B757 captain receives a TCASII RA while on approach for runway 10R at pdx.

Attributes
ACN	401957
Time
Date	199805
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : pdx
State Reference	OR
Altitude	msl bound lower : 700 msl bound upper : 1100
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tower : pdx
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	401957
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	conflict : airborne less severe other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action other other
Consequence	Other
Miss Distance	vertical : 400
Supplementary
Air Traffic Incident	other

Narrative:

Arriving pdx landing on runway 10R at approximately 1100 ft, we received a TCASII TA followed by a TCASII RA for traffic 400 ft below us and climbing. There is a small airport (pearson airpark) located just north of the localizer course that we were aware of, but we could not find the traffic. Pdx tower did not warn us of the traffic probably due to the pop up nature of the traffic and the controller was busy giving instructions to other aircraft. The missed approach we performed was uneventful, but we would like to avoid it in the future. It might be a good idea to notify crews as to the location of the airpark on the pages or through a message on the flight plan. After talking to the controller on the phone, he said it is quite common to receive TCASII alerts with this situation. Also a note on the ATIS when pdx is landing to the east would be very helpful. Nashville is one airport where they continually warned us of the airport to the north of their field and it was a big help. Anything to help increase awareness would be a big help.

Original NASA ASRS Text

Title: B757 CAPT RECEIVES A TCASII RA WHILE ON APCH FOR RWY 10R AT PDX.

Narrative: ARRIVING PDX LNDG ON RWY 10R AT APPROX 1100 FT, WE RECEIVED A TCASII TA FOLLOWED BY A TCASII RA FOR TFC 400 FT BELOW US AND CLBING. THERE IS A SMALL ARPT (PEARSON AIRPARK) LOCATED JUST N OF THE LOC COURSE THAT WE WERE AWARE OF, BUT WE COULD NOT FIND THE TFC. PDX TWR DID NOT WARN US OF THE TFC PROBABLY DUE TO THE POP UP NATURE OF THE TFC AND THE CTLR WAS BUSY GIVING INSTRUCTIONS TO OTHER ACFT. THE MISSED APCH WE PERFORMED WAS UNEVENTFUL, BUT WE WOULD LIKE TO AVOID IT IN THE FUTURE. IT MIGHT BE A GOOD IDEA TO NOTIFY CREWS AS TO THE LOCATION OF THE AIRPARK ON THE PAGES OR THROUGH A MESSAGE ON THE FLT PLAN. AFTER TALKING TO THE CTLR ON THE PHONE, HE SAID IT IS QUITE COMMON TO RECEIVE TCASII ALERTS WITH THIS SIT. ALSO A NOTE ON THE ATIS WHEN PDX IS LNDG TO THE E WOULD BE VERY HELPFUL. NASHVILLE IS ONE ARPT WHERE THEY CONTINUALLY WARNED US OF THE ARPT TO THE N OF THEIR FIELD AND IT WAS A BIG HELP. ANYTHING TO HELP INCREASE AWARENESS WOULD BE A BIG HELP.

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.