Owd local controller issues a low altitude warning to a pilot flying an IMC approach into owd, ma.

Attributes
ACN	620244
Time
Date	200406
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : owd.airport
State Reference	MA
Altitude	msl single value : 600
Environment
Flight Conditions	IMC
Weather Elements	Rain
Aircraft 1
Controlling Facilities	tower : owd.tower tower : mia.tower
Operator	general aviation : personal
Make Model Name	Small Aircraft, High Wing, 1 Eng, Retractable Gear
Operating Under FAR Part	Part 91
Navigation In Use	ils localizer only : 35
Flight Phase	descent : approach
Route In Use	approach : instrument non precision
Flight Plan	IFR
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : private pilot : instrument
Experience	flight time last 90 days : 20 flight time total : 2300 flight time type : 2200
ASRS Report	620244
Person 2
Affiliation	government : faa
Function	controller : approach
Events
Anomaly	aircraft equipment problem : critical altitude deviation : overshoot inflight encounter : weather non adherence : far other spatial deviation
Independent Detector	atc equipment : msaw other controllera
Resolutory Action	controller : issued advisory flight crew : took precautionary avoidance action flight crew : became reoriented
Supplementary
Problem Areas	Weather Aircraft Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

Inside the OM, descending to 580 ft minimum before the inner marker, received a low altitude warning from the tower asking that I check altitude immediately. Doing so, I noted and said to the tower that I was indicating 600 ft. The final approach was completed normally after the runway was sighted (and so reported to the tower, as requested). On the ground, it was determined that the altimeter setting was incorrect as compared to the ATIS in effect at the time of the approach, but the difference was relatively small. The altimeter and transponder will be checked for accuracy. The aircraft was last checked at its annual in feb/mar.

Original NASA ASRS Text

Title: OWD LCL CTLR ISSUES A LOW ALT WARNING TO A PLT FLYING AN IMC APCH INTO OWD, MA.

Narrative: INSIDE THE OM, DSNDING TO 580 FT MINIMUM BEFORE THE INNER MARKER, RECEIVED A LOW ALT WARNING FROM THE TWR ASKING THAT I CHK ALT IMMEDIATELY. DOING SO, I NOTED AND SAID TO THE TWR THAT I WAS INDICATING 600 FT. THE FINAL APCH WAS COMPLETED NORMALLY AFTER THE RWY WAS SIGHTED (AND SO RPTED TO THE TWR, AS REQUESTED). ON THE GND, IT WAS DETERMINED THAT THE ALTIMETER SETTING WAS INCORRECT AS COMPARED TO THE ATIS IN EFFECT AT THE TIME OF THE APCH, BUT THE DIFFERENCE WAS RELATIVELY SMALL. THE ALTIMETER AND XPONDER WILL BE CHKED FOR ACCURACY. THE ACFT WAS LAST CHKED AT ITS ANNUAL IN FEB/MAR.

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.