Mdt overtook small transport on climbout, insufficient separation applied from takeoff.

Attributes
ACN	164475
Time
Date	199012
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sju
State Reference	PR
Altitude	msl bound lower : 1800 msl bound upper : 2400
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : sju tower : sju
Operator	common carrier : air carrier
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	climbout : intermediate altitude climbout : initial
Route In Use	enroute : on vectors
Aircraft 2
Operator	general aviation : corporate
Make Model Name	Medium Transport, High Wing, 2 Turboprop Eng
Flight Phase	climbout : intermediate altitude climbout : initial
Route In Use	enroute : on vectors
Person 1
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Experience	controller radar : 9
ASRS Report	164475
Person 2
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	atc equipment other atc equipment : unspecified other controllera
Resolutory Action	other
Consequence	Other
Miss Distance	horizontal : 9000 vertical : 600
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Small transport X departed sju heading 330 degrees to mkjm climbing to 9000'. Mdt Y departed 2 mins later heading 330 degrees climbing 9000' to mdlr. Sep was lost on departure between small transport X and mdt Y because of mdt Y faster climb rate and climbing speed, and sju tower failing to give enough spacing.

Original NASA ASRS Text

Title: MDT OVERTOOK SMT ON CLIMBOUT, INSUFFICIENT SEPARATION APPLIED FROM TKOF.

Narrative: SMT X DEPARTED SJU HDG 330 DEGS TO MKJM CLBING TO 9000'. MDT Y DEPARTED 2 MINS LATER HDG 330 DEGS CLBING 9000' TO MDLR. SEP WAS LOST ON DEP BTWN SMT X AND MDT Y BECAUSE OF MDT Y FASTER CLB RATE AND CLBING SPD, AND SJU TWR FAILING TO GIVE ENOUGH SPACING.

Data retrieved from NASA's ASRS site as of July 2007 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.