Air carrier X climbed to occupied altitude without clearance. Pilot deviation.

Attributes
ACN	135683
Time
Date	199002
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : rdu
State Reference	NC
Altitude	msl bound lower : 10000 msl bound upper : 11000
Environment
Flight Conditions	VMC
Light	Dawn
Aircraft 1
Controlling Facilities	artcc : zdc
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	enroute : direct
Flight Plan	IFR
Aircraft 2
Operator	other
Make Model Name	Small Transport, Low Wing, 2 Turboprop Eng
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 3
ASRS Report	135683
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : required legal separation non adherence : clearance
Independent Detector	other controllera
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	Other
Miss Distance	horizontal : 28200 vertical : 100
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Air carrier X assigned 10,000' on contact. Traffic was called at 11,000 small transport Y. Air carrier X said he had the aircraft in sight. After passing small transport Y, air carrier X climbed to 10,900 without clearance. When questioned, the pilot indicated he was correcting back to 10,000'. Halo was in place on small transport Y estimate distance at that point 4.7 mi.

Original NASA ASRS Text

Title: ACR X CLIMBED TO OCCUPIED ALT WITHOUT CLRNC. PLT DEVIATION.

Narrative: ACR X ASSIGNED 10,000' ON CONTACT. TFC WAS CALLED AT 11,000 SMT Y. ACR X SAID HE HAD THE ACFT IN SIGHT. AFTER PASSING SMT Y, ACR X CLIMBED TO 10,900 WITHOUT CLRNC. WHEN QUESTIONED, THE PLT INDICATED HE WAS CORRECTING BACK TO 10,000'. HALO WAS IN PLACE ON SMT Y ESTIMATE DISTANCE AT THAT POINT 4.7 MI.

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.