D328 crew had a TCASII RA with an MD80 in pit class B.

Attributes
ACN	512610
Time
Date	200105
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : pit.airport
State Reference	PA
Altitude	msl bound lower : 4000 msl bound upper : 5300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Do 328 TP (Turboprop)
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : pit.tracon
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Flight Phase	descent : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : instrument pilot : flight engineer pilot : commercial pilot : atp
Experience	flight time last 90 days : 200 flight time total : 8500 flight time type : 4000
ASRS Report	512610
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : required legal separation non adherence : published procedure non adherence : clearance non adherence : far non adherence : company policies other anomaly other
Resolutory Action	controller : issued alert controller : issued new clearance controller : separated traffic flight crew : returned to assigned altitude
Miss Distance	horizontal : 3000 vertical : 700
Supplementary
Problem Areas	ATC Human Performance Company Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

My first officer and I were level at 4000 ft approximately 10 mins after departure from pit. We were both wearing headsets and I was hand flying. Our flight number was abcd and abef was 10 mi ahead of us. My first officer and I both thought that we were cleared to 11000 ft, and I initiated a climb from 4000 to 11000 ft. During the climb, I noticed a jet descending toward my flight path. I remarked to the first officer that this did not look right, and shallowed out my climb. I received a TCASII traffic advisory (TA) and leveled off. I received an RA, and reduced power and started a descent. ATC then came on the frequency and said 'descend to 4000 ft immediately', and we did. I called ATC on the ground, and they told me that they had cleared abef not us. We came within 700 ft of the traffic. (Vertically).

Original NASA ASRS Text

Title: D328 CREW HAD A TCASII RA WITH AN MD80 IN PIT CLASS B.

Narrative: MY FO AND I WERE LEVEL AT 4000 FT APPROX 10 MINS AFTER DEP FROM PIT. WE WERE BOTH WEARING HEADSETS AND I WAS HAND FLYING. OUR FLT NUMBER WAS ABCD AND ABEF WAS 10 MI AHEAD OF US. MY FO AND I BOTH THOUGHT THAT WE WERE CLRED TO 11000 FT, AND I INITIATED A CLB FROM 4000 TO 11000 FT. DURING THE CLB, I NOTICED A JET DSNDING TOWARD MY FLT PATH. I REMARKED TO THE FO THAT THIS DID NOT LOOK RIGHT, AND SHALLOWED OUT MY CLB. I RECEIVED A TCASII TFC ADVISORY (TA) AND LEVELED OFF. I RECEIVED AN RA, AND REDUCED PWR AND STARTED A DSCNT. ATC THEN CAME ON THE FREQ AND SAID 'DSND TO 4000 FT IMMEDIATELY', AND WE DID. I CALLED ATC ON THE GROUND, AND THEY TOLD ME THAT THEY HAD CLRED ABEF NOT US. WE CAME WITHIN 700 FT OF THE TFC. (VERTICALLY).

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.