Mag-Probe Test Keeps Boeing 767 from Being Grounded for Good

Boeing 767 Intermittent problem

On August 19, 2015 a problem occurred with one of the relays on a Boeing 767

Flight Idle and the Approach Idle control relay.   This problem was causing one of the Boeing 767 engines to run at different rpm’s when they were supposed to be running at the same rpm.   Aircraft Engineer Saemi was working with an Aircraft Electrical Specialist with the airline to solve this problem.  After they had changed thousands of dollars worth of parts the problem was still occurring.  Saemi decided to make a test on the relays while the engines were operational using a Bartol Mag-Probe.  What they found was one of the relays was intermittently loosing ground.  They replaced the relay and the aircraft is still flying as of the date of this post, October 23, 2015.  If the plane had been grounded permanently it would have cost the airlines (the price of purchasing a new Boeing $197,000,000.  When including the loss of the Grounded Boeing 767 the total cost to the airlines could have been over $400,000,000.




The following video is the voice of Aircraft Technician Saemi explaining how they used the Mag-Probe to solve the Boeing 767 Relay problem.


Below are emails from Saemi explaining how they found the problem.


Date: September 4, 2015 at 5:27:16 AM MDT

Hi Bob

Oh yes.. Boeing 767 Been flying around.  Idle disagree problem was solved 19 Aug.  I’ve been waiting for the problem to appear again. But so far so good.  If this happens again I will aim for Boeing 767 Relay K207 with the Mag Probe  🙂 This was a very costly defect as many parts where replaced. With the right troubleshooting steps I’m sure the parts that were replacement could have been reduced. The hardest part trouble shooting this problem was it was an intermittent problem.. The air idle problem was on engine 2.  Relay K207 was loosing ground intermittently.  Without using the Mag-Probe this would be hard to detect.

Regards from Amsterdam Saemi



Date: September 7, 2015 at 3:44:49 AM MDT

Dear Bob

Like I promised before that I will send a statement on how the Mag Probe was useful shooting a B 767 “”” Boeing 767-300 / Relay Intermittent Defect. Engine 2.    The Mag-Probe was a big help to solve an intermittent problem with one of the relays that controls the engine Flight Idle & Approach Idle on a Boeing 767-300.  With the Mag-Probe it was possible to see the relay was loosing power intermittently, that helped us to determine the fault. It reduced trouble shooting time and a component change was made as a result of the trouble shooting.

Saemi / Aircraft Engineer.



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About the Author
Bob Bartol has spent his whole life working with electronics in almost every capacity and spent many hours in Physics classes. He currently holds 4 U.S. patents and has been making a living off one of the patents "The Bartol Mag-Probe" for over twenty years. Bartol Research's Mag-Probe now has a global reach and is dramatically reducing trouble shooting downtime anywhere a solenoid valve. relay, or contactor is used. F111 Air Force Projects - European Flight Competition January 1968 Bob attended electronics school in the Air Force. Upon graduation he was assigned to a fighter wing in Germany. During his assignment he prepared seven aircraft for European competition. The fighter wings aircraft won the competition. Bob then returned to the United States and taught advanced radar for two years. Two years later, he returned to Europe. During this assignment, Air Force headquarters Europe selected Bob to open a Precision Measuring Equipment Laboratory (P.M.E.L) in England. It was the first of its kind in the Air Force. Upon his return to the United States, Air Force headquarters assigned Bob to Air Force research command in Florida. This was strictly a scientific assignment for research and development. After three years he moved from Eglin AFB in Florida to Edwards Air Force Base in California where he had direct contact with the National Bureau of Standards and supported research and development aircraft. During this assignment, he designed a modification for the TF X fighter (F-111). This modification made possible an additional 9800 flying hours per year. The F111 was the first swing wing aircraft in history. General Dynamics completed the modification prior to acceptance by the U.S. Air Force. Modification of F111 Aircraft General Dynamics March 1963 As a result of increasing this flying time Bob Received an award from Edwards Air Force Base for Increasing flying time of the F111 by 9,800 hours per year. The Award was Presented by Colonel Grumbles to TSGT Bob Bartol on June 17, 1963

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