Air carrier mgl altitude deviation excursion from clearance altitude in response to TCASII RA.

Attributes
ACN	181156
Time
Date	199106
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sjc
State Reference	CA
Altitude	msl bound lower : 5400 msl bound upper : 6000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : oak
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport
Flight Phase	climbout : intermediate altitude
Route In Use	departure sid : sid
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Aircraft
Flight Phase	cruise other
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 11000
ASRS Report	181156
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Experience	flight time last 90 days : 100 flight time total : 3000
ASRS Report	181487
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance non adherence : far
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	controller : issued new clearance
Consequence	Other
Miss Distance	horizontal : 12000 vertical : 300
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

We were level at 5000', heading 120 degrees at 4 KM north of sjc on loupe 7 departure. ATC cleared us to climb and maintain 12000'. At 5500' we received a TA from our TCAS of an aircraft at 4-5 mi ahead. A short time later, approaching 6000', we received an RA, 'monitor vertical speed,' advising us to discontinue climb. At this time I advised ATC of our situation (traffic indicating 2 KM ahead, 300' above us). Seconds later, TCAS commanded, 'descend, descend,' 1500 FPM. ATC said they 'now see the traffic,' and gave us a right turn turn to 190 degrees. At 5400' we received 'clear of conflict' from our tcs. ATC then cleared us to climb and maintain FL230 with a restriction of crossing sjc VOR at or below 12000'. Resumed flight west/O further incident.

Original NASA ASRS Text

Title: ACR MGL ALT DEVIATION EXCURSION FROM CLRNC ALT IN RESPONSE TO TCASII RA.

Narrative: WE WERE LEVEL AT 5000', HDG 120 DEGS AT 4 KM N OF SJC ON LOUPE 7 DEP. ATC CLRED US TO CLB AND MAINTAIN 12000'. AT 5500' WE RECEIVED A TA FROM OUR TCAS OF AN ACFT AT 4-5 MI AHEAD. A SHORT TIME LATER, APCHING 6000', WE RECEIVED AN RA, 'MONITOR VERT SPD,' ADVISING US TO DISCONTINUE CLB. AT THIS TIME I ADVISED ATC OF OUR SITUATION (TFC INDICATING 2 KM AHEAD, 300' ABOVE US). SECS LATER, TCAS COMMANDED, 'DSND, DSND,' 1500 FPM. ATC SAID THEY 'NOW SEE THE TFC,' AND GAVE US A RIGHT TURN TURN TO 190 DEGS. AT 5400' WE RECEIVED 'CLR OF CONFLICT' FROM OUR TCS. ATC THEN CLRED US TO CLB AND MAINTAIN FL230 WITH A RESTRICTION OF XING SJC VOR AT OR BELOW 12000'. RESUMED FLT W/O FURTHER INCIDENT.

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.