Tower controller providing OJT described a loss of separation between an IFR arrival and an IFR depa...

Attributes
ACN	1097088
Time
Date	201306
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	M-20 Series Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	Landing
Flight Plan	IFR
Aircraft 2
Make Model Name	Bonanza 33
Operating Under FAR Part	Part 91
Flight Phase	Initial Climb
Flight Plan	IFR
Person 1
Function	Instructor Local
Qualification	Air Traffic Control Fully Certified
Events
Anomaly	ATC Issue All Types Deviation - Procedural Published Material / Policy

Narrative:

My developmental departed an IFR BE33 with an IFR M20P on a 2 mile final. The low ceiling prevented us from visually observing the M20P. The M20P did not have the field in sight and executed a missed approach. The BE33 and M20P ended up two miles apart laterally and 300 ft vertically. I was well aware of the low ceiling and the unusually high altitude of the inbound M20P. I should not of have permitted my developmental to depart the BE33 in this situation; especially without having the M20P in sight to provide visual separation. Proper application of the visual separation rules would have prevented this situation from happening. Making my developmental more aware of the situation and likelihood of the succeeding aircraft to execute a missed approach may have prevented him from departing the BE33.

Original NASA ASRS Text

Title: Tower Controller providing OJT described a loss of separation between an IFR arrival and an IFR departure when the final traffic executed a missed approach due to weather.

Narrative: My Developmental departed an IFR BE33 with an IFR M20P on a 2 mile final. The low ceiling prevented us from visually observing the M20P. The M20P did not have the field in sight and executed a missed approach. The BE33 and M20P ended up two miles apart laterally and 300 FT vertically. I was well aware of the low ceiling and the unusually high altitude of the inbound M20P. I should not of have permitted my Developmental to depart the BE33 in this situation; especially without having the M20P in sight to provide visual separation. Proper application of the visual separation rules would have prevented this situation from happening. Making my Developmental more aware of the situation and likelihood of the succeeding aircraft to execute a missed approach may have prevented him from departing the BE33.

Data retrieved from NASA's ASRS site as of July 2013 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.

Tower controller providing OJT described a loss of separation between an IFR arrival and an IFR departure when the final traffic executed a missed approach due to weather.