<< >> NASA ASRS Report 333360, March 1996

Flight crew of an medium large transport in level flight on a high downwind leg climbed in response to a TCASII RA and then observed a lear jet pass 200 ft underneath their aircraft at the altitude they had vacated. Near midair collision.

Attributes
ACN	333360
Time
Date	199603
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : iah
State Reference	TX
Altitude	msl bound lower : 6000 msl bound upper : 6200
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : iah
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	cruise other other
Flight Plan	IFR
Aircraft 2
Make Model Name	Gates Learjet Corp Undifferentiated or Other Model
Operating Under FAR Part	other : unknown
Flight Phase	cruise other other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	other other : other pilot : atp pilot : instrument
Experience	flight time last 90 days : 240 flight time total : 25000 flight time type : 10000
ASRS Report	333360
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	conflict : nmac non adherence : required legal separation other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : took evasive action flight crew : returned to intended course or assigned course
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 0 vertical : 200
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Downwind to runway 26 iah, approach vector at 6000 ft, received TA 2 O'clock, 5 NM, -1000 ft (5000 ft). Received RA 2 O'clock, 2 NM, 200 ft (5800 ft MSL). Climbed to 6200 ft MSL, saw lear jet pass directly below at -200 ft TCASII (6000 ft MSL). On clear of conflict, descended back to 6000 ft. ATC said 'air carrier X, you have traffic out there, it's a lear jet.' that's all that was said.

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Original NASA ASRS Text

Title: FLC OF AN MLG IN LEVEL FLT ON A HIGH DOWNWIND LEG CLBED IN RESPONSE TO A TCASII RA AND THEN OBSERVED A LEAR JET PASS 200 FT UNDERNEATH THEIR ACFT AT THE ALT THEY HAD VACATED. NMAC.

Narrative: DOWNWIND TO RWY 26 IAH, APCH VECTOR AT 6000 FT, RECEIVED TA 2 O'CLOCK, 5 NM, -1000 FT (5000 FT). RECEIVED RA 2 O'CLOCK, 2 NM, 200 FT (5800 FT MSL). CLBED TO 6200 FT MSL, SAW LEAR JET PASS DIRECTLY BELOW AT -200 FT TCASII (6000 FT MSL). ON CLR OF CONFLICT, DSNDED BACK TO 6000 FT. ATC SAID 'ACR X, YOU HAVE TFC OUT THERE, IT'S A LEAR JET.' THAT'S ALL THAT WAS SAID.

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.