<< >> NASA ASRS Report 123719, September 1989

Flight crew misinterp of SID results in track and altitude deviation and non adherence to ATC clearance.

Attributes
ACN	123719
Time
Date	198909
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : sjc
State Reference	CA
Altitude	msl bound lower : 5000 msl bound upper : 12000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : sjc tower : mli
Operator	common carrier : air taxi
Make Model Name	Small Transport, Low Wing, 2 Turboprop Eng
Flight Phase	climbout : intermediate altitude cruise other cruise other
Route In Use	departure sid : sid enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : flight engineer pilot : commercial pilot : atp pilot : cfi
Experience	flight time last 90 days : 50 flight time total : 4400 flight time type : 500
ASRS Report	123719
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 60 flight time total : 3100 flight time type : 130
ASRS Report	123718
Events
Anomaly	altitude deviation : overshoot non adherence : published procedure non adherence : clearance other anomaly other other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance flight crew : returned to intended course or assigned course other
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Ambiguous
Air Traffic Incident	Pilot Deviation other
Situations
ATC Facility	procedure or policy : unspecified

Narrative:

On departure from runway 30L at sjc, there was confusion between cockpit crew members and ATC about departure procedure. Initial altitude given in clearance was FL230; however, the loupe 6 departure specifies specific crossing altitudes and a turn to 120 degrees to circle back over the VOR before proceeding on course. After sjc departure contacted us and advised us about the altitude restriction and the turn, we got on the correct profile. We will be more careful to determine the correct procedure next time.

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Original NASA ASRS Text

Title: FLT CREW MISINTERP OF SID RESULTS IN TRACK AND ALT DEVIATION AND NON ADHERENCE TO ATC CLRNC.

Narrative: ON DEP FROM RWY 30L AT SJC, THERE WAS CONFUSION BTWN COCKPIT CREW MEMBERS AND ATC ABOUT DEP PROC. INITIAL ALT GIVEN IN CLRNC WAS FL230; HOWEVER, THE LOUPE 6 DEP SPECIFIES SPECIFIC XING ALTS AND A TURN TO 120 DEGS TO CIRCLE BACK OVER THE VOR BEFORE PROCEEDING ON COURSE. AFTER SJC DEP CONTACTED US AND ADVISED US ABOUT THE ALT RESTRICTION AND THE TURN, WE GOT ON THE CORRECT PROFILE. WE WILL BE MORE CAREFUL TO DETERMINE THE CORRECT PROC NEXT TIME.

Data retrieved from NASA's ASRS site as of August 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.