Engine Titanium Consortium - Center for Nondestructive Evaluation ...

Original
Date
Revised
Date
Description
12/01 Complete combine Effects of Cleanliness Study
and Cleanability & Drying Studies and generate
matrix.
Status
Drying studies completed 6/01;
cleaning study complete 2/02
12/01 Initiate best practices document. Final report in progress. Draft to
FAA 7/02.
2/02 Complete best practices document and provide
recommendations for further study.
Final report to FAA in 7/02.
Milestone change summary from the Phase II Technical Proposal – Volume I, Task 2.2.3 dated July
10, 1998.
1.) The industry workshop, month 3 (May 2000) milestone was changed in the February 8 kick-off
meeting to a status update to the ATA September 12 meeting in San Francisco. It was felt that
a month 3 milestone could not provide any input that the OEM experts were not already aware
of and also that the subtask had nothing to communicate to the engine overhaul shops at the
time.
2.) The experimental design, month 3 (May 2000) milestone was set back one month to June to
review contaminates, determine cleaning methods and decide what cleaning methods would be
performed on which contaminate type. Until this was determined, the necessary crack samples
could not be determined and so this also was set back one month.
3.) The team decided that since the “Effect of Cleanliness Study” was very similar to the
Cleanability and Drying Studies, and would at least require crack samples called for in this
second study, that the studies be combined. The determination of how clean is clean must
include not just surface cleaning, but crack cleanliness also.
4.) Etching practices study will now be completed at the same time as the cleanability and drying
studies since the sample rendered unusable in the cleanliness study can be and will be used for
the etching practice study.
Deliverables:
Guidance on an optimal process for local etching practices.
Specimen sets as required.
Matrices which define the cleaning effectivity vs. typical engine run hardware contaminants,
detectability for various cleaning methods, and detectability for various drying methods.
Best Practices Document that provides guidance to the OEMs and airlines and will allow for any
necessary specification changes.
Recommendations for further work such as a formal POD study.
Metrics:
Improved cleaning and drying processes clearly defined for implementation by the industry as part
of FPI used in inspection of critical rotating hardware.
Quarterly Report – January 1, 2002 –March 31, 2002
print date/time: 6/6/2002 - 8:39 AM – Page 84