Narrative:

I had the air carrier X flight sbound at FL320. I received a handoff on the air carrier Y flight; also sbound; climbing to 170. While I entered 'FL300' into the air carrier Y data block; I issued 'FL330' to the pilot. This put the 2 aircraft in eventual conflict. Why did I make such an error? I contribute it to mental fatigue. Too much time on position; the complete lack of available leave; and the threat of discipline if we call in sick; I am at work fatigued. I would not have been here today (sick leave) if I thought I wouldn't be disciplined. Safety is being compromised.

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Original NASA ASRS Text

Title: ZDC CTLR ISSUED AN ACR CLRNC TO CLB THROUGH OCCUPIED ALT; CITING FATIGUE AS A CONTRIBUTING FACTOR.

Narrative: I HAD THE ACR X FLT SBOUND AT FL320. I RECEIVED A HDOF ON THE ACR Y FLT; ALSO SBOUND; CLBING TO 170. WHILE I ENTERED 'FL300' INTO THE ACR Y DATA BLOCK; I ISSUED 'FL330' TO THE PLT. THIS PUT THE 2 ACFT IN EVENTUAL CONFLICT. WHY DID I MAKE SUCH AN ERROR? I CONTRIBUTE IT TO MENTAL FATIGUE. TOO MUCH TIME ON POS; THE COMPLETE LACK OF AVAILABLE LEAVE; AND THE THREAT OF DISCIPLINE IF WE CALL IN SICK; I AM AT WORK FATIGUED. I WOULD NOT HAVE BEEN HERE TODAY (SICK LEAVE) IF I THOUGHT I WOULDN'T BE DISCIPLINED. SAFETY IS BEING COMPROMISED.

Data retrieved from NASA's ASRS site as of January 2009 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.