Narrative:

Active runways were 11R and 11L. I was performing a skill check on local control with a developmental. A cherokee was cleared for take off; from runway 11R and issued runway heading. A seminole was cleared for take off; from the same runway; approximately 1 minute later and was issued a heading of 110. The controller said; 'cherokee; turn left heading 0-2-0.' about 30 seconds to a minute later he issued a heading of 020 to the seminole and switched to center frequency. The next transmission was to the seminole to fly heading 110 and contact center. When the seminole turned; it put him on a course directly at the cherokee. The center called to ask about the two aircraft due to their close proximity. During the development of this situation; I was writing a note; which caused me to miss the use of the incorrect type or call sign when he issued the 020 heading to the seminole. I was also unaware that the seminole was IFR when I observed his turn toward the north. Recommendation; due to this situation; I will be more diligent while performing skill checks and evaluations. I will attempt to perform these skill checks more as an observer while an instructor is plugged in with the developmental. This will allow me to write notes on the session while there is someone else working with the developmental.

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Original NASA ASRS Text

Title: Front Line Manager (FLM) performing a skill check on Local Controller failed to note and correct an incorrect heading assignment and read back error; resulting in a conflict event.

Narrative: Active runways were 11R and 11L. I was performing a skill check on Local Control with a developmental. A Cherokee was cleared for take off; from Runway 11R and issued runway heading. A Seminole was cleared for take off; from the same runway; approximately 1 minute later and was issued a heading of 110. The Controller said; 'Cherokee; turn left heading 0-2-0.' About 30 seconds to a minute later he issued a heading of 020 to the Seminole and switched to Center frequency. The next transmission was to the Seminole to fly heading 110 and contact Center. When the Seminole turned; it put him on a course directly at the Cherokee. The Center called to ask about the two aircraft due to their close proximity. During the development of this situation; I was writing a note; which caused me to miss the use of the incorrect type or call sign when he issued the 020 heading to the Seminole. I was also unaware that the Seminole was IFR when I observed his turn toward the north. Recommendation; due to this situation; I will be more diligent while performing skill checks and evaluations. I will attempt to perform these skill checks more as an observer while an instructor is plugged in with the developmental. This will allow me to write notes on the session while there is someone else working with the developmental.

Data retrieved from NASA's ASRS site as of April 2012 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.