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 72-60-33-300-001 PMA Drive Gear - Blend Repair, Repair-001 (VRS5174)
General
Price and availability - none
The practices and processes referred to in the procedure by the TASK numbers are in the SPM.
NOTE
Preliminary Requirements
Pre-Conditions
NONESupport Equipment
NONEConsumables, Materials and Expendables
| Name | Manufacturer | Part Number / Identification | Quantity | Remark |
|---|---|---|---|---|
| CoMat 02-140 TRIANGULAR INDIA STONE, FINE GRIT | LOCAL | CoMat 02-140 |
Spares
NONESafety Requirements
NONEProcedure
Refer to Figure.
Refer to the SPM TASK 70-35-03-300-501.
The maximum permitted depth of the blending in the spline and in the gear is 0.0014 in. (0.025 mm).
The maximum permitted damaged area of each tooth is 10 percent of the engagement surface.
It is not necessary to polish the repaired surfaces.
Blend the engagement surfaces of the spline teeth and gear teeth at location 1 and 2.
Refer to the SPM TASK 70-35-03-300-501.
The maximum number of nicks permitted is 3 per tooth, 0.040 in. (1.020 mm) long, and each nick must not extend more than 0.020 in. (0.51 mm) onto the engagement surface.
The maximum permitted depth of blended nicks is 0.010 in. (0.25 mm).
The minimum distance between the nicks must be equal to or more than the longest nick.
Blend the gear tooth tip and tooth side at locations 3 and 4.
Refer to TASK 70-35-03-300-501.
The maximum number of nicks permitted is 3 per tooth, 0.040 in. (1.02 mm) long, and each nick must not extend more than 0.020 in. (0.51 mm) onto the engagement surface.
The maximum permitted depth of blended nicks is 0.004 in. (0.10 mm).
The minimum distance between the nicks must be equal or more than the longest nick.
Blend the spline tooth tip at location 1.
SUBTASK 72-60-33-350-062 Blend Repair the PMA Drive Gear (01-120) Surfaces
Figure: Repair details and dimensions
Repair details and dimensions
