B733 flight crew incorrectly input FMS sea departure SID and turned early from assigned route.

Attributes
ACN	509003
Time
Date	200104
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sea.airport
State Reference	WA
Altitude	msl single value : 1000
Environment
Flight Conditions	VMC VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : s46.tracon
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Navigation In Use	other Other
Flight Phase	climbout : initial
Route In Use	departure : on vectors departure sid : bluit 3
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time type : 1685
ASRS Report	509003
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
ASRS Report	509000
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Pre departure clearance cleared via bluit 3 departure J90 mwh. Route was not crosschecked after receiving pre departure clearance and we neglected to load bluit 3 departure in the FMC (but we had bluit as the first fix after sea). Briefed using LNAV as roll mode at 400 ft. Captain's leg to fly. During 10 min taxi out, we needed to get passenger recount from flight attendants due to discrepancy between flight attendant count and manifest final numbers. We did not notice lack of SID in FMC during before takeoff checklist. After takeoff we ended up turning direct to bluit prior to 5.5 NM fix on SID. Departure controller on frequency 119.2 advised us that we turned early and gave us a 030 degree vector for the climb. Departure control made no other communications to us regarding the early turn. Supplemental information from acn 509000: had FMC course on PNF (first officer) set 158 yet stayed in automatic because thought was better for automatic-updating for FMC departure. After takeoff at 400 ft, LNAV selected and followed FMC without adequate xchk of SID. Our bust. Classic case of crew being slightly more relaxed due to experience level in cockpit. Assumptions made that should not have been assuming too much. The other guy has got it. Good reality check for all involved.

Original NASA ASRS Text

Title: B733 FLC INCORRECTLY INPUT FMS SEA DEP SID AND TURNED EARLY FROM ASSIGNED RTE.

Narrative: PDC CLRED VIA BLUIT 3 DEP J90 MWH. RTE WAS NOT XCHKED AFTER RECEIVING PDC AND WE NEGLECTED TO LOAD BLUIT 3 DEP IN THE FMC (BUT WE HAD BLUIT AS THE FIRST FIX AFTER SEA). BRIEFED USING LNAV AS ROLL MODE AT 400 FT. CAPT'S LEG TO FLY. DURING 10 MIN TAXI OUT, WE NEEDED TO GET PAX RECOUNT FROM FLT ATTENDANTS DUE TO DISCREPANCY BTWN FLT ATTENDANT COUNT AND MANIFEST FINAL NUMBERS. WE DID NOT NOTICE LACK OF SID IN FMC DURING BEFORE TKOF CHKLIST. AFTER TKOF WE ENDED UP TURNING DIRECT TO BLUIT PRIOR TO 5.5 NM FIX ON SID. DEP CTLR ON FREQ 119.2 ADVISED US THAT WE TURNED EARLY AND GAVE US A 030 DEG VECTOR FOR THE CLB. DEP CTL MADE NO OTHER COMS TO US REGARDING THE EARLY TURN. SUPPLEMENTAL INFO FROM ACN 509000: HAD FMC COURSE ON PNF (FO) SET 158 YET STAYED IN AUTO BECAUSE THOUGHT WAS BETTER FOR AUTO-UPDATING FOR FMC DEP. AFTER TKOF AT 400 FT, LNAV SELECTED AND FOLLOWED FMC WITHOUT ADEQUATE XCHK OF SID. OUR BUST. CLASSIC CASE OF CREW BEING SLIGHTLY MORE RELAXED DUE TO EXPERIENCE LEVEL IN COCKPIT. ASSUMPTIONS MADE THAT SHOULD NOT HAVE BEEN ASSUMING TOO MUCH. THE OTHER GUY HAS GOT IT. GOOD REALITY CHK FOR ALL INVOLVED.

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.