Altitude deviation altitude undershot in a non adherence to ATC clearance.

Attributes
ACN	246442
Time
Date	199307
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : pvd
State Reference	RI
Altitude	msl bound lower : 3000 msl bound upper : 5000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : pvd
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent other
Route In Use	approach : visual enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 200 flight time total : 7000 flight time type : 600
ASRS Report	246442
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : undershoot conflict : airborne less severe non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 12000 vertical : 500
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

Level at 5000 ft ocean approach cleared us to descend to 3000 ft to set up for the visual to runway 34 pvd. Descending through 4000 ft we got a TCASII warning and the command to climb. We notified ocean approach of our intentions and that we were climbing due to a TCASII warning. They acknowledged and called traffic off our right side approximately 2 mi. We did not see the traffic. Clear of conflict command on TCASII approaching 5000 ft. We were then reclred for the visual to runway 34 at pvd and uneventful landing. We talked to the approach control supervisor, said no reports required. If they would have called the VFR traffic earlier, it may have prevented our surprise.

Original NASA ASRS Text

Title: ALTDEV ALT UNDERSHOT IN A NON ADHERENCE TO ATC CLRNC.

Narrative: LEVEL AT 5000 FT OCEAN APCH CLRED US TO DSND TO 3000 FT TO SET UP FOR THE VISUAL TO RWY 34 PVD. DSNDING THROUGH 4000 FT WE GOT A TCASII WARNING AND THE COMMAND TO CLB. WE NOTIFIED OCEAN APCH OF OUR INTENTIONS AND THAT WE WERE CLBING DUE TO A TCASII WARNING. THEY ACKNOWLEDGED AND CALLED TFC OFF OUR R SIDE APPROX 2 MI. WE DID NOT SEE THE TFC. CLR OF CONFLICT COMMAND ON TCASII APCHING 5000 FT. WE WERE THEN RECLRED FOR THE VISUAL TO RWY 34 AT PVD AND UNEVENTFUL LNDG. WE TALKED TO THE APCH CTL SUPVR, SAID NO RPTS REQUIRED. IF THEY WOULD HAVE CALLED THE VFR TFC EARLIER, IT MAY HAVE PREVENTED OUR SURPRISE.

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.