C172 instructor pilot reported executing a go around on approach to bec runway 1 when he noticed ano...

Narrative:

While on final approach to runway 1 at bec (beech factory airport); we executed a go-around at approximately 100 feet AGL because of another aircraft that was approaching on runway 19. The other aircraft executed a go-around at approximately the same time. Both aircraft side-stepped to their respective right; and both aircraft passed each other; opposite direction; with adequate separation. No CTAF calls were made by the other aircraft.postflight discussion with the crew of the other aircraft revealed that they were on the incorrect communication frequency. They'd forgotten to switch from the 3AU (augusta municipal airport) CTAF. (3AU is a nearby airport.) therefore; we did not hear each other's calls.light and variable winds prevailed throughout the evening. At the time of our arrival to bec; winds were reported 070 @ 6 KTS at aao (colonel james jabara airport). Aao is the nearest airport with an AWOS system. We selected runway 1 because the winds; although light; favored runway 1.contributing factors:1) winds were light and variable throughout the evening; which made runway selection ambiguous.2) improper communication frequency was used by the other aircraft.3) other aircraft was a checkride flight; so the PIC applicant was under pressure.4) both aircraft failed to see each other until on short final.good points:1) both aircraft executed proper go-arounds; which ensured adequate separation.2) both aircraft had landing lights on; which enhanced aircraft visibility.

Original NASA ASRS Text

Title: C172 instructor pilot reported executing a go around on approach to BEC Runway 1 when he noticed another aircraft on approach to Runway 19 who was not on CTAF frequency.

Narrative: While on final approach to Runway 1 at BEC (Beech Factory Airport); we executed a go-around at approximately 100 feet AGL because of another aircraft that was approaching on Runway 19. The other aircraft executed a go-around at approximately the same time. Both aircraft side-stepped to their respective right; and both aircraft passed each other; opposite direction; with adequate separation. No CTAF calls were made by the other aircraft.Postflight discussion with the crew of the other aircraft revealed that they were on the incorrect communication frequency. They'd forgotten to switch from the 3AU (Augusta Municipal Airport) CTAF. (3AU is a nearby airport.) Therefore; we did not hear each other's calls.Light and variable winds prevailed throughout the evening. At the time of our arrival to BEC; winds were reported 070 @ 6 KTS at AAO (Colonel James Jabara Airport). AAO is the nearest airport with an AWOS system. We selected Runway 1 because the winds; although light; favored Runway 1.Contributing factors:1) Winds were light and variable throughout the evening; which made runway selection ambiguous.2) Improper communication frequency was used by the other aircraft.3) Other aircraft was a checkride flight; so the PIC applicant was under pressure.4) Both aircraft failed to see each other until on short final.Good points:1) Both aircraft executed proper go-arounds; which ensured adequate separation.2) Both aircraft had landing lights on; which enhanced aircraft visibility.

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.

Attributes
ACN	1285950
Time
Date	201508
Local Time Of Day	0601-1200
Place
Locale Reference	BEC.Airport
State Reference	KS
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	Final Approach
Flight Plan	None
Aircraft 2
Make Model Name	Bonanza 36
Operating Under FAR Part	Part 91
Flight Phase	Final Approach
Person 1
Function	Instructor Pilot Not Flying
Qualification	Flight Crew Flight Instructor Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 90 Flight Crew Total 2800 Flight Crew Type 190
Events
Anomaly	Conflict NMAC Deviation - Procedural Published Material / Policy
Miss Distance	Horizontal 500 Vertical 0

C172 instructor pilot reported executing a go around on approach to bec runway 1 when he noticed another aircraft on approach to runway 19 who was not on CTAF frequency.