Narrative:

Instructor was conducting a check flight; and crew was returning to sfb for closed traffic. Approximately 12 miles ene of lee while at 2;500 ft.; check instructor contacted orlando tracon on 119.4 requesting the monroe arrival. Crew navigated the aircraft along the north boundary of class B towards the north shore of lake monroe scanning for traffic visually. Approximately 17 miles east to northeast of lee; check instructor detected an aircraft at 10-11 o'clock at same altitude with little relative movement from left to right. Instructor verified the traffic map on the G1000 and received an alert of traffic at 10 o'clock 2 miles. Instructor took immediate evasive action imitating a left climbing turn to deconflict with traffic. Simultaneously; the other aircraft initiated a level climb; coming to within 200-300 ft. Of [our] aircraft right under the right wing. Aircraft Y was not identified to [us] by ATC; and no traffic advisories were issued before or after the near midair collision. Following the deconfliction; crew proceeded on the monroe arrival and completed the check without further incident.

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Original NASA ASRS Text

Title: Light twin instructor pilot reported an NMAC with another light aircraft in the vicinity of LEE airport.

Narrative: Instructor was conducting a check flight; and crew was returning to SFB for closed traffic. Approximately 12 miles ENE of LEE while at 2;500 ft.; Check Instructor contacted Orlando Tracon on 119.4 requesting the Monroe Arrival. Crew navigated the aircraft along the north boundary of Class B towards the north shore of Lake Monroe scanning for traffic visually. Approximately 17 miles east to northeast of LEE; Check Instructor detected an aircraft at 10-11 o'clock at same altitude with little relative movement from left to right. Instructor verified the Traffic Map on the G1000 and received an alert of traffic at 10 o'clock 2 miles. Instructor took immediate evasive action imitating a left climbing turn to deconflict with traffic. Simultaneously; the other aircraft initiated a level climb; coming to within 200-300 ft. of [our] aircraft right under the right wing. Aircraft Y was not identified to [us] by ATC; and no traffic advisories were issued before or after the NMAC. Following the deconfliction; crew proceeded on the Monroe arrival and completed the check without further incident.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.