Air Niugini, celebrating its 44th birthday on the same day, said this was the first time the airline was audited on enhanced IOSA requirements.
The IOSA program enables airlines including Air Niugini to review their safety processes using a worldwide standard that has become the single internationally accepted safety and security audit process for airlines.
Under IOSA, Air Niugini is assessed for operational management and control systems, including the areas of corporate organisation and management, flight operations, operational control, flight dispatch, aircraft engineering and maintenance, cabin operations, aircraft ground handling, cargo operations and operational security.
Air Niugini chief executive Simon Foo said this achievement provided continued assurance that Air Niugini met world-class safety and security standards when measured against the International Air Transport Association's global benchmark.
"At Air Niugini, safety is always our highest priority. It is expressed in everything we do and we are pleased to be one of the few airlines audited under the IOSA program since 2011, and we remain very proud of maintaining our unblemished safety record yet again in 2017."
"The purpose of the IOSA is to achieve an internationally recognised high standard in the fields of flight operations and safety and Air Niugini is pleased to re-secure this IOSA registration. I congratulate all our staff on this achievement, which is recognition of their dedication to the safety and security of our passengers," Foo said.
The audit on Air Niugini was conducted by an independent audit organisation accredited from IATA from July 3 to 7.