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 70-28-02-280-501 "Residual Fluoride, Chloride or Sodium Ions In Cavities Of Blades Or Vanes Recoated With PWA 73 Aluminium - Silicon Coating"
Safety Precautions
General
After a layer of PWA 73 has been reapplied, cavities of blades or vanes must be tested for contamination of fluoride, chloride, or sodium.
Test procedures
After diffusion heat treatment, clean recoated blades or vanes by blasting with dry air to remove loose fill material, then power hot water flush.
Seal passageway exists of blade or vane with rubberized tape, or confine with a tight rubber seal.
Fill cavity with distilled water heated to 180 deg F (82 deg C) and permitted to stay for 30 minutes.
Move water from cavity into a vessel with graduations, flush at least three times with distilled water, add to vessel, and add to 20 ml.
Make an analysis of each ion, prepare two standard solutions that are different by a factor of approximately ten, such that the concentration of the sample lies between those of the two standards.
Fill the one ion electrode with its specific reference filling solution, and put in electrode holder.
Adjust pointer to center scale by the use of the zero adjustment screw, with function switch off.
Put the electrode into standard solution of higher concentration and twist carefully.
Set function switch to univalent ion position for chloride or fluoride analyses and to univalent positively charged ion position for sodium analysis and, after 20 seconds, adjust meter deflection to center scale with calibration control.
Remove electrode, flush, and wipe dry.
Insert electrode into solution from blade or vane cavity, twist carefully, and, after 20 seconds, record meter indication in micrograms per milliliter.
Calculation
Multiply meter value by number of milliliters of solution.
Acceptance standards
Total fluoride - 15 micrograms maximum
Total chloride - 100 micrograms maximum
Total sodium - 100 micrograms maximum
NOTE
NOTE
NOTE
Preliminary Requirements
Pre-Conditions
NONESupport Equipment
| Name | Manufacturer | Part Number / Identification | Quantity | Remark |
|---|---|---|---|---|
| Specific-ion meter | LOCAL | Specific-ion meter | Orion model 407, or equivalent | |
| Combination fluoride electrode | LOCAL | Combination fluoride electrode | Orion model 96-09, or equivalent | |
| Combination chloride electrode | LOCAL | Combination chloride electrode | Orion model 96-17, or equivalent | |
| Combination sodium electrode | LOCAL | Combination sodium electrode | Orion model 96-11, or equivalent |
Consumables, Materials and Expendables
| Name | Manufacturer | Part Number / Identification | Quantity | Remark |
|---|---|---|---|---|
| CoMat 01-201 DISTILLED, DEIONIZED, DEMINERALIZED, OR REVERSE OSMOSIS (RO) WATER | LOCAL | CoMat 01-201 |
Spares
NONESafety Requirements
