Engine Titanium Consortium - Center for Nondestructive Evaluation ...

Task 2:
Task 2.2
Subtask 2.2.2:
Inservice Inspection
Inspection Development
Transitions to Airline
Maintenance
High Speed Bolthole Eddy
Current Scanning
Team Members:
HW: Tim Duffy, Jim Ohm, Waled Hassan
ISU: Lisa Brasche
GE: Tony Mellors, Shridhar Nath, Jon
Bartos
PW: Kevin Smith, Dave Bryson, Rob
Stephan
Students: None
Program initiation date: June 15, 1999
Objectives:
To develop common fixtures to reduce inspection variables and arrive at a standardized inspection
technique.
To measure the process capability.
To utilize this information to develop an industry best practice document.
Approach:
Evaluation of Existing Processes: Efforts will concentrate on process improvements for and
standardization of high speed bolt hole scanning. A detailed evaluation of existing OEM inspection
processes and needs will be conducted. Current equipment and tooling will be analyzed to provide
a baseline of existing inspection processes and their limitations. The data will be analyzed for
potential process improvements and identification of common tooling approaches. A survey of
available commercial tooling will be included as part of the assessment and included in the baseline
as possible.
Development of Common Tooling: The efforts will then be focused on the detailed design and
fabrication of common tooling with an emphasis placed on variability reduction and defect
detectability improvements. An inspection demonstration will be conducted on a sample set of
hardware from each of the industrial members for validation of process development. A
comparison to the baseline data will be made. Working with task 3.1.3 an evaluation of the process
POD will be conducted on existing bolt hole reliability specimens.
Development of Common Process: A common inspection technique and best practices document
will be developed. Currently AS4787, Eddy Current Inspection of Circular Holes in Nonferrous
Metallic Aircraft Engine Hardware, serves as a standard for hole inspection. This document will be
revised to reflect the results of the ETC effort. Recommendations for equipment improvements will
be supplied to vendors and implications for further study will be provided to the FAA.
Quarterly Report – January 1, 2002 –March 31, 2002
print date/time: 6/6/2002 - 8:39 AM – Page 71