Lax tower controller reported of a loss of separation when a smo departure was too close to an lax d...

Attributes
ACN	1421250
Time
Date	201702
Local Time Of Day	1201-1800
Place
Locale Reference	LAX.Tower
State Reference	CA
Environment
Light	Daylight
Aircraft 1
Make Model Name	Large Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Aircraft 2
Make Model Name	Medium Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 135
Flight Phase	Climb
Flight Plan	IFR
Person 1
Function	Handoff / Assist Local
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) 23
Events
Anomaly	ATC Issue All Types Conflict Airborne Conflict Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy

Narrative:

I was working local assist 2. We were busy with departures; and the tm (traffic manager) passed a strip for a smo departure (aircraft Y). After coordinating with the malibu sector I coordinated with smo and gave them a one minute heads-up; aircraft X started his takeoff roll and at the appropriate point I released the smo departure. The smo departure came off and we ended up with 2.75 between aircraft X and aircraft Y.I released the smo departure where I always do; but aircraft Y must have jumped on it as he got airborne and aircraft X must have been slow on his climb. I can give a little more room; but we had three more departures off of smo after aircraft Y; and I released them at the same point and the separation was adequate.

Original NASA ASRS Text

Title: LAX Tower Controller reported of a loss of separation when a SMO departure was too close to an LAX departure.

Narrative: I was working Local Assist 2. We were busy with departures; and The TM (Traffic Manager) passed a strip for a SMO departure (Aircraft Y). After coordinating with the Malibu Sector I coordinated with SMO and gave them a one minute heads-up; Aircraft X started his takeoff roll and at the appropriate point I released the SMO departure. The SMO departure came off and we ended up with 2.75 between Aircraft X and Aircraft Y.I released the SMO departure where I always do; but Aircraft Y must have jumped on it as he got airborne and Aircraft X must have been slow on his climb. I can give a little more room; but we had three more departures off of SMO after Aircraft Y; and I released them at the same point and the separation was adequate.

Data retrieved from NASA's ASRS site 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.

Lax tower controller reported of a loss of separation when a smo departure was too close to an lax departure.