B727 initiates TCASII maneuver while on approach vector in WX en route to pit.

Attributes
ACN	500080
Time
Date	200101
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : mmj.vortac
State Reference	PA
Altitude	msl single value : 10000
Environment
Flight Conditions	IMC
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : pit.tracon
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	arrival star : nesto
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 210 flight time total : 16500 flight time type : 1000
ASRS Report	500080
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : multi engine
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe inflight encounter : weather non adherence : published procedure non adherence : required legal separation
Independent Detector	aircraft equipment : tcas other controllera other flight crewa
Resolutory Action	controller : issued new clearance
Miss Distance	horizontal : 600 vertical : 400
Supplementary
Problem Areas	ATC Human Performance Weather
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Being vectored to join arrival into pit, noted intruder on TCASII 500 ft above, descending. We were to slow to 210 KTS, then descend to 6000 ft. RA commanded descent, we complied. Controller issued 30 degree left turn and expedite descent to 6000 ft. Never saw traffic.

Original NASA ASRS Text

Title: B727 INITIATES TCASII MANEUVER WHILE ON APCH VECTOR IN WX ENRTE TO PIT.

Narrative: BEING VECTORED TO JOIN ARR INTO PIT, NOTED INTRUDER ON TCASII 500 FT ABOVE, DSNDING. WE WERE TO SLOW TO 210 KTS, THEN DSND TO 6000 FT. RA COMMANDED DSCNT, WE COMPLIED. CTLR ISSUED 30 DEG L TURN AND EXPEDITE DSCNT TO 6000 FT. NEVER SAW TFC.

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.