Medium large transport has TCASII RA to climb.

Attributes
ACN	283788
Time
Date	199409
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : phl
State Reference	PA
Altitude	msl bound lower : 3000 msl bound upper : 5000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : phl
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : atp
Experience	flight time last 90 days : 50 flight time total : 7500
ASRS Report	283788
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : nmac non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	vertical : 200
Supplementary
Primary Problem	Aircraft

Narrative:

While on approach into phl we had a TCASII alert at approximately 3000 ft. Alert stated climb, climb, climb. At approximately 5000 ft it stayed clear of conflict. Situation always seemed the other aircraft was 200 ft above us on the TCASII screen. After the conflict, we asked ATC if there was any problem. He made no remark, told us to descend to 3000 ft, turn left to (235 degrees)? And clear the approach. I believe the controller confused the 2 aircraft involved and possibly due to the similar flight numbers, one crew could have taken the turn for the other crew.

Original NASA ASRS Text

Title: MLG HAS TCASII RA TO CLB.

Narrative: WHILE ON APCH INTO PHL WE HAD A TCASII ALERT AT APPROX 3000 FT. ALERT STATED CLB, CLB, CLB. AT APPROX 5000 FT IT STAYED CLR OF CONFLICT. SIT ALWAYS SEEMED THE OTHER ACFT WAS 200 FT ABOVE US ON THE TCASII SCREEN. AFTER THE CONFLICT, WE ASKED ATC IF THERE WAS ANY PROB. HE MADE NO REMARK, TOLD US TO DSND TO 3000 FT, TURN L TO (235 DEGS)? AND CLR THE APCH. I BELIEVE THE CTLR CONFUSED THE 2 ACFT INVOLVED AND POSSIBLY DUE TO THE SIMILAR FLT NUMBERS, ONE CREW COULD HAVE TAKEN THE TURN FOR THE OTHER CREW.

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.