Air carrier X TCASII TA with VFR C150 in class D airspace evasive action turn descent. See and avoid...

Attributes
ACN	294541
Time
Date	199501
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : eyw
State Reference	FL
Altitude	agl bound lower : 1500 agl bound upper : 1500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : nqx tower : eyw
Operator	common carrier : air carrier
Make Model Name	Dash 8 Series Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent : approach
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Cessna 150
Operating Under FAR Part	Part 91
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 300 flight time total : 10000 flight time type : 6000
ASRS Report	294541
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	conflict : airborne less severe non adherence : published procedure
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 5000 vertical : 500
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Inter Facility Coordination Failure other

Narrative:

Nqx approach cleared X for visual runway 27 at eyw. Have had previous serious similar problems with following scenario, lack of coordination on traffic conflicts between nqx and eyw. Nqx handed us off to eyw tower while on a 5 mi right base for runway 27 at eyw about to extend gear at 1500 ft AGL, and spotted on TCASII converging traffic, 3 mi ahead at same altitude (15 seconds ahead, approximately). Performed positive evasive action prior to RA. Not forewarned of this transiting airplane, in direct conflict with traffic pattern flow by either facility. Without TCASII, would not have normally expected, or perhaps not seen this potential midair hazard. The 500 ft/5000 ft warning was after evasive action. The C-150, incredibly, was cleared by nqx approach to transition air traffic area. Eyw tower had no knowledge of C-150, and assumed approach appraised us of them.

Original NASA ASRS Text

Title: ACR X TCASII TA WITH VFR C150 IN CLASS D AIRSPACE EVASIVE ACTION TURN DSCNT. SEE AND AVOID CONCEPT.

Narrative: NQX APCH CLRED X FOR VISUAL RWY 27 AT EYW. HAVE HAD PREVIOUS SERIOUS SIMILAR PROBS WITH FOLLOWING SCENARIO, LACK OF COORD ON TFC CONFLICTS BTWN NQX AND EYW. NQX HANDED US OFF TO EYW TWR WHILE ON A 5 MI R BASE FOR RWY 27 AT EYW ABOUT TO EXTEND GEAR AT 1500 FT AGL, AND SPOTTED ON TCASII CONVERGING TFC, 3 MI AHEAD AT SAME ALT (15 SECONDS AHEAD, APPROX). PERFORMED POSITIVE EVASIVE ACTION PRIOR TO RA. NOT FOREWARNED OF THIS TRANSITING AIRPLANE, IN DIRECT CONFLICT WITH TFC PATTERN FLOW BY EITHER FACILITY. WITHOUT TCASII, WOULD NOT HAVE NORMALLY EXPECTED, OR PERHAPS NOT SEEN THIS POTENTIAL MIDAIR HAZARD. THE 500 FT/5000 FT WARNING WAS AFTER EVASIVE ACTION. THE C-150, INCREDIBLY, WAS CLRED BY NQX APCH TO TRANSITION ATA. EYW TWR HAD NO KNOWLEDGE OF C-150, AND ASSUMED APCH APPRAISED US OF THEM.

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 with VFR C150 in class D airspace evasive action turn descent. See and avoid concept.