Near midair collision.

Attributes
ACN	111556
Time
Date	198905
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : mdt
State Reference	PA
Altitude	msl bound lower : 10200 msl bound upper : 10200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : znuy
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	descent other
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 : 20000 flight time type : 6000
ASRS Report	111556
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : flight engineer
Experience	flight time last 90 days : 150 flight time total : 15000 flight time type : 227
ASRS Report	111568
Events
Anomaly	conflict : nmac
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	unspecified : 300
Supplementary
Primary Problem	Ambiguous

Narrative:

I took off from mdt, assigned runway heading maintain 3000'. After change over to ZNY I was cleared to maintain FL270. At 10200' ZNY cleared me to maintain 10000'. I applied forward pressure on yoke to return to 10000'. At that moment the first officer stated 'there he is,' and applied right aileron. A twin engine aircraft in a descending left turn from our right to left passed directly in front of us. We passed each other within an estimated 300'. The normal clearance out of mdt wbound via V33 to intercept J64. At the time of this event harrisburg VOR was shut down. Therefore, in my opinion, the controller was not able to utilize his normal departure route and was keeping us on runway heading. This abnormal situation probably contributed to the misguidance of both aircraft by a controller with a very heavy workload.

Original NASA ASRS Text

Title: NMAC.

Narrative: I TOOK OFF FROM MDT, ASSIGNED RWY HDG MAINTAIN 3000'. AFTER CHANGE OVER TO ZNY I WAS CLRED TO MAINTAIN FL270. AT 10200' ZNY CLRED ME TO MAINTAIN 10000'. I APPLIED FORWARD PRESSURE ON YOKE TO RETURN TO 10000'. AT THAT MOMENT THE F/O STATED 'THERE HE IS,' AND APPLIED RIGHT AILERON. A TWIN ENG ACFT IN A DSNDING LEFT TURN FROM OUR RIGHT TO LEFT PASSED DIRECTLY IN FRONT OF US. WE PASSED EACH OTHER WITHIN AN ESTIMATED 300'. THE NORMAL CLRNC OUT OF MDT WBOUND VIA V33 TO INTERCEPT J64. AT THE TIME OF THIS EVENT HARRISBURG VOR WAS SHUT DOWN. THEREFORE, IN MY OPINION, THE CTLR WAS NOT ABLE TO UTILIZE HIS NORMAL DEP ROUTE AND WAS KEEPING US ON RWY HDG. THIS ABNORMAL SITUATION PROBABLY CONTRIBUTED TO THE MISGUIDANCE OF BOTH ACFT BY A CTLR WITH A VERY HEAVY WORKLOAD.

Data retrieved from NASA's ASRS site as of August 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.