Air carrier X TCASII RA on final approach evasive action taken from air carrier Y. Non adherence to ...

Attributes
ACN	241799
Time
Date	199305
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : bos
State Reference	MA
Altitude	msl bound lower : 2000 msl bound upper : 2000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : bos
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Navigation In Use	Other
Flight Phase	descent : approach
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent : approach
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Experience	flight time last 90 days : 200 flight time total : 10000 flight time type : 7000
ASRS Report	241799
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance other spatial deviation
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	controller : issued new clearance flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 2000 vertical : 500
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

Air carrier X cleared for approach 12 DME out, runway 27. Air carrier Y was asked by approach control if he could make short approach to runway 27 when he was on downwind north of the field. He replied that he could. Air carrier X was asked to slow to speed 210 KTS, then 180 KTS, then 150 KTS, which we did, but at that time the TCASII went off. Air carrier X said that this idea was not going to work out. TCASII indicated a climb be performed at which we did. Bos control wanted air carrier X to descend to 2000 ft. At that time air carrier X made a right climbing turn when air carrier Y flew dangerously close in front. Air carrier X made a right 360 degree turn at 2500 ft AGL to reintercept ILS runway 27 at bos. I feel the controller at ZBW was wrong with trying to fit 2 aircraft into the same space at same time. This was a very unsafe situation for both carriers. Air carrier X was flying into the sun and air carrier Y away. Air carrier Y should have declined the question and extended his downwind leg. I also feel maybe some retraining is in order for that specific controller.

Original NASA ASRS Text

Title: ACR X TCASII RA ON FINAL APCH EVASIVE ACTION TAKEN FROM ACR Y. NON ADHERENCE TO ATC INSTRUCTION.

Narrative: ACR X CLRED FOR APCH 12 DME OUT, RWY 27. ACR Y WAS ASKED BY APCH CTL IF HE COULD MAKE SHORT APCH TO RWY 27 WHEN HE WAS ON DOWNWIND N OF THE FIELD. HE REPLIED THAT HE COULD. ACR X WAS ASKED TO SLOW TO SPD 210 KTS, THEN 180 KTS, THEN 150 KTS, WHICH WE DID, BUT AT THAT TIME THE TCASII WENT OFF. ACR X SAID THAT THIS IDEA WAS NOT GOING TO WORK OUT. TCASII INDICATED A CLB BE PERFORMED AT WHICH WE DID. BOS CTL WANTED ACR X TO DSND TO 2000 FT. AT THAT TIME ACR X MADE A R CLBING TURN WHEN ACR Y FLEW DANGEROUSLY CLOSE IN FRONT. ACR X MADE A R 360 DEG TURN AT 2500 FT AGL TO REINTERCEPT ILS RWY 27 AT BOS. I FEEL THE CTLR AT ZBW WAS WRONG WITH TRYING TO FIT 2 ACFT INTO THE SAME SPACE AT SAME TIME. THIS WAS A VERY UNSAFE SIT FOR BOTH CARRIERS. ACR X WAS FLYING INTO THE SUN AND ACR Y AWAY. ACR Y SHOULD HAVE DECLINED THE QUESTION AND EXTENDED HIS DOWNWIND LEG. I ALSO FEEL MAYBE SOME RETRAINING IS IN ORDER FOR THAT SPECIFIC CTLR.

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 RA on final approach evasive action taken from air carrier Y. Non adherence to ATC instruction.