B737-700 crew had less than legal spacing in ZID class a.

Attributes
ACN	521092
Time
Date	200108
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : zid.artcc
State Reference	IN
Altitude	msl single value : 28000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zid.artcc
Operator	common carrier : air carrier
Make Model Name	B737-700
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	cruise : enroute altitude change
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zid.artcc
Operator	common carrier : air carrier
Make Model Name	Regional Jet CL65, Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 16000 flight time type : 12000
ASRS Report	521092
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	conflict : airborne critical non adherence : required legal separation non adherence : far non adherence : published procedure other anomaly other
Independent Detector	aircraft equipment : tcas other controllera other flight crewa other flight crewb
Resolutory Action	controller : issued alert controller : issued new clearance flight crew : took evasive action none taken : detected after the fact other
Miss Distance	horizontal : 1000 vertical : 200
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Level at FL280 waiting to be cleared to filed altitude. As controller issued us a hard 90 degree turn we received a TA followed immediately by an RA to 'descend.' we complied with the turn and descent RA. As we rolled through the turn we observed an rj pass left to right in front of us. We also heard him on the radio tell ATC that he was taking RA action. ATC told us to return to FL280 and proceeded on course upon completion of maneuvering. Nothing else was said on radio.

Original NASA ASRS Text

Title: B737-700 CREW HAD LESS THAN LEGAL SPACING IN ZID CLASS A.

Narrative: LEVEL AT FL280 WAITING TO BE CLRED TO FILED ALT. AS CTLR ISSUED US A HARD 90 DEG TURN WE RECEIVED A TA FOLLOWED IMMEDIATELY BY AN RA TO 'DSND.' WE COMPLIED WITH THE TURN AND DSCNT RA. AS WE ROLLED THROUGH THE TURN WE OBSERVED AN RJ PASS L TO R IN FRONT OF US. WE ALSO HEARD HIM ON THE RADIO TELL ATC THAT HE WAS TAKING RA ACTION. ATC TOLD US TO RETURN TO FL280 AND PROCEEDED ON COURSE UPON COMPLETION OF MANEUVERING. NOTHING ELSE WAS SAID ON RADIO.

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.