An SR20 instructor and his student experienced an near midair collision with another aircraft as the...

Attributes
ACN	957615
Time
Date	201107
Local Time Of Day	0601-1200
Place
Locale Reference	BTL.Airport
State Reference	MI
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	SR20
Operating Under FAR Part	Part 91
Flight Phase	Descent
Flight Plan	None
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Component
Aircraft Component	TCAS Equipment
Person 1
Function	Pilot Not Flying
Qualification	Flight Crew Instrument Flight Crew Multiengine Flight Crew Commercial Flight Crew Flight Instructor
Experience	Flight Crew Last 90 Days 50 Flight Crew Total 330 Flight Crew Type 250
Events
Anomaly	Aircraft Equipment Problem Less Severe Conflict NMAC
Miss Distance	Horizontal 100 Vertical 300

Narrative:

Two main factors were that communication 2 was intermittently operating throughout flight. Traffic sensor became inoperative halfway through flight. On descent to pattern we were cleared to enter a 45 degree entry to left downwind for runway 23R.we were two miles south of the airport and at 2;000 MSL when the incident occurred. We had just began turning downwind when we saw another aircraft directly in front coming head on and only 300 ft below. He had been given an early turn south clearance from tower. We were aware of this; but were distracted from this due to instructor teaching in the cockpit. Once aircraft was noticed; instructor took control and took evasive action to avoid the other aircraft. We heard nothing from tower in terms of traffic advisory. Upon downwind; tower inquired if we were still on the frequency and informed that he had been attempting to call us at least three times concerning the traffic. We did not hear any of these calls; possibly due to communication 2 being inoperative. We switched to using communication 1 and continued as normal for pattern and landing.

Original NASA ASRS Text

Title: An SR20 Instructor and his student experienced an NMAC with another aircraft as they entered the pattern. An intermittently operable COMM 2 system may have precluded their reception of traffic advisories from the Tower.

Narrative: Two main factors were that COM 2 was intermittently operating throughout flight. Traffic sensor became inoperative halfway through flight. On descent to pattern we were cleared to enter a 45 degree entry to left downwind for Runway 23R.We were two miles south of the airport and at 2;000 MSL when the incident occurred. We had just began turning downwind when we saw another aircraft directly in front coming head on and only 300 FT below. He had been given an early turn south clearance from Tower. We were aware of this; but were distracted from this due to Instructor teaching in the cockpit. Once aircraft was noticed; Instructor took control and took evasive action to avoid the other aircraft. We heard nothing from Tower in terms of traffic advisory. Upon downwind; Tower inquired if we were still on the frequency and informed that he had been attempting to call us at least three times concerning the traffic. We did not hear any of these calls; possibly due to COM 2 being inoperative. We switched to using COM 1 and continued as normal for pattern and landing.

Data retrieved from NASA's ASRS site as of April 2012 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.

An SR20 instructor and his student experienced an near midair collision with another aircraft as they entered the pattern. An intermittently operable comm 2 system may have precluded their reception of traffic advisories from the tower.