A cessna 150 instructor and student departed from assigned altitude. TRACON received a 'conflict ale...

Attributes
ACN	443020
Time
Date	199907
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : pae.airport
State Reference	WA
Altitude	msl bound lower : 2800 msl bound upper : 3000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zse.artcc
Operator	general aviation : instructional other Other
Operating Under FAR Part	Part 91
Navigation In Use	other ndb
Flight Phase	descent : approach
Route In Use	approach : instrument non precision arrival : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zse.artcc
Operator	general aviation : personal
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Navigation In Use	other ndb
Route In Use	approach : instrument non precision
Flight Plan	IFR
Person 1
Affiliation	other
Function	instruction : instructor oversight : pic
Qualification	pilot : instrument pilot : cfi pilot : commercial
Experience	flight time last 90 days : 150 flight time total : 2000 flight time type : 500
ASRS Report	443028
Person 2
Affiliation	other
Function	instruction : trainee
Qualification	pilot : private
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance
Independent Detector	atc equipment : conflict alert other flight crewa other flight crewb other other : 4
Resolutory Action	flight crew : returned to assigned altitude
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:

While on a training flight with an instrument student, cleared to ritts NDB near pae, at 3000 ft. Another aircraft on the NDB approach ahead of us at 2000 ft. As we approached (approximately 2 mi from) NDB in VFR conditions, given additional repeated, actually clearance from center, which student began copying. Also given TA for aircraft on the approach, which I visually located and advised center. Looking back, noted altitude deviation by student to 2800 ft, which we began to correct for. Center called to verify altitude, we advised at that point '2900 ft correcting to 3000 ft.' a short time later we were told to call center reference to a potential conflict. Center advised us they had a conflict alert due to our deviation. No collision hazard, as visual contact separation was maintained at all times, and we immediately corrected for the altitude deviation, when discovered, prior to center's advisory.

Original NASA ASRS Text

Title: A CESSNA 150 INSTRUCTOR AND STUDENT DEPARTED FROM ASSIGNED ALT. TRACON RECEIVED A 'CONFLICT ALERT' NEAR PAE.

Narrative: WHILE ON A TRAINING FLT WITH AN INST STUDENT, CLRED TO RITTS NDB NEAR PAE, AT 3000 FT. ANOTHER ACFT ON THE NDB APCH AHEAD OF US AT 2000 FT. AS WE APCHED (APPROX 2 MI FROM) NDB IN VFR CONDITIONS, GIVEN ADDITIONAL REPEATED, ACTUALLY CLRNC FROM CTR, WHICH STUDENT BEGAN COPYING. ALSO GIVEN TA FOR ACFT ON THE APCH, WHICH I VISUALLY LOCATED AND ADVISED CTR. LOOKING BACK, NOTED ALTDEV BY STUDENT TO 2800 FT, WHICH WE BEGAN TO CORRECT FOR. CTR CALLED TO VERIFY ALT, WE ADVISED AT THAT POINT '2900 FT CORRECTING TO 3000 FT.' A SHORT TIME LATER WE WERE TOLD TO CALL CTR REFERENCE TO A POTENTIAL CONFLICT. CTR ADVISED US THEY HAD A CONFLICT ALERT DUE TO OUR DEV. NO COLLISION HAZARD, AS VISUAL CONTACT SEPARATION WAS MAINTAINED AT ALL TIMES, AND WE IMMEDIATELY CORRECTED FOR THE ALTDEV, WHEN DISCOVERED, PRIOR TO CTR'S ADVISORY.

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.

A cessna 150 instructor and student departed from assigned altitude. TRACON received a 'conflict alert' near pae.