Widebody transport crew had less than legal separation from an MD80 departing on a parallel runway.

Attributes
ACN	418842
Time
Date	199811
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : bos airport : bos
State Reference	MA
Altitude	msl bound lower : 200 msl bound upper : 200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : bos
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : initial
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	climbout : initial
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 200 flight time total : 18000 flight time type : 4000
ASRS Report	418842
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation non adherence : published procedure
Independent Detector	other flight crewa
Resolutory Action	controller : issued new clearance
Consequence	Other
Miss Distance	horizontal : 5000
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error
Situations
ATC Facility	procedure or policy : unspecified
Airport	other physical facility

Narrative:

Taxied to runway 22L at bos. Cleared into position, then given takeoff clearance while still moving, thus a rolling takeoff. As we got airborne with gear coming up, I noticed an MD80 about 1 mi ahead in a left turn across our path. Tower controller (a new voice) asked if we saw traffic, then vectored us behind traffic until proper separation was achieved. We were then turned over to departure control. The following factors contributed: 1) 2 tower frequencys used for runway 22L and runway 22R (other aircraft departed runway 22R). 2) runway 22R was behind us as we taxied into position on runway 22L. 3) my attention, as we taxied into position on runway 22L, was on traffic landing runway 27 which crosses runway 22L downfield. 4) rolling takeoff makes it less likely to be aware of all other movement on airfield. I am confident that this was a simple controller error, and would not be surprised if original runway 22L controller was a trainee, as there was an immediate instruction from a 'new voice' on tower frequency.

Original NASA ASRS Text

Title: WDB CREW HAD LESS THAN LEGAL SEPARATION FROM AN MD80 DEPARTING ON A PARALLEL RWY.

Narrative: TAXIED TO RWY 22L AT BOS. CLRED INTO POS, THEN GIVEN TKOF CLRNC WHILE STILL MOVING, THUS A ROLLING TKOF. AS WE GOT AIRBORNE WITH GEAR COMING UP, I NOTICED AN MD80 ABOUT 1 MI AHEAD IN A L TURN ACROSS OUR PATH. TWR CTLR (A NEW VOICE) ASKED IF WE SAW TFC, THEN VECTORED US BEHIND TFC UNTIL PROPER SEPARATION WAS ACHIEVED. WE WERE THEN TURNED OVER TO DEP CTL. THE FOLLOWING FACTORS CONTRIBUTED: 1) 2 TWR FREQS USED FOR RWY 22L AND RWY 22R (OTHER ACFT DEPARTED RWY 22R). 2) RWY 22R WAS BEHIND US AS WE TAXIED INTO POS ON RWY 22L. 3) MY ATTN, AS WE TAXIED INTO POS ON RWY 22L, WAS ON TFC LNDG RWY 27 WHICH CROSSES RWY 22L DOWNFIELD. 4) ROLLING TKOF MAKES IT LESS LIKELY TO BE AWARE OF ALL OTHER MOVEMENT ON AIRFIELD. I AM CONFIDENT THAT THIS WAS A SIMPLE CTLR ERROR, AND WOULD NOT BE SURPRISED IF ORIGINAL RWY 22L CTLR WAS A TRAINEE, AS THERE WAS AN IMMEDIATE INSTRUCTION FROM A 'NEW VOICE' ON TWR FREQ.

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.