Air carrier X climb to occupied altitude received TCASII RA climb had less than standard separation from air carrier Y. Evasive action taken climb. System error.

Home

Browse by month

Random

Latest

About

Contact

Attributes
ACN	228878
Time
Date	199212
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : cam
State Reference	NY
Altitude	msl bound lower : 27000 msl bound upper : 28000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zbw
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	cruise other descent other
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
ASRS Report	228878
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 15000 flight time type : 800
ASRS Report	228875
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation non adherence : published procedure
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	faa : investigated
Miss Distance	horizontal : 6000 vertical : 500
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Air carrier Y descending to FL240. Air carrier X climbing to FL280. Air carrier Y was stopped at FL280. Climbing air carrier X was given a clearance to maintain FL270. Never received the clearance due to frequency congestion. Supplemental information from acn 228875: air carrier X in climb to FL280 after being cleared by ATC to FL280, received an RA on TCASII. Increased climb and leveled at FL280.

Original NASA ASRS Text

Title: ACR X CLB TO OCCUPIED ALT RECEIVED TCASII RA CLB HAD LTSS FROM ACR Y. EVASIVE ACTION TAKEN CLB. SYS ERROR.

Narrative: ACR Y DSNDING TO FL240. ACR X CLBING TO FL280. ACR Y WAS STOPPED AT FL280. CLBING ACR X WAS GIVEN A CLRNC TO MAINTAIN FL270. NEVER RECEIVED THE CLRNC DUE TO FREQ CONGESTION. SUPPLEMENTAL INFO FROM ACN 228875: ACR X IN CLB TO FL280 AFTER BEING CLRED BY ATC TO FL280, RECEIVED AN RA ON TCASII. INCREASED CLB AND LEVELED AT FL280.

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.