|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1201 To 1800|
|Locale Reference||atc facility : mkc|
|Altitude||msl bound lower : 5500|
msl bound upper : 7500
|Controlling Facilities||tracon : mci|
|Operator||common carrier : air taxi|
|Make Model Name||Small Aircraft, Low Wing, 1 Eng, Retractable Gear|
|Flight Phase||cruise other|
|Affiliation||company : air taxi|
|Function||flight crew : single pilot|
|Experience||flight time last 90 days : 150|
flight time total : 6600
flight time type : 1000
|Function||controller : approach|
|Qualification||controller : radar|
|Anomaly||non adherence : clearance|
other anomaly other
|Independent Detector||other controllera|
|Resolutory Action||flight crew : returned to intended course or assigned course|
|Primary Problem||Flight Crew Human Performance|
|Air Traffic Incident||Pilot Deviation|
Contacted mkc approach outside TCA and at 7500' MSL. Was 'cleared to enter TCA, descend to and maintain 5500 while in the TCA' clearance was read back and about 30 seconds later just as I was beginning descent, approach called to advise you are 'only about a mile from TCA.' this was the first indication I had that approach expected me to be at 5500 before entering the TCA. I turned to heading 120 degree and don't think that I penetrated the boundary. ATC did not say that I had violated the TCA. Two causes. 1) the TCA graphics show 20 NM as TCA diameter but doesn't specify that this is centered on the airport (RNAV wpt would be required and is not given.) 2) ATC clearance lead me to think that he knew how close and at what altitude and G/south, hence time to the TCA. I was too close to be issued a clearance to enter 2000' lower. Four minutes and 14 miles needed for normal rates. I've learned to ask about a 'cleared to enter the TCA'
Original NASA ASRS Text
Title: ATX SMA ENTERED TCA AT WRONG ALT.
Narrative: CONTACTED MKC APCH OUTSIDE TCA AND AT 7500' MSL. WAS 'CLRED TO ENTER TCA, DESCEND TO AND MAINTAIN 5500 WHILE IN THE TCA' CLRNC WAS READ BACK AND ABOUT 30 SECONDS LATER JUST AS I WAS BEGINNING DESCENT, APCH CALLED TO ADVISE YOU ARE 'ONLY ABOUT A MILE FROM TCA.' THIS WAS THE FIRST INDICATION I HAD THAT APCH EXPECTED ME TO BE AT 5500 BEFORE ENTERING THE TCA. I TURNED TO HEADING 120 DEG AND DON'T THINK THAT I PENETRATED THE BOUNDARY. ATC DID NOT SAY THAT I HAD VIOLATED THE TCA. TWO CAUSES. 1) THE TCA GRAPHICS SHOW 20 NM AS TCA DIAMETER BUT DOESN'T SPECIFY THAT THIS IS CENTERED ON THE ARPT (RNAV WPT WOULD BE REQUIRED AND IS NOT GIVEN.) 2) ATC CLRNC LEAD ME TO THINK THAT HE KNEW HOW CLOSE AND AT WHAT ALT AND G/S, HENCE TIME TO THE TCA. I WAS TOO CLOSE TO BE ISSUED A CLRNC TO ENTER 2000' LOWER. FOUR MINUTES AND 14 MILES NEEDED FOR NORMAL RATES. I'VE LEARNED TO ASK ABOUT A 'CLRED TO ENTER THE TCA'
Data retrieved from NASA's ASRS site as of August 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.