Email inquiries to: accreditation@easa.com

No, there is only one type or level of accreditation.

Yes.

Note: Many, if not most, new instruments do not have a certificate of calibration unless the purchaser requests it.

Additional information regarding equipment calibration.

Some service centers don’t calibrate inside micrometers because they put an inside micrometer in the bore and set it, then slide it out and use a calibrated outside micrometer to measure the inside micrometer. Is this an acceptable practice? If so, do the inside micrometers need to be calibrated?

Using the inside micrometers as gauges, and performing the actual measurements with outside micrometers is an acceptable practice. The inside micrometers should be identified as “for reference only”; and the outside micrometers must be calibrated.

Additional information regarding equipment calibration.

Where do we stand on calibration if we have a calibration unit that conforms to NIST and kept up. Can we calibrate our own meters?

A service center performing in-house calibration must have a procedure for calibration, and in general the instrument used to calibrate other instruments must have an accuracy at least 4 times greater than the device being calibrated.

Additional information regarding equipment calibration.

All.

The QR code is a link to the accreditation program information on the EASA website.

The visual inspection criterion does not require dismantling of the bearing. The Checklist explanation includes the following statement: It is not a requirement that ball and roller bearings be dissected to determine the apparent failure mode. However, the apparent mode of failure is to be recorded for sleeve bearings.

The scope states that the program applies to three-phase squirrel-cage motors [only]. Further the scope does not restrict it to any voltage rating. That is, low and medium voltage three-phase squirrel-cage motor ratings are both included.

The primary judgment criteria for making this determination are the results of the tests, and observation of the winding.  The key test is the no load test, with the no load current being the primary indicator of acceptability.  The winding data is judged acceptable if the no load current is within a reasonable range (See Checklist item #18 No-load tests.)  Also, by observation if the slot fill is normal, that is, not low, the wire area per amp should be acceptable.  If both the test and observation criteria are met, the winding can be judged acceptable for an accredited repair.

Per the primary reference source, AR100, only unfiltered vibration levels are required. Thus, a vibration spectrum is not required.

There will be a 1-year grace period following the publishing date of a revised edition of AR100; which would be sufficient time for both auditors and accredited service centers to implement any changes necessary to conform to the revised edition.  Further, if there was a change(s) in AR100 that appeared to require a longer period for implementation, that would be dealt with on a case by case basis.

There needs to be one temperature sensor on each part (usually a stator) being processed in the burn off oven.

No, oven temperature sensing is required. However, it must be assured that the part being baked has attained the varnish/resin manufacturer’s minimum curing temperature, and held at or above that temperature for at least the minimum cure time given by the varnish/resin manufacturer.

There is a requirement to “maintain a record of the accreditation label serial numbers and motors they are placed on.” Is there particular information that’s required to be documented? Is there a reporting requirement for the information?

The specific text on this topic is given in the program terms and conditions as:

"Accredited firms must maintain a list of labeled motors with corresponding label and service center job numbers. At a minimum the listing for each accredited repair must include the label number and the service center job number.  Additional information about the repaired motor, such as manufacturer, power rating, speed, serial number, etc. can be included in the listing, but is not required."

Motors without terminal boxes are eligible for Accredited repairs.

Our service center is using a VFD with a sine wave filter as the power supply for our motor test panel. It also has readouts for phase voltage and current. Does this satisfy EASA Accreditation in regards to the test panel requirements?

Based on the Accreditation Checklist and AR100 clause 4.5, the motor needs to be test operated at rated voltage and frequency. Thus, the use of a VFD would be acceptable as long as the test run meets these requirements. Using the sine wave filter is beneficial because the test results should be comparable to those if and when the motor is operated from a utility power supply. The voltage and current for the motor should be measured somewhere between the output of the test panel and the motor.

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