Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 3
Communication Breakdown; Confusion; Situational Awareness
ATC Issue All Types; Conflict Ground Conflict; Less Severe; Conflict Airborne Conflict; Deviation / Discrepancy - Procedural Clearance; Ground Incursion Runway
Air Traffic Control Issued New Clearance
Procedure; Human Factors
Event started with LC2 requesting a ZILLI (southbound) SID from the South Controller (LC1). LC2 was told to follow the ZILLI in the slot (LUAW). LC1 had one ZILLI in a departure roll while another ZILLI was slowly going into LUAW. LC2 misunderstood and followed the wrong (first) ZILLI and ended up side by side with the second ZILLI. This was legal since they are on diverging heading; however; not preferred by the Departure area controller since it takes extra time and space to build the needed three miles. As the Assist; called the Departure area controller to explain and apologize. The line was busy. I called LC1's Assist to ask if they had called the Departure area controller to do the same. They said no. I then turned to the CIC who said that he was on the line talking to the Departure area controller. As I turned around and sat back down; I heard Aircraft X say that they had been cleared for takeoff; but had observed the RWSL 'Red' lights on and traffic was crossing downfield. I observed traffic crossing at taxiway AA and BB downfield. I had not heard the crossing or takeoff clearance instructions by the LC2 Controller who was also training. Perhaps the use of the memory aid when traffic is crossing or the runway is unusable.
LAX Tower Controller reported two side by side departures and a runway crossing that were not coordinated correctly.