Corporate jet flight crew deviated from FMG7 departure out of rno due to FMS 'early turn' feature.

Attributes
ACN	1025568
Time
Date	201207
Local Time Of Day	0601-1200
Place
Locale Reference	RNO.Airport
State Reference	NV
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Medium Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 91
Flight Phase	Initial Climb
Route In Use	SID FMG7
Flight Plan	IFR
Component
Aircraft Component	FMS/FMC
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 74 Flight Crew Total 7000 Flight Crew Type 500
Person 2
Function	Pilot Not Flying Captain
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor
Events
Anomaly	Deviation - Procedural Published Material / Policy Deviation - Procedural Clearance Deviation - Track / Heading All Types

Narrative:

After taking off runway 16L (rno) on the mustang 7 departure (FMG7); we made a left turn following the FMS flight director toward the fmg VOR. Rno tower asked if we had the terrain in sight. We acknowledged that we did. Tower also advised us that the FMG7 was a '3DME turn.' this waypoint is depicted on the FMG7 chart as i-rno 3 DME on localizer frequency 110.9 or rijtu. It was at this point that we realized we had turned approximately 1 mile before rijtu and about 1;600 ft below the charted altitude of 10;000 ft. I believe that following the FMS FD guidance (which has an early turn-in feature to prevent excessive turn rates) instead of the depicted routing led to an early turn toward fmg VOR before reaching 10;000 ft. We were above the MEA at all segments and at no time were we in any conflict of traffic or terrain. To have prevented this; we should have cross-referenced the localizer DME and made sure we were at our charted waypoint and altitude prior to making our turn and not solely relying on FMS automation.

Original NASA ASRS Text

Title: Corporate jet flight crew deviated from FMG7 Departure out of RNO due to FMS 'early turn' feature.

Narrative: After taking off Runway 16L (RNO) on the Mustang 7 Departure (FMG7); we made a left turn following the FMS flight director toward the FMG VOR. RNO Tower asked if we had the terrain in sight. We acknowledged that we did. Tower also advised us that the FMG7 was a '3DME turn.' This waypoint is depicted on the FMG7 chart as I-RNO 3 DME on LOC frequency 110.9 or RIJTU. It was at this point that we realized we had turned approximately 1 mile before RIJTU and about 1;600 FT below the charted altitude of 10;000 FT. I believe that following the FMS FD guidance (which has an early turn-in feature to prevent excessive turn rates) instead of the depicted routing led to an early turn toward FMG VOR before reaching 10;000 FT. We were above the MEA at all segments and at no time were we in any conflict of traffic or terrain. To have prevented this; we should have cross-referenced the LOC DME and made sure we were at our charted waypoint and altitude prior to making our turn and not solely relying on FMS automation.

Data retrieved from NASA's ASRS site as of July 2013 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.