<< >> NASA ASRS Report 1465181, July 2015

CL60 flight crew reported receiving a low altitude alert from the GPWS and ATC on approach to teb due to a clearance miscommunication.

Attributes
ACN	1465181
Time
Date	201507
Local Time Of Day	0001-0600
Place
Locale Reference	TEB.Airport
State Reference	NJ
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Make Model Name	Challenger CL600
Operating Under FAR Part	Part 91
Flight Phase	Initial Approach
Route In Use	Vectors STAR LVZ4
Flight Plan	IFR
Person 1
Function	First Officer Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 120 Flight Crew Total 4400 Flight Crew Type 340
Person 2
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 129 Flight Crew Type 483
Events
Anomaly	ATC Issue All Types Deviation - Altitude Overshoot Deviation - Procedural Clearance Inflight Event / Encounter CFTT / CFIT

Narrative:

On the LVZ4 arrival at; we were assigned a heading and altitude of 2000 after passing mugzy waypoint. Descending through 3000 and approaching 2300 we received a low attitude alert; 'caution terrain'; from the GPWS. New york approach queried us seconds before the altitude alert saying 'aircraft X maintain 3000'. The autopilot was disconnected; power was added; and a climb to 3000 was accomplished. We told new york approach that we were last assigned; and read back; 2000. We acknowledged the 3000 with a read back; the autopilot was re-engaged; and no further action was taken.

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Original NASA ASRS Text

Title: CL60 flight crew reported receiving a low altitude alert from the GPWS and ATC on approach to TEB due to a clearance miscommunication.

Narrative: On the LVZ4 arrival at; we were assigned a heading and altitude of 2000 after passing MUGZY waypoint. Descending through 3000 and approaching 2300 we received a low attitude alert; 'caution terrain'; from the GPWS. New York approach queried us seconds before the altitude alert saying 'Aircraft X maintain 3000'. The autopilot was disconnected; power was added; and a climb to 3000 was accomplished. We told New York approach that we were last assigned; and read back; 2000. We acknowledged the 3000 with a read back; the autopilot was re-engaged; and no further action was taken.

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.