Close proximity air carrier-large transport GA-small transport in air traffic area at NAS.

Attributes
ACN	153054
Time
Date	199008
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : nas
State Reference	FO
Altitude	msl bound lower : 1100 msl bound upper : 1300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : nas tower : nas
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	descent other landing : go around
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	descent other landing other
Route In Use	approach : visual
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 200 flight time total : 13000 flight time type : 7000
ASRS Report	153054
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	conflict : nmac non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action other
Consequence	Other
Miss Distance	horizontal : 200 vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

Flight was cleared for a visibility approach to runway 14 to follow an air carrier Y large transport Y. Approach advised us to slow to 210 KTS until reaching porgy intersection and to contact tower at porgy. Approach control asked commuter small transport if it had or large transport in sight. Small transport replied it had us in sight. Approach control then issued a clearance to follow our large transport to runway 14 and cleared it for a visibility approach and to contact tower frequency. Approximately 1100' MSL (3 mi from end of runway) we noticed small transport on our left and slightly above us (approximately 200' sep both lateral and vertical) turning from a left base to final. At that point, evasive action was taken by rapidly descending to 800' MSL and accelerating with execution of missed approach. After clearing traffic we climbed up to 2000' MSL and returned to field with no further action or incident. Final remarks, tower did not advise us of traffic or traffic conflict. Tower should be more vigilant on follow through progress of landing traffic. Did not follow the small transport instructions of both approach control or tower.

Original NASA ASRS Text

Title: CLOSE PROX ACR-LGT GA-SMT IN ATA AT NAS.

Narrative: FLT WAS CLRED FOR A VIS APCH TO RWY 14 TO FOLLOW AN ACR Y LGT Y. APCH ADVISED US TO SLOW TO 210 KTS UNTIL REACHING PORGY INTXN AND TO CONTACT TWR AT PORGY. APCH CTL ASKED COMMUTER SMT IF IT HAD OR LGT IN SIGHT. SMT REPLIED IT HAD US IN SIGHT. APCH CTL THEN ISSUED A CLRNC TO FOLLOW OUR LGT TO RWY 14 AND CLRED IT FOR A VIS APCH AND TO CONTACT TWR FREQ. APPROX 1100' MSL (3 MI FROM END OF RWY) WE NOTICED SMT ON OUR L AND SLIGHTLY ABOVE US (APPROX 200' SEP BOTH LATERAL AND VERTICAL) TURNING FROM A L BASE TO FINAL. AT THAT POINT, EVASIVE ACTION WAS TAKEN BY RAPIDLY DSNDING TO 800' MSL AND ACCELERATING WITH EXECUTION OF MISSED APCH. AFTER CLRING TFC WE CLBED UP TO 2000' MSL AND RETURNED TO FIELD WITH NO FURTHER ACTION OR INCIDENT. FINAL REMARKS, TWR DID NOT ADVISE US OF TFC OR TFC CONFLICT. TWR SHOULD BE MORE VIGILANT ON FOLLOW THROUGH PROGRESS OF LNDG TFC. DID NOT FOLLOW THE SMT INSTRUCTIONS OF BOTH APCH CTL OR TWR.

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.