material.
1. 1. Refer to Figure thru Figure.
    All blends must be smooth and made in the shape of the initial contour.
    The minimum blend length to depth is 15 to 1.
    All the finish marks must follow the lay of the initial tool marks.
    Repair all chamfers and radius to the requirements in the Figure thru Figure.
    The maximum local blending permitted on each side of the front diameter is 0.005 in. (0.13 mm).
    Blend to a sufficient depth to remove damage plus an additional 0.002 in. to 0.003 in. (0.05 mm to 0.08 mm) of a material.
    All dimensions apply when Surface K is flat by 0.002 in. (0.05 mm) and Diameter J maintains a clearance envelope of 8.636 in. (219.35 mm) diameter in free or held condition. Hold the seal only on Surfaces G and K and Diameter J.
    NOTE
    You can blend on each side of the front diameter if the flange thickness is not decreased to less than 0.074 in. (1.88 mm).
    You can machine each side of the front diameter to remove a large quantity of damage if the flange thickness is not decreased to less than 0.074 in. (1.88 mm).
2. 1. Refer to Figure thru Figure.
    All blends must be smooth and made in the shape of the initial contour.
    All the finish marks must follow the lay of the initial tool marks.
    The minimum blend length to depth is 15 to 1.
    The maximum blend depth is 0.007 in. (0.18 mm).
    The maximum blend length is 0.500 in. (12.70 mm) in a circumferential direction.
    The minimum distance between blended areas is 2.00 in. (50.8 mm).
    Blend to a sufficient depth to remove damage plus an additional 0.002 in. to 0.003 in. (0.05 mm to 0.08 mm) of material.
3. 1. Refer to Figure thru Figure and Figure thru Figure.
    For PN 2A1352, no blending of holes is permitted.
    Damage up to 0.001 in. (0.03 mm) in depth is permitted.
    All blends must be smooth and made to the initial contour in all directions.
    All the finish marks must follow the lay of the initial tool marks.
    The minimum blend length to depth is 15 to 1.
    The maximum blend depth is 0.005 in. (0.13 mm).
    Blend to a sufficient depth to remove damage plus an additional 0.002 in to 0.003 in. (0.05 mm to 0.08 mm) of material.
    If the damage or blend goes through the hole edge, repair the hole edge radius by the procedure given in SPM TASK 70-33-19-350-501.
4. 1. Refer to Figure thru Figure.
    All blends must be smooth and made to the initial contour in all directions.
    All the finish marks must follow the lay of the initial tool marks.
    The minimum blend length to depth is 15 to 1.
    The maximum blend depth is 0.007 in. (0.18 mm).
    Blend to a sufficient depth to remove damage plus an additional 0.002 in. to 0.003 in. (0.05 mm to 0.08 mm) of material.
1. 1. Refer to Figure, Figure, Figure and Figure thru Figure.
1. Install the HPT Stage 1 Rotating Inner Air Seal into the fixture. Use appropriate fixture.
2. Constraint contact permitted only on Surface G, Surface K and Diameter J.
3. Turn the HPT Stage 1 Rotating Inner Air Seal at 900 rpm.
4. Record amount of unbalance in oz-in.
5. Remove prior unbalance marking. Make a mark for amount and location of unbalance per TASK 70-09-00-400-501, procedures to make permanent identification and location marks. Use shallow electrolytic etch.
6. Refer to Figure thru Figure.