PIC of a B727 turns early on the sjc departure when he misreads the turn mileage on the chart near s...

Attributes
ACN	509180
Time
Date	200104
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : sjc.airport
State Reference	CA
Altitude	msl bound lower : 1000 msl bound upper : 3000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B757-200
Flight Phase	climbout : initial
Route In Use	departure sid : sjc 8
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 150 flight time total : 5500 flight time type : 700
ASRS Report	509180
Events
Anomaly	non adherence : clearance non adherence : published procedure other spatial deviation
Resolutory Action	none taken : anomaly accepted none taken : detected after the fact
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Departed runway 30L sjc xa 10'clock am. WX -- wind calm (about) 1500 ft ovc. Tops, 3000 ft, clear on top. In clearance we were instructed to fly -- basically fly runway heading to sjc VOR -- go outbound until 1 pt 8 DME from sjc VOR. Turn right heading 110 degrees to intercept oakland right 121 to moony intersection then to avenal VOR (ave). Instead of turning at 1 pt 8 DME we turned at about .2 DME. Aircraft FMS equipped. Captain appeared to look at distance to active waypoint instead of DME from sjc VOR and we turned to heading 110 degrees early to intercept the 121 right from oak. No traffic conflict and no terrain conflicts.

Original NASA ASRS Text

Title: PIC OF A B727 TURNS EARLY ON THE SJC DEP WHEN HE MISREADS THE TURN MILEAGE ON THE CHART NEAR SJC, CA.

Narrative: DEPARTED RWY 30L SJC XA 10'CLOCK AM. WX -- WIND CALM (ABOUT) 1500 FT OVC. TOPS, 3000 FT, CLR ON TOP. IN CLRNC WE WERE INSTRUCTED TO FLY -- BASICALLY FLY RWY HDG TO SJC VOR -- GO OUTBOUND UNTIL 1 PT 8 DME FROM SJC VOR. TURN R HDG 110 DEGS TO INTERCEPT OAKLAND R 121 TO MOONY INTXN THEN TO AVENAL VOR (AVE). INSTEAD OF TURNING AT 1 PT 8 DME WE TURNED AT ABOUT .2 DME. ACFT FMS EQUIPPED. CAPT APPEARED TO LOOK AT DISTANCE TO ACTIVE WAYPOINT INSTEAD OF DME FROM SJC VOR AND WE TURNED TO HDG 110 DEGS EARLY TO INTERCEPT THE 121 R FROM OAK. NO TFC CONFLICT AND NO TERRAIN CONFLICTS.

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.

PIC of a B727 turns early on the sjc departure when he misreads the turn mileage on the chart near sjc, ca.