A CFI allowed his student to descend into vny class D airspace while on the VOR approach to bur.

Attributes
ACN	516320
Time
Date	200106
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : vny.vor
State Reference	CA
Altitude	msl bound lower : 2600 msl bound upper : 3100
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : c90.tracon
Operator	general aviation : personal
Make Model Name	Cessna Aircraft Undifferentiated or Other Model
Flight Phase	descent : approach landing : missed approach
Route In Use	approach : instrument non precision
Flight Plan	None
Person 1
Affiliation	other
Function	instruction : instructor
Qualification	pilot : cfi pilot : commercial pilot : instrument pilot : multi engine
Experience	flight time last 90 days : 200 flight time total : 610 flight time type : 400
ASRS Report	516320
Events
Anomaly	airspace violation : entry altitude deviation : excursion from assigned altitude non adherence : far non adherence : published procedure non adherence : clearance
Resolutory Action	controller : issued advisory
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Instrument training flight. High density traffic area. VFR practice approach. Congested ATC frequency. Student descended below minimum altitude for published segment of VOR approach to bur. Usually not critical situation in VFR conditions. In this case, descent caused aircraft to penetrate vny class D surface area by approximately 400 ft. Then, had student execute missed approach due to premature descent, called missed approach to socal and was advised that we had penetrated vny class D airspace. Was told to squawk 1200 and exit sector wbound. No phone number was given, nor any action pursued. Had student hold over fim for approximately 15 mins before contacting approach for additional VFR practice approachs. Socal advised us again of the importance of maintaining 3000 FPM during that segment of approach, due to vny class D. We acknowledged and proceeded with additional practice VFR approachs. On most practice VFR approachs, I allow students to descend below minimum altitude before drawing their attention to the deviation. When they notice error (law of intensity) it leaves a lasting impact. My error was in allowing student to do this over, and into, vny class D airspace. Prevention: increased attention to the environment we train in.

Original NASA ASRS Text

Title: A CFI ALLOWED HIS STUDENT TO DSND INTO VNY CLASS D AIRSPACE WHILE ON THE VOR APCH TO BUR.

Narrative: INST TRAINING FLT. HIGH DENSITY TFC AREA. VFR PRACTICE APCH. CONGESTED ATC FREQ. STUDENT DSNDED BELOW MINIMUM ALT FOR PUBLISHED SEGMENT OF VOR APCH TO BUR. USUALLY NOT CRITICAL SIT IN VFR CONDITIONS. IN THIS CASE, DSCNT CAUSED ACFT TO PENETRATE VNY CLASS D SURFACE AREA BY APPROX 400 FT. THEN, HAD STUDENT EXECUTE MISSED APCH DUE TO PREMATURE DSCNT, CALLED MISSED APCH TO SOCAL AND WAS ADVISED THAT WE HAD PENETRATED VNY CLASS D AIRSPACE. WAS TOLD TO SQUAWK 1200 AND EXIT SECTOR WBOUND. NO PHONE NUMBER WAS GIVEN, NOR ANY ACTION PURSUED. HAD STUDENT HOLD OVER FIM FOR APPROX 15 MINS BEFORE CONTACTING APCH FOR ADDITIONAL VFR PRACTICE APCHS. SOCAL ADVISED US AGAIN OF THE IMPORTANCE OF MAINTAINING 3000 FPM DURING THAT SEGMENT OF APCH, DUE TO VNY CLASS D. WE ACKNOWLEDGED AND PROCEEDED WITH ADDITIONAL PRACTICE VFR APCHS. ON MOST PRACTICE VFR APCHS, I ALLOW STUDENTS TO DSND BELOW MINIMUM ALT BEFORE DRAWING THEIR ATTN TO THE DEV. WHEN THEY NOTICE ERROR (LAW OF INTENSITY) IT LEAVES A LASTING IMPACT. MY ERROR WAS IN ALLOWING STUDENT TO DO THIS OVER, AND INTO, VNY CLASS D AIRSPACE. PREVENTION: INCREASED ATTN TO THE ENVIRONMENT WE TRAIN IN.

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.