Altitude deviation altitude excursion in a non adherence to an ATC clearance instruction due to TCAS...

Attributes
ACN	216646
Time
Date	199207
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : tul
State Reference	OK
Altitude	agl bound lower : 2500 agl bound upper : 2500
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : tul
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	descent : approach
Route In Use	approach : straight in enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise other cruise other
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : commercial pilot : flight engineer pilot : instrument
Experience	flight time last 90 days : 200 flight time total : 15000 flight time type : 2500
ASRS Report	216646
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : flight engineer pilot : commercial pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude altitude deviation : undershoot conflict : airborne less severe non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were cleared to descend to pick up GS to 36R, I don't remember the altitude, but somewhere below 3000 ft MSL as we were about to intercept GS 36R, the TCASII gave a TA, then an RA. I climbed as per the RA. When we were clear of conflict, I re-intercepted GS, I probably climbed about 500 ft. The copilot was flying the aircraft until the RA. It was his second trip in the airplane and a little slow to react, so I took control until the 'clear of conflict' call. ATC said they had control of all aircraft in our area and that no one was closer than 500 ft vertically. The TCASII indicated the intruder at 200 ft. I was unable to locate the traffic visually, even though I was in the clear at this point with the runway in sight. This RA may have been erroneous. TCASII is turning into a real nuisance. 2-MAN crews are busy enough in the terminal area without all the distrs that TCASII causes in the cockpit.

Original NASA ASRS Text

Title: ALTDEV ALT EXCURSION IN A NON ADHERENCE TO AN ATC CLRNC INSTRUCTION DUE TO TCASII RA.

Narrative: WE WERE CLRED TO DSND TO PICK UP GS TO 36R, I DON'T REMEMBER THE ALT, BUT SOMEWHERE BELOW 3000 FT MSL AS WE WERE ABOUT TO INTERCEPT GS 36R, THE TCASII GAVE A TA, THEN AN RA. I CLBED AS PER THE RA. WHEN WE WERE CLR OF CONFLICT, I RE-INTERCEPTED GS, I PROBABLY CLBED ABOUT 500 FT. THE COPLT WAS FLYING THE ACFT UNTIL THE RA. IT WAS HIS SECOND TRIP IN THE AIRPLANE AND A LITTLE SLOW TO REACT, SO I TOOK CTL UNTIL THE 'CLR OF CONFLICT' CALL. ATC SAID THEY HAD CTL OF ALL ACFT IN OUR AREA AND THAT NO ONE WAS CLOSER THAN 500 FT VERTICALLY. THE TCASII INDICATED THE INTRUDER AT 200 FT. I WAS UNABLE TO LOCATE THE TFC VISUALLY, EVEN THOUGH I WAS IN THE CLR AT THIS POINT WITH THE RWY IN SIGHT. THIS RA MAY HAVE BEEN ERRONEOUS. TCASII IS TURNING INTO A REAL NUISANCE. 2-MAN CREWS ARE BUSY ENOUGH IN THE TERMINAL AREA WITHOUT ALL THE DISTRS THAT TCASII CAUSES IN THE COCKPIT.

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.

Altitude deviation altitude excursion in a non adherence to an ATC clearance instruction due to TCASII RA.