A light aircraft instructor reported near midair collision with a similar light aircraft that took o...

Attributes
ACN	889709
Time
Date	201005
Local Time Of Day	1201-1800
Place
Locale Reference	K81.Airport
State Reference	KS
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Small Aircraft Low Wing 1 Eng Retractable Gear
Operating Under FAR Part	Part 91
Flight Phase	Climb
Route In Use	Direct
Flight Plan	None
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	Climb
Route In Use	None
Person 1
Function	Instructor Pilot Not Flying
Qualification	Flight Crew Commercial Flight Crew Flight Instructor Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 65 Flight Crew Total 1090 Flight Crew Type 3
Events
Anomaly	Conflict NMAC Deviation - Procedural FAR
Miss Distance	Horizontal 20 Vertical 0

Narrative:

During climb out of paeola airport K81; the pilot flying was an instrument student under the hood. Aircraft 1 was climbing to a maneuvering VFR altitude of 5500 MSL. Aircraft 2 departed behind aircraft 1 from K81. Extreme VFR conditions prevailed and both aircraft departed and remained VFR. After leveling off at 5500 MSL; aircraft 1 received a TA from the on board flight instrument system (fis) of an aircraft at similar altitude and the same position as aircraft 1 was. After completing a visual scan; the instructor on board aircraft 1 noted aircraft 2 climbing with aircraft 1; matching speed and altitude as to stay at approx. A 4 o'clock position; the aircraft came within 20 feet of aircraft 1's wing tip and matched altitude. After the instructor moved his head; aircraft 2 announced over CTAF 'made you look' - indicating that aircraft 2 had intentionally flown in formation with aircraft 1 during the climb out and then turned his transponder on; setting off aircraft 1's fis (traffic) system. After rocking his wings; aircraft 2 banked 90 degrees to the right and started at 30 degree nose down descent. The TA was then resolved and normal flight continued. To note; no formation flying was discussed prior to the flight or authorized by the PIC/instructor of aircraft 1.

Original NASA ASRS Text

Title: A light aircraft instructor reported NMAC with a similar light aircraft that took off behind them and joined up in a formation maneuver without the reporter's knowledge.

Narrative: During climb out of Paeola airport K81; the pilot flying was an instrument student under the hood. Aircraft 1 was climbing to a maneuvering VFR altitude of 5500 MSL. Aircraft 2 departed behind Aircraft 1 from K81. Extreme VFR conditions prevailed and both aircraft departed and remained VFR. After leveling off at 5500 MSL; aircraft 1 received a TA from the on board flight instrument system (FIS) of an aircraft at similar altitude and the same position as aircraft 1 was. After completing a visual scan; the instructor on board aircraft 1 noted aircraft 2 climbing with aircraft 1; matching speed and altitude as to stay at approx. a 4 o'clock position; the aircraft came within 20 feet of aircraft 1's wing tip and matched altitude. After the instructor moved his head; aircraft 2 announced over CTAF 'Made you look' - indicating that aircraft 2 had intentionally flown in formation with aircraft 1 during the climb out and then turned his transponder on; setting off aircraft 1's FIS (Traffic) system. After rocking his wings; aircraft 2 banked 90 degrees to the right and started at 30 degree nose down descent. The TA was then resolved and normal flight continued. To note; no formation flying was discussed prior to the flight or authorized by the PIC/Instructor of aircraft 1.

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.

A light aircraft instructor reported near midair collision with a similar light aircraft that took off behind them and joined up in a formation maneuver without the reporter's knowledge.