Small aircraft pilot descended below minimum crossing altitude during an approach to hut.

Attributes
ACN	256563
Time
Date	199311
Day	Sun
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : hut
State Reference	KS
Altitude	msl bound lower : 2600 msl bound upper : 3000
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : ict
Operator	general aviation : personal
Make Model Name	Small Aircraft
Flight Phase	descent : approach
Route In Use	approach : straight in enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 50 flight time total : 1400 flight time type : 600
ASRS Report	256563
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	altitude deviation : overshoot non adherence : published procedure non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Had RNAV set to en route RNAV to airport. Punched off RNAV to VOR and then didn't set to ILS back course runway 13. In confusion, let altitude slip below 3000 ft before storg intersection. Saw airport after storg intersection. Needed to verify that ILS back course was selected. Callback conversation with reporter revealed the following: reporter couldn't remember details but said he had VOR information in one position of his RNAV and ILS information in another. He pushed the wrong button and was chasing VOR information instead of ILS. During the ensuing confusion, he simply descended below the minimum crossing altitude at storg intersection.

Original NASA ASRS Text

Title: SMA PLT DSNDED BELOW MINIMUM XING ALT DURING AN APCH TO HUT.

Narrative: HAD RNAV SET TO ENRTE RNAV TO ARPT. PUNCHED OFF RNAV TO VOR AND THEN DIDN'T SET TO ILS BACK COURSE RWY 13. IN CONFUSION, LET ALT SLIP BELOW 3000 FT BEFORE STORG INTXN. SAW ARPT AFTER STORG INTXN. NEEDED TO VERIFY THAT ILS BACK COURSE WAS SELECTED. CALLBACK CONVERSATION WITH REPORTER REVEALED THE FOLLOWING: RPTR COULDN'T REMEMBER DETAILS BUT SAID HE HAD VOR INFO IN ONE POS OF HIS RNAV AND ILS INFO IN ANOTHER. HE PUSHED THE WRONG BUTTON AND WAS CHASING VOR INFO INSTEAD OF ILS. DURING THE ENSUING CONFUSION, HE SIMPLY DSNDED BELOW THE MINIMUM XING ALT AT STORG INTXN.

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.