Independent audits of your motor repairs
Had electric motors repaired by a vendor in Mexico and need to be sure the work meets best practice? We verify it independently against the EASA AR100-2020 standard — and put it in a report you can act on.
When you can't tell if the repair was done right
An international company has critical motors serviced by a repair shop in Mexico. The motor runs when it comes back — but did the repair actually restore its efficiency and reliability, or just get it turning again?
A poor rewind, an overheated core, the wrong insulation class or undocumented testing won't show up on day one. They show up months later as wasted energy, premature failure and unplanned downtime. An independent audit against the EASA AR100-2020 standard removes the guesswork.
What the audit covers
We assess the repair the way EASA AR100-2020 expects it to be done — from the rewind data sheet to the final tests.
Repair records & rewind data
Review of the rewind data sheet, winding design, turns/connection, materials and insulation class against the motor nameplate and EASA AR100-2020 expectations.
Electrical test reports
Verification of insulation resistance / polarization index (IEEE 43), surge comparison, hi-pot, winding resistance and balance — what was tested, how, and whether results are within spec.
Core & thermal integrity
Core-loss testing and evidence that the stator core was not damaged during burnout — temperatures controlled, never overheated, per EASA good practice.
Mechanical & dimensional checks
Bearing fits and tolerances, shaft and housing dimensions, runout, balancing records and assembly workmanship.
Materials & VPI process
Confirmation of insulation system class, magnet wire, and that varnish treatment / VPI impregnation and oven curing were performed correctly.
Documentation & traceability
Whether the repair is properly documented, traceable, and supports the efficiency and reliability the equipment should deliver after repair.
How the engagement works
A clear, documented process that ends with an independent verdict you can share internally and with your supplier.
Scope & intake
We agree on which motors/repairs to review and gather the available repair documentation, test reports and nameplate data.
Document review
Our EASA AR100-2020-certified engineers assess the repair records against the standard and recognized industry practice.
On-site / in-shop inspection
Where needed, we inspect the motor(s) and witness or repeat key tests — on your site or at our facility.
Formal audit report
You receive an independent written report: findings, conformities and non-conformities, risk to reliability, and clear recommendations.
Debrief
We walk you and your supplier through the findings so corrective actions are unambiguous and actionable.
Why Grupo Marro
Many shops in Mexico are EASA members; we are the only one that is EASA AR-certified. That certification is precisely what makes our audit credible — we hold others to the same standard we are held to.
EASA AR100-2020 certified
Certified to the EASA standard for electric motor repair.
ISO 9001:2015
Quality-managed processes and traceable documentation.
35+ years of repairs
Decades of industrial motor repair across heavy industry.
Frequently asked questions
Get an independent verdict on your motor repairs
Tell us what was repaired and where. We'll scope an EASA AR100-2020 audit and give you a clear, documented answer.