April 2012
Welcome to The CTMA Connector, a monthly newsletter designed to provide news and ideas about the Commercial Technologies for Maintenance Activities (CTMA) program. The CTMA program is a joint Department of Defense/National Center for Manufacturing Sciences (DoD/NCMS) effort promoting collaborative technology development between industry and the DoD maintenance and repair facilities. This newsletter highlights ongoing projects, serves as a forum for promoting new project ideas, and provides other news of interest to the program. Our goal is to stimulate your participation and solicit your input. Feel free to submit items for the newsletter as well as any suggestions to make it more useful. More information about the program can be found at http://ctma.ncms.org/. To subscribe or unsubscribe to the CTMA Connector, send a message to:
listserv@listserv.ncms.org with “subscribe CTMANewsletter” or “unsubscribe CTMANewsletter” in the message body.
Following the 2012 CTMA Symposium, we announce the following Project Opportunities:
Product Life Cycle Management for Aircraft Sustainment and Support
The purpose of the project is to support the Sustainment Technologies for Aircraft Depot Maintenance configuration management of 3D design models for all modern aircraft and to leverage design re-use capabilities to reduce costs. In the current depot environment, engineering and production information is often insufficiently managed, and does not always incorporate knowledge of the true state of manufacturing or repair requirements. This state provides faulty baselines based on infeasible plans and, therefore, schedules, and provides skewed estimates of the resource requirements necessary to complete a given workload. With a Digital/Virtual Depot one can reduce cycle-times by using proven re-usable process for all maintenance and repair, along with simulating those work flow activities to optimize through-put. This would include resource models of shop layouts, equipment and capabilities of all Fleet Readiness Center facilities.
Based on the following reasons FRC SW was chosen for this project on behalf of the entire FRC
Command community:
- FRC SW extensive efforts in support of critical F/A-18 life extension efforts which
involves elaborate repair design and manufacture of complex CNC parts. - FRC SW extensive investment already made in Advanced Measurement Systems and
Reverse Engineering Lab environment and connected to RDT&E. - FRC SW development and utilization of the 3MS process for creating validated 3D
models from 2D blueprints for local manufactured items.
The explicit goal is to use this investment to leverage best practices and replicate a PLM Enterprise roll out later for all FRC’s and NAVAIR.
Interested participants should contact Dana Ellis, danae@ncms.org, (360)782-1370.
Achieving Optimal Test Application Migration
Depot repair activities throughout the Department of Defense (DoD) are dealing with the
obsolescence of automated test equipment on a mammoth scale. A large percentage of existing test hardware used to diagnose, repair and resupply failed weapons system components is in need of replacement due to inability to support and repair the test equipment itself. An even larger problem encountered with addressing the test hardware obsolescence is the need to retain the Non-Recurring Engineering (NRE) that is already sunk cost in test application software that resides on the obsolete equipment. The cost related to the NRE is orders of magnitude more than the test hardware itself and offers ample opportunities where technology can be injected to mitigate those related costs. Strategies for moving the existing test applications range from brute force application rewrites to attempting to use the same languages on the modern test platforms. All the strategies suffer from various test system nuances that have plagued the test industry for years, most of which are caused by the wide variance in computer to instrumentation communication and control scenarios that proliferate with provider and feature differentiation. Technologies that can provide a bridge from applications that are essentially locked to legacy hardware over to modern systems, using automated strategies, would provide cost savings in excess of the platform replacement costs themselves.
This project includes the injection of 2 more technological advancements to the ConVEx toolset. First a legacy to modern test resource pre-allocator functionality and second an automated straight wire Interface Test Adapter designer. With the deployment of ConVEx in several depot environments, there has been ongoing analysis as to where further efficiencies can be accomplished to better automate the ConVEx legacy to modern test application retarget process. The analysis is showing that a predominant amount of the ConVEx practitioner’s time is spent in a process referred to as allocation. Two kinds of allocation are accomplished in transferring legacy applications to modern systems. They are resource allocation and path allocation. Resource allocation is the process of assigning appropriate instrument capability that can accomplish each signal functionality required in a test definition. Path allocation is the process of defining the wires and switches in the test station and test adapter that are to provide the connections from the test station resources to the UUT connection locations that are specified in the test definition. It should be clear that the 2 types of allocation are somewhat mutually dependent. For instance if a resource that can do a certain job is allocated and it is found that a path to the UUT cannot be provided from that resource then a different resource might need to be allocated. So the automated allocation process is iterative between resource and path allocation in the current implementation. Current data shows that for typically complex test applications, ConVEx practitioners can produce new test applications from legacy applications for their new test platform targets in 6 to 8 man weeks. This is a striking difference from a typical test application rewrite that could take anywhere from 6 to 12 man months. The goal for the new technology insertion would be to reduce the transition process further down to 3 to 5 man weeks, which is roughly a 40% to 50% decrease from current nonrecurring engineering costs when ConVEx is used. Using very conservative figures this means approximately $50,000 in savings per test application. Depending upon the station and systems being transitioned there could be hundreds or thousands of test applications that are eventually transferred. That would mean overall cost savings from 10 to 100 million dollars that could be further mitigated when the technologies are implemented.
Interested participants should contact Jeff Walker, Jeffw@ncms.org (360)782-1370.
Engine Reliability Data Error and Cost Reductions Through IUID Technology
The USAF T56 engine Program Office has implemented Workscope Optimizing Tools since 2006. These tools recommend optimal repair workscopes based on the underlying reliability and cost of repair options. The success of the program in improving T56 reliability has been directly tied tothe quantity and quality of data collected at the depot and in the field through the use of the Maintenance In-Depth Maintenance Data Collection System (MIDCS) database within the USAF’s Data Repository Center (DRC). Valid reliability data has allowed for proper workscoping at the component level to optimize costs within each workscope.
The benefits from this implementation have been substantial. The USAF has enjoyed a 25% reliability improvement through the use of the workscoping tool. The development of Workscope Optimization Tools is data-intensive. Indeed, the removal times and observed failure modes of numerous engine parts must be manually collected, not only at the depot, but also at Intermediate Repair sites. Manual data collection creates two significant problems. First, it introduces error through the incorrect recordings that are transcribed and entered into government systems. Secondly, it is expensive. Not only are serial numbers written down, but they are subsequently key-punched into databases. The burden this places on field units is substantial and consequently, requests to track additional engine parts are often rejected by the field simply because the data recording process is so labor-intensive.
Under this project, the collection of engine component reliability data through IUID means will be piloted. Specifically, this project will:
- Pilot, and if necessary, simulate the use of IUID on engine parts to support the Workscope Optimization Tool development process.
- Measure the time savings associated with the use of IUID vs manual collection of engine data.
- Measure and compare the error rates of manually and IUID collected data sets. In this regard, the project will refer to previous work that baselined the errors in the reliability data sets.
- If appropriate, build a business case for the widespread adoption of IUID as a way to improve data quality and reduce the cost of data collection.
- This will be accomplished on engines that are using the workscoping tools currently within the AMC and AFSOC commands.
- IUID data will be downloaded directly into the USAF’s reliability MIDCS data base at each event. This will prevent the need for USAF personnel to document the component details at each removal event.
This process will set the path for tracking components relevant to engine reliability and cost without burdening maintainers resulting in further cost savings from current implementation efforts. The developed program may also be implemented by other engine programs to further improve their reliability data for subsequent analysis.
Interested participants should contact Debbie Lilu, debral@ncms.org, 734-995-7038.
DoD Airframe and Engine Fastener Removal – e-drill Cost Reduction and Process Improvement (e-CRPI)
Aerospace fastener removal is a labor-intensive process with high damage rates. The e-drill is an alternative to the standard mechanical drilling process. Low productivity, high damage rates, repetitive motion injuries, and the FOD associated with thousands of drill shards were common and accepted. E-drill technology dramatically improves aerospace fastener removal operations.
This project will produce a standard e-drill fastener removal specification package consisting of qualification test processes, test facilities, training specifications and training qualification tests, across all DoD aerospace platforms, including supervisor and operator training, field testing, and implementation support at seven major facilities including three Navy Fleet Readiness Centers (SW, E, S), all three Air Force Air Logistics Centers, and the Corpus Christi Army Depot.
By targeting e-drill testing on the fasteners with the highest removal cost (labor, consumables, damage, and ergonomics) while factoring in quantity of removals, the project will deliver the following benefits:
- 50% reduction in labor costs on the targeted applications.
- 75% reduction in airframe damage-related costs, which include MRB costs and replacement of parts that are damaged beyond repair from mechanical drilling of fasteners.
- Reduced ergonomic risk factors when compared to conventional fastener removal methods including force, posture, vibration, repetition, compression, duration, and noise.
- Reduced FOD – the only FOD left by the e-drill is the fastener head and stem – the metal that is removed from the fastener during the e-drill process is captured within a closed loop vacuum, filtered, and recycled through the system.
- Reduced Cycle Time and Improved Material Readiness – by speeding up the fastener removal
Interested participants should contact Bill Chenevert, billc@ncms.org, 734-995-7989.
Intermittent Fault Detection & Isolation System (IFDIS)
The Intermittent Fault Detection & Isolation System (IFDIS) is a tester that was specifically designed to fill the conventional ONE circuit at a time testing void. The IFDIS tests the LRU / WRA chassis wiring and identifies the precise location of each defect by monitoring ALL of the circuits in the Unit Under Test (UUT) individually, simultaneously and continuously (no scanning, sampling or multiplexing), detecting any intermittent event even as short at 50 nanoseconds (0.00000005 seconds). This quantum leap in test technology enables the chassis wiring problems to be easily repaired, as the root cause of the fault that drove the equipment item in for repair is accurately identified and isolated. Repairing the defect is usually trivial; finding the defect has always been, and continues to be, the problem. The proposed project is demonstrating that the IFDIS will efficiently and reliably detect and isolate the intermittent faults in the F-16 Weapon System Night Vision Data Transfer Unit (NVDTU). This will be accomplished by developing the needed hardware and software to continuously and simultaneously monitor ALL circuit paths in this Line Replaceable Unit chassis using the IFDIS, to detect and isolate to their precise location each intermittent circuit.
This project will demonstrate that by using the IFDIS, the intermittent faults in the NVDTU can be detected, isolated and repaired. As a result, the reliability of the NVDTU will be substantially increased, the cost of maintaining the NVDTU will be reduced, and currently “unrepairable” NVDTUs will be repaired. Additionally, the time required to repair NVDTUs will be reduced (based on experience with other IFDIS tested LRUs). Utilizing the limited IFDIS capability at OO-ALC to test the MLPRF has already yielded an 18 times return on investment by returning to service MLPRFs that had previously been considered “unrepairable,” and by more than doubling the MLPRF reliability.
One of the deliverables for this project is a testing specification for detecting intermittent faults.
Interested participants should contact Dana Ellis, danae@ncms.org, (360)782-1370.
Multibeam Laser Additive Manufacturing for Efficient Part Manufacture and Repair
The project team proposes the development of Multiple Beam Laser Additive Manufacturing technology to address the shortfalls of today’s technology and to significantly broaden the applicability in DoD’s maintenance tasks. Multibeam LAM deploys several low power beams, each precisely controllable and with a minimum heat input thus enabling high precision, fine features and excellent surface finish. The single beams either work in parallel to scale productivity without sacrificing precision or are superposed in a single spot creating material and application specific tailored heat profiles that will significantly expand the applicable material spectrum. Precise control of the heat cycle during material deposition will allow processing a wide spectrum of high-strength steels and super alloys used in jet engines and gas turbines and will also be advantageous for the deposition of gradient materials.
The innovative thrust areas of the proposed solution are:
- -High productivity, high precision LAM through the use of multiple medium power lasers
- Deposition of challenging materials, such as super alloys or gradient materials through optimized pre- and post heating by tailored spot geometries
- Real time process monitoring for consistent quality
- Easy to use, low cost system enabled by compact, low cost diode lasers integrated with the nozzle in a compact end effector.
Interested participants should contact Bill Chenevert, billc@ncms.org, 734-995-7989.
We appreciate your feedback. Please contact Chuck Ryan with suggestions or input on other topics that would be of interest to you in this newsletter. The CTMA Program is sponsored by the Department of Defense; the content of this newsletter does not necessarily reflect the position or policy of the government; no official endorsement should be inferred.
© 2012
