TRACON controller providing OJT described an event where they cleared an aircraft to descend below t...

Attributes
ACN	994079
Time
Date	201202
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	IMC
Aircraft 1
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Landing
Flight Plan	IFR
Aircraft 2
Make Model Name	EMB ERJ 135 ER/LR
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Route In Use	Vectors
Flight Plan	IFR
Person 1
Function	Approach Departure
Events
Anomaly	ATC Issue All Types Deviation - Procedural FAR Deviation - Procedural Published Material / Policy Inflight Event / Encounter CFTT / CFIT

Narrative:

Training; approach procedure; widely spaced weather conditions: IFR; the weather caused for longitudinal compression thus requiring extra spacing on final approach. My trainee vectored a B757 a little too close behind another B757 causing me to concentrate on that scenario and I missed the initial check of an E135 on the frequency. I did not hear the E135's assigned altitude of 3;000; towards the 3;500 MVA. My trainee initiated a frequency change of the B757 to tower with insufficient wake turbulence spacing. I called local control to initiate a go-around. My trainee then noticed the E135 at 3;000 and issued a climb. I then issued an 'expedite climb' to the E135. The audio data indicates that the feeder controller assigned the embraer 5;000 MSL but the pilot read back 3;000.

Original NASA ASRS Text

Title: TRACON Controller providing OJT described an event where they cleared an aircraft to descend below the MVA while distracted by an overtake 'wake' situation on final and then failing to note an incorrect altitude assignment.

Narrative: Training; approach procedure; widely spaced weather conditions: IFR; The weather caused for longitudinal compression thus requiring extra spacing on final approach. My trainee vectored a B757 a little too close behind another B757 causing me to concentrate on that scenario and I missed the initial check of an E135 on the frequency. I did not hear the E135's assigned altitude of 3;000; towards the 3;500 MVA. My trainee initiated a frequency change of the B757 to Tower with insufficient wake turbulence spacing. I called Local Control to initiate a go-around. My trainee then noticed the E135 at 3;000 and issued a climb. I then issued an 'expedite climb' to the E135. The audio data indicates that the Feeder Controller assigned the Embraer 5;000 MSL but the pilot read back 3;000.

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.

TRACON controller providing OJT described an event where they cleared an aircraft to descend below the MVA while distracted by an overtake 'wake' situation on final and then failing to note an incorrect altitude assignment.