<< >> NASA ASRS Report 612198, March 2004

ZTL radar controller observed a C560 level off above assigned altitude of 10000 ft and then restart descent resulting in a conflict with C441 VFR at 11500 ft.

Attributes
ACN	612198
Time
Date	200403
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : avl.airport
State Reference	NC
Altitude	msl bound lower : 10000 msl bound upper : 13000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : ztl.artcc
Operator	general aviation : corporate
Make Model Name	Citation Excel
Operating Under FAR Part	Part 91
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : ztl.artcc
Operator	other
Make Model Name	Conquest I/Conquest II
Operating Under FAR Part	Part 91
Flight Phase	descent : intermediate altitude
Flight Plan	VFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 21 flight time total : 10
ASRS Report	612198
Person 2
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne critical non adherence : published procedure non adherence : clearance
Independent Detector	atc equipment : conflict alert atc equipment other atc equipment : radar/mode c aircraft equipment : tcas other controllera other flight crewa other flight crewb
Resolutory Action	controller : issued alert controller : issued new clearance flight crew : took evasive action
Consequence	faa : investigated
Miss Distance	horizontal : 6000 vertical : 1500
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

A C560G was descending into avl. I had issued several altitudes, walking him down over the clt arrs. Aircraft Y, a C441, was VFR at 11500 ft with advisories. The airplane, the C441, (conquest ii) is a regular customer. I told aircraft X to expedite to 10000 ft, VFR traffic was called. It was very busy and I needed to get aircraft X under some IFR traffic. I looked and aircraft X had leveled at 13000 ft. No warning, no RA, nothing. I asked to verify descending to 10000 ft and he said he was. On the next radar update he was still at 13000 ft.

Related reports:

• Controller in charge observed a local controller depart a ce...
• Acy controller observed phl approach controller descend air ...
• ZAU center controller observed a personal high performance t...

	Enter your search terms Submit search form
	Web www.37000feet.com

Original NASA ASRS Text

Title: ZTL RADAR CTLR OBSERVED A C560 LEVEL OFF ABOVE ASSIGNED ALT OF 10000 FT AND THEN RESTART DESCENT RESULTING IN A CONFLICT WITH C441 VFR AT 11500 FT.

Narrative: A C560G WAS DSNDING INTO AVL. I HAD ISSUED SEVERAL ALTS, WALKING HIM DOWN OVER THE CLT ARRS. ACFT Y, A C441, WAS VFR AT 11500 FT WITH ADVISORIES. THE AIRPLANE, THE C441, (CONQUEST II) IS A REGULAR CUSTOMER. I TOLD ACFT X TO EXPEDITE TO 10000 FT, VFR TFC WAS CALLED. IT WAS VERY BUSY AND I NEEDED TO GET ACFT X UNDER SOME IFR TFC. I LOOKED AND ACFT X HAD LEVELED AT 13000 FT. NO WARNING, NO RA, NOTHING. I ASKED TO VERIFY DSNDING TO 10000 FT AND HE SAID HE WAS. ON THE NEXT RADAR UPDATE HE WAS STILL AT 13000 FT.

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.