One, having done flight ops quality assessment on a major Mexican airline our team found many discrepancies in training and experience. This is not new.
This airplane was operated by the Interior Ministry of the Government of Mexico and nobody in any seat was remotely qualified to operate to operate the Lear 45
https://en.wikipedia.org/wiki/2008_Mexico_City_Learjet_cras
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Pilot Martín Olíva and co-pilot Álvaro Sánchez[13] were not certified to operate the Learjet 45. The investigation concluded that both pilots had received fraudulent certifications: Captain Olíva lied about the number of training flights he had made, and had issues on the few training flights he did complete, while Captain Sánchez lied about being a Learjet 45 instructor. Both men had taken advantage of a corrupt system to get false training documents and some unsigned Learjet 45 certification forms from their flight schools. These revelations led Mexican authorities to suspend the licences of both flight schools.
Conversation among the flight crew further indicates that they had little familiarity with the operation of the plane; they voiced confusion on several occasions about the cockpit instruments and failed to enter the proper information into the flight computers, did not follow a proper flight plan, and had navigational difficulties, missing their original arrival to San Luis Potosí by over 250 nautical miles (460 km). Further, their in-flight conversations were more of the nature of people driving a car, not of trained pilots following a proper flight plan.
That corrupt system still exists.
Second, Jet Rescue Air Ambulance crashed a Lear 35 in Cuernavaca in 2023. One crash for a small operation is a tragedy, two in as many years is a trend.
https://asn.flightsafety.org/wikibase/347512