Air carrier X TCASII TA RA with unknown VFR aircraft. TCASII faulty logic evasive action climb into ...

Attributes
ACN	294254
Time
Date	199501
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : sju
State Reference	PR
Altitude	msl bound lower : 2700 msl bound upper : 2700
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : sju
Operator	common carrier : air carrier
Make Model Name	A300
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 91
Flight Phase	cruise other
Route In Use	enroute : direct
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	294254
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	conflict : airborne less severe other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	none taken : anomaly accepted
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 6000 vertical : 700
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

During approach vectoring approximately 15 mi west of sju on frequency 119.4, TCASII advised traffic immediately followed by RA to climb at 2000 FPM. Traffic was plus 7 at approximately 1 mi at our 11:30 position. Next RA was descend at 2000 FPM. While passing through 2700 ft, separation indicated plus 5. Complete occurrence took place in thick clouds with bases at about 220 ft. Debrief with supervisor sju approach control indicated the situation was a somewhat common occurrence. I rate it as a situation that may develop into an accident if procedures and requirements are continued as they presently exist. Callback conversation with reporter revealed the following information: reporter stated he was the captain, not flying. TA was received prior to RA. Controller had not issued traffic and flight crew did not inquire about traffic. First officer refused to follow RA because it would have climbed the aircraft into the traffic. TRACON supervisor did not state whether the traffic was IFR or VFR and the reporter did not ask. Reporter stated flight crew did not inform controller about RA until on the ground during flight crew ATC review.

Original NASA ASRS Text

Title: ACR X TCASII TA RA WITH UNKNOWN VFR ACFT. TCASII FAULTY LOGIC EVASIVE ACTION CLB INTO TFC.

Narrative: DURING APCH VECTORING APPROX 15 MI W OF SJU ON FREQ 119.4, TCASII ADVISED TFC IMMEDIATELY FOLLOWED BY RA TO CLB AT 2000 FPM. TFC WAS PLUS 7 AT APPROX 1 MI AT OUR 11:30 POS. NEXT RA WAS DSND AT 2000 FPM. WHILE PASSING THROUGH 2700 FT, SEPARATION INDICATED PLUS 5. COMPLETE OCCURRENCE TOOK PLACE IN THICK CLOUDS WITH BASES AT ABOUT 220 FT. DEBRIEF WITH SUPVR SJU APCH CTL INDICATED THE SIT WAS A SOMEWHAT COMMON OCCURRENCE. I RATE IT AS A SIT THAT MAY DEVELOP INTO AN ACCIDENT IF PROCS AND REQUIREMENTS ARE CONTINUED AS THEY PRESENTLY EXIST. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED HE WAS THE CAPT, NOT FLYING. TA WAS RECEIVED PRIOR TO RA. CTLR HAD NOT ISSUED TFC AND FLC DID NOT INQUIRE ABOUT TFC. FO REFUSED TO FOLLOW RA BECAUSE IT WOULD HAVE CLBED THE ACFT INTO THE TFC. TRACON SUPVR DID NOT STATE WHETHER THE TFC WAS IFR OR VFR AND THE RPTR DID NOT ASK. RPTR STATED FLC DID NOT INFORM CTLR ABOUT RA UNTIL ON THE GND DURING FLC ATC REVIEW.

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.

Air carrier X TCASII TA RA with unknown VFR aircraft. TCASII faulty logic evasive action climb into traffic.