Air carrier mdt flight crew goes 900' too low on clearance for ILS runway 22 at lex.

Attributes
ACN	179695
Time
Date	199105
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lex
State Reference	KY
Altitude	msl bound lower : 2300 msl bound upper : 3200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : lex
Operator	common carrier : air carrier
Make Model Name	Medium Transport, High Wing, 2 Turboprop Eng
Flight Phase	descent : approach
Route In Use	approach : straight in enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 7500 flight time type : 1200
ASRS Report	179695
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	non adherence : far non adherence other other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

The problem arose when we were cleared down to 2300' and to join the localizer for 22. We were VMC at the time. When we got to 2300', I noticed we were about 1200-1400' AGL on the radar altimeter. At that instant, the controller revised his clearance to joint the localizer at 3200', so we climbed up. Airport was VFR 4000'/12 mi, so we did not review approach procedure. We also thought 2300' was minimum vectoring altitude till I saw the radar altimeter.

Original NASA ASRS Text

Title: ACR MDT FLT CREW GOES 900' TOO LOW ON CLRNC FOR ILS RWY 22 AT LEX.

Narrative: THE PROB AROSE WHEN WE WERE CLRED DOWN TO 2300' AND TO JOIN THE LOC FOR 22. WE WERE VMC AT THE TIME. WHEN WE GOT TO 2300', I NOTICED WE WERE ABOUT 1200-1400' AGL ON THE RADAR ALTIMETER. AT THAT INSTANT, THE CTLR REVISED HIS CLRNC TO JOINT THE LOC AT 3200', SO WE CLBED UP. ARPT WAS VFR 4000'/12 MI, SO WE DID NOT REVIEW APCH PROC. WE ALSO THOUGHT 2300' WAS MINIMUM VECTORING ALT TILL I SAW THE RADAR ALTIMETER.

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.