A falcon 20 on wylyy departure from bos deviate from the charted track.

Attributes
ACN	714672
Time
Date	200610
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : bos.airport
State Reference	MA
Altitude	agl single value : 1000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : a90.tracon
Operator	general aviation : corporate
Make Model Name	Falcon 20FJF/20C/20D/20E/20F
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	climbout : initial
Route In Use	departure sid : wylyy.5
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 80 flight time total : 8000 flight time type : 700
ASRS Report	714672
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Events
Anomaly	non adherence : published procedure non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On a deadhead leg back to base with the first officer in the left seat; we flew runway heading off of runway 27 on the wylyy 5 RNAV departure that calls for a left turn swbound towards the first fix. The end of a long day; a seat swap; and nighttime conditions with the captain running after takeoff checklists; resulted in being queried by bos departure control of our heading. Upon realizing we neglected to follow the SID; we notified the controller of our 270 degree heading and were given alternate vectors and complied. Our part 135 operation are not approved for RNAV sids and stars. Our first mistake was accepting the SID; even as a 91 repos. Our non compliance would have been alleviated had both pilots been attentive to the improper flight path as well as the selection of the FMS as guidance by the PF. A more in depth briefing of the requirements of an RNAV departure and strict compliance with company SOP's would have been appropriate.

Original NASA ASRS Text

Title: A FALCON 20 ON WYLYY DEP FROM BOS DEVIATE FROM THE CHARTED TRACK.

Narrative: ON A DEADHEAD LEG BACK TO BASE WITH THE FO IN THE L SEAT; WE FLEW RWY HDG OFF OF RWY 27 ON THE WYLYY 5 RNAV DEP THAT CALLS FOR A L TURN SWBOUND TOWARDS THE FIRST FIX. THE END OF A LONG DAY; A SEAT SWAP; AND NIGHTTIME CONDITIONS WITH THE CAPT RUNNING AFTER TKOF CHKLISTS; RESULTED IN BEING QUERIED BY BOS DEP CTL OF OUR HDG. UPON REALIZING WE NEGLECTED TO FOLLOW THE SID; WE NOTIFIED THE CTLR OF OUR 270 DEG HDG AND WERE GIVEN ALTERNATE VECTORS AND COMPLIED. OUR PART 135 OP ARE NOT APPROVED FOR RNAV SIDS AND STARS. OUR FIRST MISTAKE WAS ACCEPTING THE SID; EVEN AS A 91 REPOS. OUR NON COMPLIANCE WOULD HAVE BEEN ALLEVIATED HAD BOTH PLTS BEEN ATTENTIVE TO THE IMPROPER FLT PATH AS WELL AS THE SELECTION OF THE FMS AS GUIDANCE BY THE PF. A MORE IN DEPTH BRIEFING OF THE REQUIREMENTS OF AN RNAV DEP AND STRICT COMPLIANCE WITH COMPANY SOP'S WOULD HAVE BEEN APPROPRIATE.

Data retrieved from NASA's ASRS site as of January 2009 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.