TCASII RA. - NASA ASRS

Attributes
ACN	286381
Time
Date	199410
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : tus
State Reference	AZ
Altitude	msl bound lower : 4800 msl bound upper : 5000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : tus
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Make Model Name	Cessna Single Piston Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	cruise other
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 4800 flight time type : 800
ASRS Report	286381
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp pilot : commercial
Experience	flight time last 90 days : 200 flight time total : 7500 flight time type : 500
ASRS Report	286382
Events
Anomaly	conflict : nmac other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : took evasive action other
Consequence	Other
Miss Distance	horizontal : 0 vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

While being vectored for a visual approach, we were told by approach control of traffic that would be crossing behind us and had us in sight. We did not have the traffic visually or on TCASII at that time. As I was descending and turning towards final once cleared for the visual we received a RA and a 'climb' command. I stopped the descent and began a climb as I continued with the turn. On our TCASII display the RA was at an altitude of 4800 ft MSL and we were climbing through 5000 ft. Approach queried the single engine cessna if they still had visual contact with the B-737. After a several second delay, (which indicated to us they had lost sight of us), they then said they saw us at the same time we crossed directly over them at a converging headings. We did not see the single engine cessna until this time. Approach control asked us if we had received an RA and we said we did but they did not indicate whether a near mid-air would be filed on the cessna. Supplemental information from acn 286382: I made visual contact with the cessna just in time to see him pass directly underneath us. Our TCASII indicated his altitude to be 200 ft beneath us. He clearly did not have us in sight or had lost visual contact with us.

Original NASA ASRS Text

Title: TCASII RA.

Narrative: WHILE BEING VECTORED FOR A VISUAL APCH, WE WERE TOLD BY APCH CTL OF TFC THAT WOULD BE XING BEHIND US AND HAD US IN SIGHT. WE DID NOT HAVE THE TFC VISUALLY OR ON TCASII AT THAT TIME. AS I WAS DSNDING AND TURNING TOWARDS FINAL ONCE CLRED FOR THE VISUAL WE RECEIVED A RA AND A 'CLB' COMMAND. I STOPPED THE DSCNT AND BEGAN A CLB AS I CONTINUED WITH THE TURN. ON OUR TCASII DISPLAY THE RA WAS AT AN ALT OF 4800 FT MSL AND WE WERE CLBING THROUGH 5000 FT. APCH QUERIED THE SINGLE ENG CESSNA IF THEY STILL HAD VISUAL CONTACT WITH THE B-737. AFTER A SEVERAL SECOND DELAY, (WHICH INDICATED TO US THEY HAD LOST SIGHT OF US), THEY THEN SAID THEY SAW US AT THE SAME TIME WE CROSSED DIRECTLY OVER THEM AT A CONVERGING HDGS. WE DID NOT SEE THE SINGLE ENG CESSNA UNTIL THIS TIME. APCH CTL ASKED US IF WE HAD RECEIVED AN RA AND WE SAID WE DID BUT THEY DID NOT INDICATE WHETHER A NEAR MID-AIR WOULD BE FILED ON THE CESSNA. SUPPLEMENTAL INFO FROM ACN 286382: I MADE VISUAL CONTACT WITH THE CESSNA JUST IN TIME TO SEE HIM PASS DIRECTLY UNDERNEATH US. OUR TCASII INDICATED HIS ALT TO BE 200 FT BENEATH US. HE CLRLY DID NOT HAVE US IN SIGHT OR HAD LOST VISUAL CONTACT WITH US.

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.