An air taxi jet crew leveled at FL240 on the BACHR1 RNAV to dal and when cleared via before angst; t...

Attributes
ACN	1255588
Time
Date	201504
Local Time Of Day	1801-2400
Place
Locale Reference	ZFW.ARTCC
State Reference	TX
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Light Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 135
Flight Phase	Descent
Route In Use	STAR BACHR1
Flight Plan	IFR
Component
Aircraft Component	MCP
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 90 Flight Crew Total 11090 Flight Crew Type 40350
Events
Anomaly	Deviation - Altitude Overshoot Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Published Material / Policy Deviation - Procedural Clearance

Narrative:

On the BACHR1 STAR to dallas love field. Fort worth center told us to descend and maintain 24;000 feet. We complied and leveled off at our assigned altitude of FL240. Shortly before the angst fix we were given descend via the arrival. I then set the lowest altitude on the BACHR1 (RNAV) STAR in the altitude select and activated the VNAV I then slowed to the crossing speed restriction of 280kts @FL240. My attention was diverted for no more that a minute. When I saw we had started our descent prematurely and passing below our hard alt of FL240 at angst I disengage the autopilot and stopped the descent. The autopilot and FMS were reset and after that all other fixes were crossed at the appropriate altitudes... (There were no traffic conflicts)..after landing we as a crew discussed what could have been done to prevent this and keep it from ever happening again.

Original NASA ASRS Text

Title: An air taxi jet crew leveled at FL240 on the BACHR1 RNAV to DAL and when cleared VIA before ANGST; the lowest STAR MCP altitude was selected. The aircraft began a descent before the crew realized the error but they recovered to FL240.

Narrative: On the BACHR1 STAR to Dallas Love field. Fort Worth Center told us to descend and maintain 24;000 feet. We complied and leveled off at our assigned altitude of FL240. Shortly before the ANGST fix we were given descend via the arrival. I then set the lowest altitude on the BACHR1 (RNAV) STAR IN the Altitude select and activated the VNAV I then slowed to the crossing speed restriction of 280kts @FL240. My attention was diverted for no more that a minute. When I saw we had started our descent prematurely and passing below our hard alt of FL240 AT ANGST I disengage the autopilot and stopped the descent. The autopilot and FMS were reset and after that all other fixes were crossed at the appropriate altitudes... (THERE WERE NO TRAFFIC CONFLICTS)..After landing we as a crew discussed what could have been done to prevent this and keep it from ever happening again.

Data retrieved from NASA's ASRS site 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.

An air taxi jet crew leveled at FL240 on the BACHR1 RNAV to dal and when cleared via before angst; the lowest STAR MCP altitude was selected. The aircraft began a descent before the crew realized the error but they recovered to FL240.