Potential conflict less than standard separation.

Attributes
ACN	212667
Time
Date	199206
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : roa
State Reference	VA
Altitude	msl bound lower : 10000 msl bound upper : 11000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : roa
Operator	common carrier : air carrier
Make Model Name	Medium Transport, High Wing, 2 Turboprop Eng
Flight Phase	descent other
Route In Use	enroute : direct
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Transport, High Wing, 2 Turboprop Eng
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors
Flight Plan	IFR
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 : 14000 flight time type : 5000
ASRS Report	212667
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation non adherence other other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera
Resolutory Action	controller : issued new clearance flight crew : took evasive action flight crew : exited adverse environment
Consequence	Other
Miss Distance	horizontal : 7500 vertical : 800
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error other
Situations
ATC Facility	procedure or policy : unspecified

Narrative:

Cleared by washington center to descend to 11000, contact roanoke approach frequency. Rogered and checked in with roa RAPCON 'roanoke, air carrier X descending to 11000, information...' response, 'roger, air carrier X, descend to 10000, company traffic 12 O'clock, climbing to 10000, XXX mi, altimeter XXXX.' my response, 'air carrier X, roger out of 11 for 10000, looking for the company.' shortly thereafter (30-45 seconds) TCASII RA 'traffic, traffic, climb, climb.' (altitude about 10500). Company was acquired at 1 O'clock 1-2 mi. Climb was initiated at the same time controller directed air carrier X (me) to climb immediately to 11000. Both myself and first officer commented to each other upon receiving clearance to the same altitude as company, but surmised that his initial altitude was such that a descent by us to the cleared altitude would not conflict with his climb to the same altitude. I believe that the controller intended to keep us at 11 but mis- spoke herself and said 10000. This incident sound familiar?

Original NASA ASRS Text

Title: POTENTIAL CONFLICT LTSS.

Narrative: CLRED BY WASHINGTON CTR TO DSND TO 11000, CONTACT ROANOKE APCH FREQ. ROGERED AND CHKED IN WITH ROA RAPCON 'ROANOKE, ACR X DSNDING TO 11000, INFO...' RESPONSE, 'ROGER, ACR X, DSND TO 10000, COMPANY TFC 12 O'CLOCK, CLBING TO 10000, XXX MI, ALTIMETER XXXX.' MY RESPONSE, 'ACR X, ROGER OUT OF 11 FOR 10000, LOOKING FOR THE COMPANY.' SHORTLY THEREAFTER (30-45 SECONDS) TCASII RA 'TFC, TFC, CLB, CLB.' (ALT ABOUT 10500). COMPANY WAS ACQUIRED AT 1 O'CLOCK 1-2 MI. CLB WAS INITIATED AT THE SAME TIME CTLR DIRECTED ACR X (ME) TO CLB IMMEDIATELY TO 11000. BOTH MYSELF AND FO COMMENTED TO EACH OTHER UPON RECEIVING CLRNC TO THE SAME ALT AS COMPANY, BUT SURMISED THAT HIS INITIAL ALT WAS SUCH THAT A DSCNT BY US TO THE CLRED ALT WOULD NOT CONFLICT WITH HIS CLB TO THE SAME ALT. I BELIEVE THAT THE CTLR INTENDED TO KEEP US AT 11 BUT MIS- SPOKE HERSELF AND SAID 10000. THIS INCIDENT SOUND FAMILIAR?

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.