<< >> NASA ASRS Report 967349, August 2011

B737-300 captain climbing to FL280 reports a TCAS RA to monitor vertical speed; on traffic at FL290. The climb rate was decreased from 1;000 FPM to 500 FPM to comply with the RA.

Attributes
ACN	967349
Time
Date	201108
Local Time Of Day	1801-2400
Place
Locale Reference	ZDC.ARTCC
State Reference	VA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Component
Aircraft Component	Traffic Collision Avoidance System (TCAS)
Person 1
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 246 Flight Crew Type 20000
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

Climbing from our assigned altitude of FL270 to FL280; we got a TCAS RA to monitor vertical speed. We disconnected the autopilot and complied with the RA. A 500 FPM rate of climb was in the green arc on the vsi. The traffic was 1;000 ft above our assigned altitude on the display. Before the event; we were climbing at 1;000 FPM. There was no traffic conflict. I don't know why we got the RA. We got the clear of conflict message and continued to destination.

Related reports:

• A BE40's climb rate and speed above FL360 climbing to FL380 ...

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Original NASA ASRS Text

Title: B737-300 Captain climbing to FL280 reports a TCAS RA to monitor vertical speed; on traffic at FL290. The climb rate was decreased from 1;000 FPM to 500 FPM to comply with the RA.

Narrative: Climbing from our assigned altitude of FL270 to FL280; we got a TCAS RA to monitor vertical speed. We disconnected the autopilot and complied with the RA. A 500 FPM rate of climb was in the green arc on the VSI. The traffic was 1;000 FT above our assigned altitude on the display. Before the event; we were climbing at 1;000 FPM. There was no traffic conflict. I don't know why we got the RA. We got the Clear of Conflict message and continued to destination.

Data retrieved from NASA's ASRS site as of April 2012 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.