A near miss between a small civilian plane and two military aircraft over an RAAF base in northern Australia has triggered an investigation.

The Australian Transport Safety Bureau (ATSB) is examining last month's incident when a Piper Aircraft PA-28 suffered a complete electrical failure and was diverted to RAAF Base Tindal in the Northern Territory.

"On final approach to land, the PA-28 came into close proximity with two military aircraft on approach to the same runway," the ATSB said.

ATSB officials categorised it as a serious incident and have begun interviewing witnesses, examining maintenance records and collecting other relevant information.

The probe is scheduled to finish early next year.

"A final report will be released at the conclusion of the investigation.

"Should a cr

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