Multiple runway operation parallel runways air carrier X TCASII RA had less than standard separation from commuter. Evasive action taken. System error.

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Attributes
ACN	305287
Time
Date	199505
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : pdx
State Reference	OR
Altitude	agl bound lower : 600 agl bound upper : 600
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : pdx tower : ewr
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial
Route In Use	departure other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	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 : 150 flight time total : 3800 flight time type : 1400
ASRS Report	305287
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : undershoot conflict : airborne less severe non adherence : required legal separation non adherence : published procedure non adherence : clearance
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 1100 vertical : 100
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Air carrier X cleared for takeoff on runway 28R at pdx. Cleared to fly the river departure. Departure procedures and noise abatement procedures direct on an immediate left turn to intercept the pdx VOR 277 degree radial. The VOR is near runway 28L at pdx. After turning to intercept the radial and at 600 ft AGL we got a TCASII RA to stop climb. I immediately leveled off. At that time all 3 crew members saw a commuter turboprop in our 9 O'clock position slightly above us and about 1000 ft horizontal. One of the most important things I learned from this incident is that TCASII works. It is invaluable in aiding clearing and avoiding other aircraft. I feel that the river departure at pdx should be changed. The runway 28R procedure has you practically intercepting the extended centerline of runway 28L. This is dangerous. Obviously the pdx tower procedure should not allow simultaneous departures from runways 28L&right and should stagger departures so that another incident such as this does not occur.

Original NASA ASRS Text

Title: MULTIPLE RWY OP PARALLEL RWYS ACR X TCASII RA HAD LTSS FROM COMMUTER. EVASIVE ACTION TAKEN. SYS ERROR.

Narrative: ACR X CLRED FOR TKOF ON RWY 28R AT PDX. CLRED TO FLY THE RIVER DEP. DEP PROCS AND NOISE ABATEMENT PROCS DIRECT ON AN IMMEDIATE L TURN TO INTERCEPT THE PDX VOR 277 DEG RADIAL. THE VOR IS NEAR RWY 28L AT PDX. AFTER TURNING TO INTERCEPT THE RADIAL AND AT 600 FT AGL WE GOT A TCASII RA TO STOP CLB. I IMMEDIATELY LEVELED OFF. AT THAT TIME ALL 3 CREW MEMBERS SAW A COMMUTER TURBOPROP IN OUR 9 O'CLOCK POS SLIGHTLY ABOVE US AND ABOUT 1000 FT HORIZ. ONE OF THE MOST IMPORTANT THINGS I LEARNED FROM THIS INCIDENT IS THAT TCASII WORKS. IT IS INVALUABLE IN AIDING CLRING AND AVOIDING OTHER ACFT. I FEEL THAT THE RIVER DEP AT PDX SHOULD BE CHANGED. THE RWY 28R PROC HAS YOU PRACTICALLY INTERCEPTING THE EXTENDED CTRLINE OF RWY 28L. THIS IS DANGEROUS. OBVIOUSLY THE PDX TWR PROC SHOULD NOT ALLOW SIMULTANEOUS DEPS FROM RWYS 28L&R AND SHOULD STAGGER DEPS SO THAT ANOTHER INCIDENT SUCH AS THIS DOES NOT OCCUR.

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.