Air carrier on approach to runway 10 at ord described TCAS RA event when MD80 missed final turn.

Attributes
ACN	759700
Time
Date	200710
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ord.airport
State Reference	IL
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : c90.tracon
Operator	common carrier : air carrier
Make Model Name	Regional Jet 200 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : c90.tracon
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain observation : company check pilot
Experience	flight time last 90 days : 270 flight time total : 14000 flight time type : 6400
ASRS Report	759700
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne critical other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	controller : issued alert flight crew : took evasive action
Miss Distance	horizontal : 1200 vertical : 200
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

I was in the jumpseat conducting a routine line check. We were on final for runway 10 in ord; cleared for the visual approach and descending on the glidepath. We all saw an MD80 on base for the other runway complex off our left. That aircraft joined the final for our runway instead of his. We saw the potential conflict; got a TCAS RA and got word from the controller of the conflict; in that order. The captain leveled our aircraft and may have climbed a bit; allowing the MD80 to pass underneath the nose. Once he was in sight again; we resumed our approach to an uneventful landing. At closest approach; the MD80 was 200 ft below us and descending. I think he actually got slightly to our right as he got reorganized.

Original NASA ASRS Text

Title: ACR ON APCH TO RWY 10 AT ORD DESCRIBED TCAS RA EVENT WHEN MD80 MISSED FINAL TURN.

Narrative: I WAS IN THE JUMPSEAT CONDUCTING A ROUTINE LINE CHK. WE WERE ON FINAL FOR RWY 10 IN ORD; CLRED FOR THE VISUAL APCH AND DSNDING ON THE GLIDEPATH. WE ALL SAW AN MD80 ON BASE FOR THE OTHER RWY COMPLEX OFF OUR L. THAT ACFT JOINED THE FINAL FOR OUR RWY INSTEAD OF HIS. WE SAW THE POTENTIAL CONFLICT; GOT A TCAS RA AND GOT WORD FROM THE CTLR OF THE CONFLICT; IN THAT ORDER. THE CAPT LEVELED OUR ACFT AND MAY HAVE CLBED A BIT; ALLOWING THE MD80 TO PASS UNDERNEATH THE NOSE. ONCE HE WAS IN SIGHT AGAIN; WE RESUMED OUR APCH TO AN UNEVENTFUL LNDG. AT CLOSEST APCH; THE MD80 WAS 200 FT BELOW US AND DSNDING. I THINK HE ACTUALLY GOT SLIGHTLY TO OUR R AS HE GOT REORGANIZED.

Data retrieved from NASA's ASRS site as of January 2009 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.