<< >> NASA ASRS Report 438113, May 1999

ZLC controller climbs B190 to 12000 ft, in conflict with a descending HS25. Flight crew ATC review determined ATC incorrectly assigned 12000 ft to the B190.

Attributes
ACN	438113
Time
Date	199905
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	navaid : sln.vortac
State Reference	KS
Altitude	msl bound lower : 11000 msl bound upper : 11700
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zkc.artcc
Operator	common carrier : air carrier
Make Model Name	Beech 1900
Operating Under FAR Part	Part 135
Flight Phase	climbout : intermediate altitude
Route In Use	departure other
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zkc.artcc
Operator	general aviation : corporate
Make Model Name	HS 125 Series 1-600
Operating Under FAR Part	Part 91
Flight Phase	cruise : enroute altitude change
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 240 flight time total : 8000 flight time type : 3000
ASRS Report	438113
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Events
Anomaly	conflict : airborne less severe non adherence : published procedure
Independent Detector	aircraft equipment : tcas other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	faa : investigated faa : reviewed incident with flight crew
Miss Distance	vertical : 300
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Departed salina, ks. Cleared to 12000 ft MSL. Climbing through 11000 ft, we heard center clear a hawker jet down to 12000 ft. Center asked us to look for the hawker. We set TCASII to look up, but it did not indicate hawker until about 5 mi. We asked center if they wanted us to go back down to 11000 ft (we did this at 11700 ft). Center said that our assigned altitude was 11000 ft. We descended from 11700 ft to 11000 ft. Center told us to make telephone call to center after landing in mkc. Called center, told them our story. They listened to tape, called back and told us that center controller had cleared us to 12000 ft.

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Original NASA ASRS Text

Title: ZLC CTLR CLBS B190 TO 12000 FT, IN CONFLICT WITH A DSNDING HS25. FLC ATC REVIEW DETERMINED ATC INCORRECTLY ASSIGNED 12000 FT TO THE B190.

Narrative: DEPARTED SALINA, KS. CLRED TO 12000 FT MSL. CLBING THROUGH 11000 FT, WE HEARD CTR CLR A HAWKER JET DOWN TO 12000 FT. CTR ASKED US TO LOOK FOR THE HAWKER. WE SET TCASII TO LOOK UP, BUT IT DID NOT INDICATE HAWKER UNTIL ABOUT 5 MI. WE ASKED CTR IF THEY WANTED US TO GO BACK DOWN TO 11000 FT (WE DID THIS AT 11700 FT). CTR SAID THAT OUR ASSIGNED ALT WAS 11000 FT. WE DSNDED FROM 11700 FT TO 11000 FT. CTR TOLD US TO MAKE TELEPHONE CALL TO CTR AFTER LNDG IN MKC. CALLED CTR, TOLD THEM OUR STORY. THEY LISTENED TO TAPE, CALLED BACK AND TOLD US THAT CTR CTLR HAD CLRED US TO 12000 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.