An F100 received a TCASII RA from a climbing B737 and followed the avoidance command.

Attributes
ACN	432300
Time
Date	199903
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : buf.vortac
State Reference	NY
Altitude	msl bound lower : 29000 msl bound upper : 30000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob.artcc
Operator	common carrier : air carrier
Make Model Name	Fokker 100
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	cruise : level
Route In Use	enroute other
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zob.artcc
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise : enroute altitude change
Route In Use	enroute other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 200 flight time total : 15700 flight time type : 360
ASRS Report	432300
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : multi engine pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 150 flight time total : 9000 flight time type : 3300
ASRS Report	432531
Events
Anomaly	conflict : airborne critical other anomaly other
Independent Detector	aircraft equipment : tcas other flight crewa other flight crewb
Resolutory Action	flight crew : took evasive action
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

While in cruise at FL290, we received a TCASII alert. We observed a target climbing below us opposite direction. We then received a TCASII RA and a climb command. We climbed to FL300 and advised the center simultaneously. The target leveled at FL280 and we had visual contact. We descended back to FL290 and advised center. It must have been the high climb rate of the opposite direction B737 that set off our TCASII.

Original NASA ASRS Text

Title: AN F100 RECEIVED A TCASII RA FROM A CLBING B737 AND FOLLOWED THE AVOIDANCE COMMAND.

Narrative: WHILE IN CRUISE AT FL290, WE RECEIVED A TCASII ALERT. WE OBSERVED A TARGET CLBING BELOW US OPPOSITE DIRECTION. WE THEN RECEIVED A TCASII RA AND A CLB COMMAND. WE CLBED TO FL300 AND ADVISED THE CTR SIMULTANEOUSLY. THE TARGET LEVELED AT FL280 AND WE HAD VISUAL CONTACT. WE DSNDED BACK TO FL290 AND ADVISED CTR. IT MUST HAVE BEEN THE HIGH CLB RATE OF THE OPPOSITE DIRECTION B737 THAT SET OFF OUR TCASII.

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.