Altitude deviation.

Attributes
ACN	206788
Time
Date	199204
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : atl
State Reference	GA
Altitude	msl bound lower : 11000 msl bound upper : 11800
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : atl
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other descent : approach
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	departure other departure sid : sid
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 80 flight time total : 16000 flight time type : 7000
ASRS Report	206788
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 230 flight time total : 10000
ASRS Report	206605
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 0 vertical : 1800
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

TCASII resolution en route for landing atl. Atl approach control, altitude 11000 ft 2 aircraft displayed on TCASII. Received climb advisory climbed to 11800, received all cleared. Verified with atl approach of our altitude and TCASII resolution. Atl said traffic was no factor. Descended back to 11000 ft uneventful landing. Traffic appeared to be on takeoff climb out of atl. Supplemental information from acn 206605: atl approach said there was an aircraft at our 12 O'clock that would level at 10000 ft, but did not see a problem.

Original NASA ASRS Text

Title: ALTDEV.

Narrative: TCASII RESOLUTION ENRTE FOR LNDG ATL. ATL APCH CTL, ALT 11000 FT 2 ACFT DISPLAYED ON TCASII. RECEIVED CLB ADVISORY CLBED TO 11800, RECEIVED ALL CLRED. VERIFIED WITH ATL APCH OF OUR ALT AND TCASII RESOLUTION. ATL SAID TFC WAS NO FACTOR. DSNDED BACK TO 11000 FT UNEVENTFUL LNDG. TFC APPEARED TO BE ON TKOF CLB OUT OF ATL. SUPPLEMENTAL INFO FROM ACN 206605: ATL APCH SAID THERE WAS AN ACFT AT OUR 12 O'CLOCK THAT WOULD LEVEL AT 10000 FT, BUT DID NOT SEE A PROBLEM.

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.