Pilot of an atx commander descends prematurely for his IAP ILS approach into mkc.

Attributes
ACN	362108
Time
Date	199702
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : mkc
State Reference	MO
Altitude	msl bound lower : 1600 msl bound upper : 2400
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : mkc tower : mkc
Operator	common carrier : air taxi
Make Model Name	Commander 500
Operating Under FAR Part	Part 135
Flight Phase	descent : approach landing : missed approach
Route In Use	arrival other enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air taxi
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 160 flight time total : 2170 flight time type : 160
ASRS Report	362108
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	altitude deviation : crossing restriction not met altitude deviation : excursion from assigned altitude non adherence : published procedure non adherence : clearance non adherence other other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance controller : provided flight assist other other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation
Situations
ATC Facility	procedure or policy : unspecified
Airport	other physical facility
Navigational Aid	Unspecified

Narrative:

After IAP clearance for mci airport, ILS runway 3, vectors from mkc approach control were given to intercept the localizer for the final approach course and clearance was received to fly the approach. While inbound and receiving marker beacon and GS indications, the mci tower controller issued climb instructions and a frequency change back to approach. Upon contacting mkc approach, the approach controller asked for verification of altitude (1600 ft MSL) as well as localizer and GS information from the last approach. The controller then issued vectors for a second approach to mkc ILS runway 3. An intercept of 050 degrees was given, and upon ctring the needle on the navigation instrument and beginning the approach, the controller repeated the 050 degree intercept heading as a new clearance and upon this heading the aircraft continued on through the localizer signal. The controller then issued a new heading of 360 degrees to reintercept the localizer and cleared for the mkc airport, ILS runway 3 approach upon localizer inbound. The DME was intermittent during the flight and providing blank or erroneous information. It was replaced several hours later. The marker beacon probably received a signal from ojc airport ILS runway 17 without the controller or pilot aware of the erroneous situation, and without proper DME information, the published descent probably began prior to reaching the OM on the published instrument approach. The aircraft now has a placard with respect to GS receiver indications on frequencys ending in .X5 like mkc ILS runway 3.

Original NASA ASRS Text

Title: PLT OF AN ATX COMMANDER DSNDS PREMATURELY FOR HIS IAP ILS APCH INTO MKC.

Narrative: AFTER IAP CLRNC FOR MCI ARPT, ILS RWY 3, VECTORS FROM MKC APCH CTL WERE GIVEN TO INTERCEPT THE LOC FOR THE FINAL APCH COURSE AND CLRNC WAS RECEIVED TO FLY THE APCH. WHILE INBOUND AND RECEIVING MARKER BEACON AND GS INDICATIONS, THE MCI TWR CTLR ISSUED CLB INSTRUCTIONS AND A FREQ CHANGE BACK TO APCH. UPON CONTACTING MKC APCH, THE APCH CTLR ASKED FOR VERIFICATION OF ALT (1600 FT MSL) AS WELL AS LOC AND GS INFO FROM THE LAST APCH. THE CTLR THEN ISSUED VECTORS FOR A SECOND APCH TO MKC ILS RWY 3. AN INTERCEPT OF 050 DEGS WAS GIVEN, AND UPON CTRING THE NEEDLE ON THE NAV INST AND BEGINNING THE APCH, THE CTLR REPEATED THE 050 DEG INTERCEPT HDG AS A NEW CLRNC AND UPON THIS HDG THE ACFT CONTINUED ON THROUGH THE LOC SIGNAL. THE CTLR THEN ISSUED A NEW HDG OF 360 DEGS TO REINTERCEPT THE LOC AND CLRED FOR THE MKC ARPT, ILS RWY 3 APCH UPON LOC INBOUND. THE DME WAS INTERMITTENT DURING THE FLT AND PROVIDING BLANK OR ERRONEOUS INFO. IT WAS REPLACED SEVERAL HRS LATER. THE MARKER BEACON PROBABLY RECEIVED A SIGNAL FROM OJC ARPT ILS RWY 17 WITHOUT THE CTLR OR PLT AWARE OF THE ERRONEOUS SIT, AND WITHOUT PROPER DME INFO, THE PUBLISHED DSCNT PROBABLY BEGAN PRIOR TO REACHING THE OM ON THE PUBLISHED INST APCH. THE ACFT NOW HAS A PLACARD WITH RESPECT TO GS RECEIVER INDICATIONS ON FREQS ENDING IN .X5 LIKE MKC ILS RWY 3.

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.