Flight crew avoids collision by responding to TCASII RA.

Attributes
ACN	292779
Time
Date	199412
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : phk
State Reference	FL
Altitude	msl bound lower : 9000 msl bound upper : 10000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : mia
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Route In Use	enroute : direct enroute airway : zma
Flight Plan	IFR
Aircraft 2
Operator	general aviation : corporate
Make Model Name	Gates Learjet Corp Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	descent other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 6200 flight time type : 300
ASRS Report	292779
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 : 16000
ASRS Report	293238
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 500 vertical : 500
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

At XA50Z, 10000 ft MSL assigned, we got a TCASII TA for an aircraft 12 O'clock and descending into us. We looked for the traffic, but did not pick it up. The TCASII gave an RA and commanded a 2500 FPM descent. We descended to 9000 ft. The lear jet passed over and a little to the right. Our descent was a left turning descent. I believe that TCASII increased the missed distance. ZMA never called out the traffic. We reported the deviation to ZMA.

Original NASA ASRS Text

Title: FLC AVOIDS COLLISION BY RESPONDING TO TCASII RA.

Narrative: AT XA50Z, 10000 FT MSL ASSIGNED, WE GOT A TCASII TA FOR AN ACFT 12 O'CLOCK AND DSNDING INTO US. WE LOOKED FOR THE TFC, BUT DID NOT PICK IT UP. THE TCASII GAVE AN RA AND COMMANDED A 2500 FPM DSCNT. WE DSNDED TO 9000 FT. THE LEAR JET PASSED OVER AND A LITTLE TO THE R. OUR DSCNT WAS A L TURNING DSCNT. I BELIEVE THAT TCASII INCREASED THE MISSED DISTANCE. ZMA NEVER CALLED OUT THE TFC. WE RPTED THE DEV TO ZMA.

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.