Flight crew of air carrier large transport deviated from assigned approach altitude in response to a...

Attributes
ACN	225224
Time
Date	199210
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : san
State Reference	CA
Altitude	msl bound lower : 4000 msl bound upper : 4500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : san
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer pilot : instrument
Experience	flight time last 90 days : 310 flight time total : 16400 flight time type : 485
ASRS Report	225224
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	Other
Miss Distance	vertical : 500
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

As we joined the localizer at 4000 ft, we had 2 TA's on our TCASII in our turn. We received a climb command and climbed approximately 500 ft and the command terminated. We advised approach control of our climb and the reason. He said he had no aircraft out there. I saw 1 of the 2 that were displayed on the TCASII. This was the second RA on 2 successive legs in 1 day. Both were authenticated by visual contact.

Original NASA ASRS Text

Title: FLC OF ACR LGT DEVIATED FROM ASSIGNED APCH ALT IN RESPONSE TO A TCASII RA.

Narrative: AS WE JOINED THE LOC AT 4000 FT, WE HAD 2 TA'S ON OUR TCASII IN OUR TURN. WE RECEIVED A CLB COMMAND AND CLBED APPROX 500 FT AND THE COMMAND TERMINATED. WE ADVISED APCH CTL OF OUR CLB AND THE REASON. HE SAID HE HAD NO ACFT OUT THERE. I SAW 1 OF THE 2 THAT WERE DISPLAYED ON THE TCASII. THIS WAS THE SECOND RA ON 2 SUCCESSIVE LEGS IN 1 DAY. BOTH WERE AUTHENTICATED BY VISUAL CONTACT.

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.

Flight crew of air carrier large transport deviated from assigned approach altitude in response to a TCASII RA.