CL600 first officer reports becoming distracted during vectors for the ILS6 at teb; by turbulence an...

Attributes
ACN	1256286
Time
Date	201504
Local Time Of Day	0601-1200
Place
Locale Reference	TEB.Airport
State Reference	NJ
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Challenger CL600
Operating Under FAR Part	Part 91
Flight Phase	Initial Approach
Route In Use	Vectors
Flight Plan	IFR
Person 1
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument
Experience	Flight Crew Last 90 Days 50 Flight Crew Total 5000 Flight Crew Type 90
Events
Anomaly	Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Inflight Event / Encounter CFTT / CFIT Inflight Event / Encounter Weather / Turbulence
Miss Distance	Horizontal 0 Vertical 450

Narrative:

While being vectored on the ILS 6 into teb we were given a descent clearance to 3;000 feet. In the descent we were also given a traffic advisory report at our 2 to 3 o'clock. As we were looking for the traffic we received a GPWS [TCAS] 'TA'. About the time we received the GPWS warning we noticed our aircraft was 450 feet low. We immediately climbed back to 3;000 feet. We continued the ILS 6 with no further issues and landed safely at teb. The reason the deviation occurred was due to a break down in CRM. Training SOP's are very clear that as a non-flying pilot sets a new altitude in the altitude selector the flying pilot then verbally verifies the new altitude. Both pilots then verbally verify the new altitude as 'armed'. In the heat of being vectored at a low altitude in turbulence into a busy airspace while looking for close proximity aircraft we both got distracted and did not verify the 'armed' portion of that SOP. Looking forward; following the training SOP's will be the main focus for every flight to keep this from ever happening again.

Original NASA ASRS Text

Title: CL600 First Officer reports becoming distracted during vectors for the ILS6 at TEB; by turbulence and nearby traffic. During descent to 3;000 feet the new altitude is set in the alerter but not armed; resulting in a 450 foot deviation below 3;000 feet.

Narrative: While being vectored on the ILS 6 into TEB we were given a descent clearance to 3;000 feet. In the descent we were also given a traffic advisory report at our 2 to 3 o'clock. As we were looking for the traffic we received a GPWS [TCAS] 'TA'. About the time we received the GPWS warning we noticed our aircraft was 450 feet low. We immediately climbed back to 3;000 feet. We continued the ILS 6 with no further issues and landed safely at TEB. The reason the deviation occurred was due to a break down in CRM. Training SOP's are very clear that as a non-flying pilot sets a new altitude in the altitude selector the flying pilot then verbally verifies the new altitude. Both pilots then verbally verify the new altitude as 'armed'. In the heat of being vectored at a low altitude in turbulence into a busy airspace while looking for close proximity aircraft we both got distracted and did not verify the 'armed' portion of that SOP. Looking forward; following the training SOP's will be the main focus for every flight to keep this 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.

CL600 first officer reports becoming distracted during vectors for the ILS6 at teb; by turbulence and nearby traffic. During descent to 3;000 feet the new altitude is set in the alerter but not armed; resulting in a 450 foot deviation below 3;000 feet.