Heading track route deviation on improper departure procedure.

Attributes
ACN	180194
Time
Date	199106
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sea
State Reference	WA
Altitude	msl bound lower : 4000 msl bound upper : 4000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : sea
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude
Route In Use	departure other departure sid : sid
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 : 12000 flight time type : 1200
ASRS Report	180194
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	non adherence : published procedure non adherence : clearance other anomaly other other spatial deviation
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On takeoff out of sea, flying the mountain 2 departure. 'Cross sea 8 DME fix at or above 4000', then turn right to a 070 degree heading.' I was concerned with getting above 4000', and turned after reaching 4000'. Should have read the departure more thoroughly. I turned approximately 30-4 mi early. TCAS was giving us an alert at this time on a non altitude transponder aircraft. Probable reason: copilot did not catch error.

Original NASA ASRS Text

Title: HEADING TRACK ROUTE DEVIATION ON IMPROPER DEP PROC.

Narrative: ON TKOF OUT OF SEA, FLYING THE MOUNTAIN 2 DEP. 'CROSS SEA 8 DME FIX AT OR ABOVE 4000', THEN TURN RIGHT TO A 070 DEG HDG.' I WAS CONCERNED WITH GETTING ABOVE 4000', AND TURNED AFTER REACHING 4000'. SHOULD HAVE READ THE DEP MORE THOROUGHLY. I TURNED APPROX 30-4 MI EARLY. TCAS WAS GIVING US AN ALERT AT THIS TIME ON A NON ALT XPONDER ACFT. PROBABLE REASON: COPLT DID NOT CATCH ERROR.

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.