Approach controller providing OJT and the pilot involved described a conflict event during a positio...

Attributes
ACN	950173
Time
Date	201105
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	PA-46 Malibu Meridian
Operating Under FAR Part	Part 91
Flight Phase	Descent
Route In Use	Direct
Flight Plan	IFR
Aircraft 2
Make Model Name	Citation Excel (C560XL)
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Flight Plan	IFR
Person 1
Function	Approach
Qualification	Air Traffic Control Fully Certified
Person 2
Function	Approach Departure
Qualification	Air Traffic Control Developmental
Events
Anomaly	ATC Issue All Types Conflict Airborne Conflict Deviation - Procedural Published Material / Policy

Narrative:

With training in progress; aircraft X was issued a descent to 3;000 ft. The trainee quickly amended the altitude to 10;000 ft and said; 'leaving 10;000 ft; turn right heading 360 vector for descent.' the pilot read back; 'descend to 10;000 ft; then turn right heading 360; and descend and maintain 3;000 ft. The read back of 'descend and maintain 3;000 ft' was not caught by the trainee or the trainer. A relieving controller unplugged me and I noticed aircraft X descending through 10;000 ft and notified both the trainee and the relieving controller. The trainee hesitated a bit; then told aircraft X to maintain 10;000 ft; and issued traffic. The relieving controller didn't say anything to the pilot and just told the trainee to issue a heading. The trainee issued a 020 heading to aircraft X. Then the relieving controller told air carrier Y to turn right heading 360. The air carrier Y pilot replied that they were responding to a TCAS/RA and had the other aircraft in sight. When a controller is relieving a training session they should plug into another headset jack and monitor the frequencies while getting the briefing instead of unplugging the trainer.

Original NASA ASRS Text

Title: Approach Controller providing OJT and the pilot involved described a conflict event during a position relief period. The reporter noted the limited communications jacks available when training is being conducted.

Narrative: With training in progress; aircraft X was issued a descent to 3;000 FT. The trainee quickly amended the altitude to 10;000 FT and said; 'Leaving 10;000 FT; turn right heading 360 vector for descent.' The pilot read back; 'Descend to 10;000 FT; then turn right heading 360; and descend and maintain 3;000 FT. The read back of 'descend and maintain 3;000 FT' was not caught by the trainee or the trainer. A relieving Controller unplugged me and I noticed aircraft X descending through 10;000 FT and notified both the trainee and the relieving Controller. The trainee hesitated a bit; then told aircraft X to maintain 10;000 FT; and issued traffic. The relieving Controller didn't say anything to the pilot and just told the trainee to issue a heading. The trainee issued a 020 heading to aircraft X. Then the relieving Controller told Air Carrier Y to turn right heading 360. The Air Carrier Y pilot replied that they were responding to a TCAS/RA and had the other aircraft in sight. When a Controller is relieving a training session they should plug into another headset jack and monitor the frequencies while getting the briefing instead of unplugging the trainer.

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.

Approach controller providing OJT and the pilot involved described a conflict event during a position relief period. The reporter noted the limited communications jacks available when training is being conducted.