PA28 unable to hold altitude because of turbulence and descends below MEA. ARTCC detects this and forwards information to saf tower.

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Attributes
ACN	468765
Time
Date	200004
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : saf.airport
State Reference	NM
Altitude	msl single value : 9000
Environment
Flight Conditions	VMC
Weather Elements	Turbulence
Light	Night
Aircraft 1
Controlling Facilities	artcc : zab.artcc tower : saf.tower
Operator	general aviation : instructional
Make Model Name	PA-28 Cherokee/Archer II/Dakota/Pillan/Warrior
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Route In Use	approach : instrument non precision arrival other
Flight Plan	IFR
Person 1
Affiliation	other
Function	instruction : instructor oversight : pic
Qualification	pilot : multi engine pilot : instrument pilot : commercial pilot : cfi pilot : atp
Experience	flight time last 90 days : 60 flight time total : 1600 flight time type : 8
ASRS Report	468765
Person 2
Affiliation	other
Function	instruction : trainee
Qualification	pilot : private
Experience	flight time last 90 days : 25 flight time total : 205 flight time type : 10
ASRS Report	469587
Events
Anomaly	altitude deviation : excursion from assigned altitude inflight encounter : turbulence non adherence : published procedure non adherence : clearance other anomaly other other spatial deviation
Independent Detector	atc equipment : msaw other controllera
Resolutory Action	controller : issued alert none taken : detected after the fact
Supplementary
Problem Areas	Environmental Factor Flight Crew Human Performance
Primary Problem	Environmental Factor

Narrative:

On victor airway at 9000 ft, requested practice VOR approach runway 33 at santa flight engineer. Cleared for the approach and were not on vectors. Attempted to contact santa flight engineer tower 3 times with no response. Previously reported unable to hold altitude due to turbulence to center controller. I was instructing instrument student at the time. Inadvertently descended below MEA. I was told by tower controller that center advised we had descended below MEA.

Original NASA ASRS Text

Title: PA28 UNABLE TO HOLD ALT BECAUSE OF TURB AND DSNDS BELOW MEA. ARTCC DETECTS THIS AND FORWARDS INFO TO SAF TWR.

Narrative: ON VICTOR AIRWAY AT 9000 FT, REQUESTED PRACTICE VOR APCH RWY 33 AT SANTA FE. CLRED FOR THE APCH AND WERE NOT ON VECTORS. ATTEMPTED TO CONTACT SANTA FE TWR 3 TIMES WITH NO RESPONSE. PREVIOUSLY RPTED UNABLE TO HOLD ALT DUE TO TURB TO CTR CTLR. I WAS INSTRUCTING INST STUDENT AT THE TIME. INADVERTENTLY DSNDED BELOW MEA. I WAS TOLD BY TWR CTLR THAT CTR ADVISED WE HAD DSNDED BELOW MEA.

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.