<< >> NASA ASRS Report 333209, April 1996

An air carrier B727 at FL350 got an 'RA' from an air carrier airbus 300 ft below them. The B727 flight crew took evasive action by climbing to FL355. The airbus continued its descent.

Attributes
ACN	333209
Time
Date	199604
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : cro
State Reference	FO
Altitude	msl bound lower : 35000 msl bound upper : 35500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : tncf
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Airbus Industrie Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	333209
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
ASRS Report	333414
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	vertical : 800
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

Departed cur, tracking A315 with a clearance to FL280. Checked on with cur control with our first reporting point, dusan estimate of XA23Z. Cur control instructed us to intercept 022 degree radial off beatrix. Cleared us to FL350 and upon reaching FL310, cleared direct veska. At FL310, proceeded direct veska. Soon after we leveled off at FL350, received TCASII TA. Traffic displayed was 1 O'clock 300 ft below. Immediately thereafter, at XA28Z a TCASII RA was received and complied with. Climbed to FL355 with positive identify on an airbus passing from right to left and descending. When aircraft was no longer a factor we returned to FL350. Throughout the incident, cur control was advised of our actions.

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Original NASA ASRS Text

Title: AN ACR B727 AT FL350 GOT AN 'RA' FROM AN ACR AIRBUS 300 FT BELOW THEM. THE B727 FLC TOOK EVASIVE ACTION BY CLBING TO FL355. THE AIRBUS CONTINUED ITS DSCNT.

Narrative: DEPARTED CUR, TRACKING A315 WITH A CLRNC TO FL280. CHKED ON WITH CUR CTL WITH OUR FIRST RPTING POINT, DUSAN ESTIMATE OF XA23Z. CUR CTL INSTRUCTED US TO INTERCEPT 022 DEG RADIAL OFF BEATRIX. CLRED US TO FL350 AND UPON REACHING FL310, CLRED DIRECT VESKA. AT FL310, PROCEEDED DIRECT VESKA. SOON AFTER WE LEVELED OFF AT FL350, RECEIVED TCASII TA. TFC DISPLAYED WAS 1 O'CLOCK 300 FT BELOW. IMMEDIATELY THEREAFTER, AT XA28Z A TCASII RA WAS RECEIVED AND COMPLIED WITH. CLBED TO FL355 WITH POSITIVE IDENT ON AN AIRBUS PASSING FROM R TO L AND DSNDING. WHEN ACFT WAS NO LONGER A FACTOR WE RETURNED TO FL350. THROUGHOUT THE INCIDENT, CUR CTL WAS ADVISED OF OUR ACTIONS.

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.