An mdt air carrier had 2 TCASII RA's within 7 mins with no advisory from ATC.

Attributes
ACN	216997
Time
Date	199208
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : oxi
State Reference	IN
Altitude	msl bound lower : 8000 msl bound upper : 9000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : bos
Operator	common carrier : air carrier
Make Model Name	Medium Transport, Low Wing, 2 Turboprop Eng
Flight Phase	cruise other
Route In Use	enroute airway : zau
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise other
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 15000
ASRS Report	216997
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

Received 2 RA's on TCASII within 7 mins. First RA was when we were level at 9000 ft. Conflict was indicated to be 100 ft above our aircraft, never attained visual contact. Second conflict was with climbing traffic climbing through our altitude (8000 ft). Both RA's commanded 'descend.' visual confirmation of second RA was attained at 1/4 mi and less than 200 ft above us. Queried ARTCC as to either conflict was indicated on their radar. Answer was no to the first RA, yes to the second RA. Our flight crew was perturbed with the lack of advisories and we expressed that to the controller. Controller subsequently began calling all VFR traffic which was obviously not a conflict to us. In short, the subsequent overkill of TA's did not make up for failing to advise us of the more serious conflicts.

Original NASA ASRS Text

Title: AN MDT ACR HAD 2 TCASII RA'S WITHIN 7 MINS WITH NO ADVISORY FROM ATC.

Narrative: RECEIVED 2 RA'S ON TCASII WITHIN 7 MINS. FIRST RA WAS WHEN WE WERE LEVEL AT 9000 FT. CONFLICT WAS INDICATED TO BE 100 FT ABOVE OUR ACFT, NEVER ATTAINED VISUAL CONTACT. SECOND CONFLICT WAS WITH CLBING TFC CLBING THROUGH OUR ALT (8000 FT). BOTH RA'S COMMANDED 'DSND.' VISUAL CONFIRMATION OF SECOND RA WAS ATTAINED AT 1/4 MI AND LESS THAN 200 FT ABOVE US. QUERIED ARTCC AS TO EITHER CONFLICT WAS INDICATED ON THEIR RADAR. ANSWER WAS NO TO THE FIRST RA, YES TO THE SECOND RA. OUR FLC WAS PERTURBED WITH THE LACK OF ADVISORIES AND WE EXPRESSED THAT TO THE CTLR. CTLR SUBSEQUENTLY BEGAN CALLING ALL VFR TFC WHICH WAS OBVIOUSLY NOT A CONFLICT TO US. IN SHORT, THE SUBSEQUENT OVERKILL OF TA'S DID NOT MAKE UP FOR FAILING TO ADVISE US OF THE MORE SERIOUS CONFLICTS.

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.