Investing.com -- Europe's top aviation regulator indicated that relations with the U.S. Federal Aviation Administration have strengthened and said Boeing is responding appropriately to regulatory oversight.

Florian Guillermet, Executive Director of the European Union Aviation Safety Agency, said in an interview that cooperation between the agencies has improved significantly. The two regulators are now working as trustful partners, he said.

Guillermet stated that EASA is in a phase where it trusts the FAA to take appropriate actions. He said he has no indication that the FAA is not fulfilling its responsibilities or that Boeing is not reacting appropriately.

The EASA chief said the FAA is addressing its oversight duties and Boeing is responding in the appropriate manner. His comments applied to both aircraft certification and production issues, he added.

Relations between EASA and the FAA deteriorated after fatal Boeing 737 MAX crashes in 2018 and 2019. The accidents were linked to flawed software and poor oversight, which led EASA to conduct closer examinations of Boeing designs.

EASA serves as the lead regulator for Airbus (EPA:AIR) jets and is among several major agencies that certify domestic aircraft. These agencies recognize each other's decisions through bilateral agreements, though they retain the ability to ask detailed questions.