EMB ERJ 135 ER/LR
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 11
Training / Qualification; Human-Machine Interface; Confusion; Situational Awareness
ATC Issue All Types; Conflict Airborne Conflict; Deviation - Altitude Excursion From Assigned Altitude; Deviation / Discrepancy - Procedural Clearance
Air Traffic Control Issued Advisory / Alert; Flight Crew Requested ATC Assistance / Clarification; Flight Crew FLC complied w / Automation / Advisory
Human Factors; Company Policy; Aircraft; Procedure
I was the On Job Training Instructor. The Embraer 135 (E135) was on a heading of 340 level at 6000 feet. A PA-28 was enroute westbound at 6500 feet. My trainee issued traffic to both aircraft. The PA-28 reported the E135 in sight; when the E135 was approximately 1 mile south of the PA-28 we observed E135's mode C was reading 200 feet high. The trainee asked the E135 to verify level at 6000 feet. During this transmission; the E135 indicated climbing through 6300 feet. The E135 advised they were responding to an RA and they climbed through 6500 feet. After the aircraft had passed; I asked the E135 to verify they received a climb RA for the PA-28 above them. The E135 responded affirmative. There was no observed traffic below the E135 in their vicinity.I advised the trainee that in this situation an immediate traffic alert would have been more appropriate than questioning the pilot. In this case; the TCAS did the opposite of what it should have done. This information should be forwarded to whomever is responsible for looking into TCAS errors.
SCT TRACON Controller reported an aircraft restricted to 6;000 feet received a TCAS/RA and climbed for a VFR aircraft above it at 6;500 feet.