Half Moon Bay, CA 94019
Phone: (650)726-5623
Mobile: (650)245-1144
Email: mikefahey@comcast.net


“Engineering Specialist” with particular focus on development which includes but is not limited to Machine Tool or Process Apparatus upgrade or original design. This may require special hardware(especially electronics), software (PCs, PLCs, PLDs, etc.), test apparatus, special tools, procedures, policies, etc.

Technical Skills

Educated and experienced in various aspects of electronics, software, and mechanical designs. This includes Original Printed Circuit Board Design.

Experienced with various Software compilers/assemblers and firmware development tools. Typical project documentation is accomplished via Autocad (including solid modeling), Excel, Word, Place(or similar PLD tool), and other appropriate applications.

Programmed a wide range of PLCs (Programmable Logic Controllers) including: Cutler-Hammer, GE, Idec, Automation Direct, etc.

Developed hardware & software for various communication protocols e.g., IEEE488, RS232, RS422, and RS485.


DOS C/C++, Java, HTML, Windows C/C++, WindowsCE C/C++

Operating Systems:

WindowsCE, Windows95, Windows98, Windows 3.1, PC/MS DOS


IBM-compatible PCs, WinCE PDAs, STD Bus, S100 Bus, Commodore 64, Commodore PET

Work Experience

2002 – present       Freelance Consulting

1985 – 2002       United Airlines MOC, SF Int’l Airport

Staff Maintenance Specialist(Electronics)

1975 – 1985          United Airlines MOC, SF Int’l Airport

Maintenance Specialist(Electronics)

02/1968 – 1975       United Airlines MOC, SF Int’l Airport

IAM Mechanic (Electronics)

Awards Received

Original Designs:

  1. 1973 - 1976, Pulsed Arc Welding Apparatus (see attached patent)
    Patented apparatus (PN=3,989,922) that was a forerunner to the pulsed welding feature on modern TIG & Plasma welding processes. This attachment to existing TIG & Plasma welders enabled repairs of certain engine cases and other titanium parts resulting in a minimum savings, for UAL, of $160,000 in the first year it was used. It was used more or less continuously for 10 years until it was displaced by more modern OEM equipment.
  2. 1978-1980, Liquid Flow and Miscellaneous Parameter Calibration System for Engine Component Test Stands
    This incorporated a Commodore PET computer and some OEM Instruments to enable calibrations of the test stand gauges while still installed in the Test Stands.
  3. 1978-1983, Electronic Accuracy Compensation Circuitry for NC Machine Tools
    This predated the compensation feature now provided by nearly all control vendors. Installing the electronic compensation circuitry in the control of an “out of spec” rotary table yielded performance exceeding OEM specs. This permitted deferral of purchase of a new rotary table for about 9 years. The value of this 6-week design effort was, by the machine shop’s estimate, greater than $150,000.

    Accuracy of linear axes on other NC equipment was also improved. On a Burgmaster Bridge Mill, with this feature installed, accuracy was improved enough so that special fixtures could be reliably manufactured on the machine. This produced more $$ and time savings.
  4. 1985-1987, Programmable Liquid Flow Metering System for Jet Engine Test Stands.

    With my design and implementation of this system, UAL was able to bring engine nozzle testing in-house (previously outsourced to Garret Air Research) resulting in $$ & time savings. I received a Special Recognition Award for this.
  5. 1995-2002, Programmable Multi-Purpose Jet Engine Component Test Console
    This multipurpose tool for testing/certifying engine components such as SVAs (Stator Vane Actuators), AOHEVs (Air Oil Heat Exchanger Valves), and many other engine component types was part of the 1995 Division ROI award.

    It is configurable so that new parts can be easily added to its database of qualified items. Cost to manufacture is approximately $50,000 (as opposed to cost to purchase an OEM unit for more than $150,000). In addition to the Component Test Console’s greater versatility, certain evaluations suggest that it is more accurate than the OEM units, i.e. it meets or exceeds the OEM requirements.
  6. Other accomplishments on request.

Equipment/Design Modifications:

  1. 1969-1971, Balancing Machine Electronics Redesign
    To achieve the redesign necessary to address machine reliability issues, I “transistorized” the vacuum tube technology within the original Gisholt equipment. I designed and manufactured printed circuit boards to accomplish this.

    The result was essentially zero downtime and improved process accuracy during the 1970s. This was a modest $$ savings in terms of reduced maintenance costs, but the real benefit was in cycle time reductions (due to the reduced down time) when balancing engine parts.
  2. 1980-1982, AMS (Asset Management System) Mark V Computer Modifications
    When Alton Technology (a contractor) went bankrupt during installation of UAL’s first generation Asset Management System (which includes keycard entry to the MOC), SFOMP Ron Brooks (another maintenance specialist) and SFOMP Jim Trainor (the Plant Maintenance Manager) requested that I evaluate the issues and assist in saving the project. This was a $1,600,000 project and had zero reliability and zero component interchangability (as left by the contractor).

    I re-manufactured three PDP11/03-based DEC Computers and made many other system improvements of an electrical/electronic nature. Within a year our efforts literally saved the project.
  3. 1995-1996, High Speed Grinder Enhancements (Electrical, Mechanical, and Software)
    When the machine shop was contemplating buying a new high speed grinder, I was asked for my opinion. I decided that improvements to the Dorries were possible, would be less expensive, and could deliver needed functionality sooner.

    I suggested and directed certain mechanical improvements and created software that took advantage of those mechanical improvements. This resulted in the Dorries Grinder performing much better (+/- 0.0005”) than its original specifications. The improved accuracy was sufficient to meet the P&W spec for the PW40xx rotors (+/- 0.001”).

    As a consequence, no OSV grinds of PW40xx rotors since 1995 have been required. This accounts for more than 300 PW40xx rotors ground in-house as well as quality improvements for all other rotor types. At an estimated OSV charge (including shipping) of $20,000/rotor, these changes have yielded savings (not counting cycle times), since 1995, exceeding $8M (this includes a one time first year savings of about $2M, estimate by SFOEP). Cycle times have been reduced from a minimum of 3 weeks to 1 day.
  4. Other accomplishments on request.
Education & Qualifications
1968 – 1970 College Of San Mateo San Mateo, CA
AA in Electronics Technology, Dean’s Honor List    GPA,Units=3.91,78
1972 - 1997  College of San MateoSan Mateo, CA
Continuing Education    GPA,Units=3.59,27
Math 30Elem Calculus A, 5
Math 31Calculus   B, 5
CIS 360Digital Systems (uP Design)   B, 3
CIS 115Program Design (Pascal)   A, 3
ELEC 215PC Hardware/Troubleshooting   A, 2
CIS 270,1Object Oriented Programming (C++)   B, 3
CIS 290,1Micro Computer Assembly Language   A, 3
CIS 374,5Java Programming   A, 3

1968 FCC General Class Radio Telephone License

1985 California Electrical Contractors License (C10-454326)

Industry Training & Schools
  General Electric Numerical Control Theory & Troubleshooting
  Reliance Electric  Computer Controlled Test Stand Theory & Troubleshooting
  Charmilles (Switzerland) EDM (Electric Discharge Machining) Theory &Troubleshooting
  Bendix (Detroit)  Bendix CNC Theory & Troubleshooting
  Cincinnati Milacron 950 CNC Theory & Troubleshooting
  LeBlond Makino  VMC Theory & Troubleshooting
  Giddings & Lewis VTL Theory & Troubleshooting
  Dorries GmbH (Germany) High Speed Grinder Theory & Troubleshooting
  Flow Dynamics Measurement Uncertainty Theory & Application
  Pratt & Whitney Measurement Uncertainty Theory & Application
      by Ronald Dieck, ISA Author & Contributor