MD88 flight crew expressed concern regarding visual separation application during departure from abe, as a DHC8 was vectored behind causing a TCASII alert.

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Attributes
ACN	611977
Time
Date	200403
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : abe.airport
State Reference	PA
Altitude	msl single value : 4000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : abe.tracon
Operator	common carrier : air carrier
Make Model Name	MD-88
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : abe.tracon
Operator	common carrier : air carrier
Make Model Name	Dash 8 Series Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude climbout : initial
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 5200 flight time type : 200
ASRS Report	611997
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne less severe non adherence : published procedure
Independent Detector	aircraft equipment : tcas other flight crewa
Resolutory Action	controller : issued advisory controller : issued new clearance
Miss Distance	horizontal : 9000
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance

Narrative:

MD88 departed abe on runway 24 after DHC8 had departed runway 31. Level at 3000 ft, MD88 was asked if they had a visual on DH8 at 4000 ft. Both aircraft were then on 240 degree heading. MD88 crew replied they did and were told to maintain visual separation and climb to 8000 ft. MD88 commenced to climb, then controller turned DHC8 to a heading of south, TCASII gave TA/RA. Crew still had DHC8 visually as it passed 1 1/2 mi to the rear of MD88. MD88 was not expecting controller to turn DHC8 after giving MD80 clearance to climb.

Original NASA ASRS Text

Title: MD88 FLT CREW EXPRESSED CONCERN REGARDING VISUAL SEPARATION APPLICATION DURING DEP FROM ABE, AS A DHC8 WAS VECTORED BEHIND CAUSING A TCASII ALERT.

Narrative: MD88 DEPARTED ABE ON RWY 24 AFTER DHC8 HAD DEPARTED RWY 31. LEVEL AT 3000 FT, MD88 WAS ASKED IF THEY HAD A VISUAL ON DH8 AT 4000 FT. BOTH ACFT WERE THEN ON 240 DEG HDG. MD88 CREW REPLIED THEY DID AND WERE TOLD TO MAINTAIN VISUAL SEPARATION AND CLB TO 8000 FT. MD88 COMMENCED TO CLB, THEN CTLR TURNED DHC8 TO A HDG OF S, TCASII GAVE TA/RA. CREW STILL HAD DHC8 VISUALLY AS IT PASSED 1 1/2 MI TO THE REAR OF MD88. MD88 WAS NOT EXPECTING CTLR TO TURN DHC8 AFTER GIVING MD80 CLRNC TO CLB.

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.