B757 crew had track deviation at bos.

Attributes
ACN	450520
Time
Date	199909
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : bos.airport
State Reference	MA
Altitude	msl single value : 1000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : a90.tracon
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : initial
Route In Use	departure sid : n/s
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 20000 flight time type : 2300
ASRS Report	450520
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : multi engine pilot : commercial
Events
Anomaly	non adherence : published procedure non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance controller : issued alert none taken : detected after the fact
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Runway 9 was the departure runway but because of weight and performance numbers, I requested runway 4R. Approval was given before taxiing to runway 9. Because of landing traffic on runway 4R, clearance to take off was given rather quickly. All checks were done with ample time, but because of the runway change, we understood we were to fly the runway heading, and we did. After takeoff departure control said they had expected us to fly the original SID, which called for a right turn. No conflicts or other problems were encountered and we were given a left turn on course. That was the end of the situation. My recommendation: when there is a runway change, the tower should restate the desired departure instructions.

Original NASA ASRS Text

Title: B757 CREW HAD TRACK DEV AT BOS.

Narrative: RWY 9 WAS THE DEP RWY BUT BECAUSE OF WT AND PERFORMANCE NUMBERS, I REQUESTED RWY 4R. APPROVAL WAS GIVEN BEFORE TAXIING TO RWY 9. BECAUSE OF LNDG TFC ON RWY 4R, CLRNC TO TAKE OFF WAS GIVEN RATHER QUICKLY. ALL CHKS WERE DONE WITH AMPLE TIME, BUT BECAUSE OF THE RWY CHANGE, WE UNDERSTOOD WE WERE TO FLY THE RWY HEADING, AND WE DID. AFTER TKOF DEP CTL SAID THEY HAD EXPECTED US TO FLY THE ORIGINAL SID, WHICH CALLED FOR A R TURN. NO CONFLICTS OR OTHER PROBS WERE ENCOUNTERED AND WE WERE GIVEN A L TURN ON COURSE. THAT WAS THE END OF THE SIT. MY RECOMMENDATION: WHEN THERE IS A RWY CHANGE, THE TWR SHOULD RESTATE THE DESIRED DEP INSTRUCTIONS.

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.