Air carrier X had less than standard separation from air carrier Y. System error.

Attributes
ACN	225128
Time
Date	199210
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : sjc
State Reference	CA
Altitude	msl bound lower : 2000 msl bound upper : 2000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : sjc
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	climbout : intermediate altitude
Route In Use	departure other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	climbout : intermediate altitude
Route In Use	departure other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar
ASRS Report	225128
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	Other
Miss Distance	horizontal : 14700 vertical : 900
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

I was working local control at sjc. I cleared an air carrier X to takeoff runway 12R. When he was about 1 mi southeast of sjc, I cleared another air carrier Y to takeoff runway 12L. I needed 3 mi between these 2 aircraft. I thought that I had enough spacing, but I had only 2.45 mi. The related factor is: I was concerned about disciplinary action being taken by management against me for a different factor. 3 months earlier, I became angry at a coworker. To punish me for my anger, management scheduled a 2 week unpaid suspension for me. The day before my suspension, I was working combined lcls and my mind was on my upcoming suspension and the resulting loss of wages.

Original NASA ASRS Text

Title: ACR X HAD LTSS FROM ACR Y. SYS ERROR.

Narrative: I WAS WORKING LCL CTL AT SJC. I CLRED AN ACR X TO TKOF RWY 12R. WHEN HE WAS ABOUT 1 MI SE OF SJC, I CLRED ANOTHER ACR Y TO TKOF RWY 12L. I NEEDED 3 MI BTWN THESE 2 ACFT. I THOUGHT THAT I HAD ENOUGH SPACING, BUT I HAD ONLY 2.45 MI. THE RELATED FACTOR IS: I WAS CONCERNED ABOUT DISCIPLINARY ACTION BEING TAKEN BY MGMNT AGAINST ME FOR A DIFFERENT FACTOR. 3 MONTHS EARLIER, I BECAME ANGRY AT A COWORKER. TO PUNISH ME FOR MY ANGER, MGMNT SCHEDULED A 2 WK UNPAID SUSPENSION FOR ME. THE DAY BEFORE MY SUSPENSION, I WAS WORKING COMBINED LCLS AND MY MIND WAS ON MY UPCOMING SUSPENSION AND THE RESULTING LOSS OF WAGES.

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.