Air carrier flight departing phl given climb to 10000 ft and frequency change to center. Delay on initial call to center due to frequency congestion leads to TCASII advisory and evasive climb before radio contact with center is established.

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Attributes
ACN	210371
Time
Date	199205
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : mxe airport : phl
State Reference	PA
Altitude	msl bound lower : 10000 msl bound upper : 10000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zny tracon : phl
Operator	common carrier : air carrier
Make Model Name	Large Transport
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	departure other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : flight engineer pilot : instrument pilot : atp
Experience	flight time last 90 days : 200 flight time total : 14000 flight time type : 3000
ASRS Report	210371
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : took evasive action other
Consequence	Other
Miss Distance	horizontal : 0 vertical : 500
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

After takeoff from phl climbing to 10000 ft assigned by phl departure, phl departure handed off to new york center but radio communication delayed due to frequency jamming. At 10000 ft straight and level, TCASII voiced 'traffic' 400 ft below with TA progressing to RA with TCASII instructions to 'climb, climb' which we did to 10400 ft MSL. Visually sighting traffic 12 O'clock low then descending back to 10000 ft.

Original NASA ASRS Text

Title: AIR CARRIER FLT DEPARTING PHL GIVEN CLB TO 10000 FT AND FREQ CHANGE TO CTR. DELAY ON INITIAL CALL TO CTR DUE TO FREQ CONGESTION LEADS TO TCASII ADVISORY AND EVASIVE CLB BEFORE RADIO CONTACT WITH CTR IS ESTABLISHED.

Narrative: AFTER TKOF FROM PHL CLBING TO 10000 FT ASSIGNED BY PHL DEP, PHL DEP HANDED OFF TO NEW YORK CTR BUT RADIO COM DELAYED DUE TO FREQ JAMMING. AT 10000 FT STRAIGHT AND LEVEL, TCASII VOICED 'TFC' 400 FT BELOW WITH TA PROGRESSING TO RA WITH TCASII INSTRUCTIONS TO 'CLB, CLB' WHICH WE DID TO 10400 FT MSL. VISUALLY SIGHTING TFC 12 O'CLOCK LOW THEN DSNDING BACK TO 10000 FT.

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.