<< >> NASA ASRS Report 634377, October 2004

CL600 crew had a track deviation departing sna on the channel one SID. The crew was unfamiliar with the FMC installed in the aircraft.

Attributes
ACN	634377
Time
Date	200410
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sna.airport
State Reference	CA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : sct.tracon
Operator	general aviation : corporate
Make Model Name	Challenger CL600
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	climbout : intermediate altitude
Route In Use	departure sid : caanl1.sxc
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 120 flight time total : 12000 flight time type : 800
ASRS Report	634377
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Events
Anomaly	non adherence : far non adherence : published procedure non adherence : clearance other spatial deviation
Independent Detector	atc equipment other atc equipment : radar other controllera
Resolutory Action	controller : issued new clearance flight crew : returned to original clearance
Supplementary
Problem Areas	Flight Crew Human Performance Navigational Facility Aircraft
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On departure from sna on the CHANL1.sxc departure we were off course due to several factors. Both pilots were unfamiliar with the FMS. Dual 'Q' flight director guidance. One NAVAID on the departure OTS. After departure the FMS and flight director seemed to disagree. The flight director was asking for a left turn and the CDI needle swung right 80 degrees. After a call to manufacturer I was told that in the older FMS units the CDI needle defaulted to the first hard course and disregarded the headings. We followed the CDI and turned right. Thinking the dual 'Q' flight director (which was left of center) was asking for less bank angle. Departure control asked us to turn back and pick up the departure route and gave us vectors, because sxc VOR was OTS. The newer FMS do not operate this way neither does brand Y equipment.

Related reports:

• Deviation from nascr arrival track is noted by ATC. First of...
• Pc-12 captain reported an altitude and heading deviation due...
• Pilot experiences an altitude deviation due in part to distr...
• GA small aircraft at unfamiliar airport misses assigned taxi...
• GA pilot has altitude deviation and possible class D entry w...

	Enter your search terms Submit search form
	Web www.37000feet.com

Original NASA ASRS Text

Title: CL600 CREW HAD A TRACK DEV DEPARTING SNA ON THE CHANNEL ONE SID. THE CREW WAS UNFAMILIAR WITH THE FMC INSTALLED IN THE ACFT.

Narrative: ON DEP FROM SNA ON THE CHANL1.SXC DEP WE WERE OFF COURSE DUE TO SEVERAL FACTORS. BOTH PLTS WERE UNFAMILIAR WITH THE FMS. DUAL 'Q' FLT DIRECTOR GUIDANCE. ONE NAVAID ON THE DEP OTS. AFTER DEP THE FMS AND FLT DIRECTOR SEEMED TO DISAGREE. THE FLT DIRECTOR WAS ASKING FOR A L TURN AND THE CDI NEEDLE SWUNG R 80 DEGS. AFTER A CALL TO MANUFACTURER I WAS TOLD THAT IN THE OLDER FMS UNITS THE CDI NEEDLE DEFAULTED TO THE FIRST HARD COURSE AND DISREGARDED THE HDGS. WE FOLLOWED THE CDI AND TURNED R. THINKING THE DUAL 'Q' FLT DIRECTOR (WHICH WAS L OF CTR) WAS ASKING FOR LESS BANK ANGLE. DEP CTL ASKED US TO TURN BACK AND PICK UP THE DEP RTE AND GAVE US VECTORS, BECAUSE SXC VOR WAS OTS. THE NEWER FMS DO NOT OPERATE THIS WAY NEITHER DOES BRAND Y EQUIP.

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.