Altitude deviation altitude excursion in flight crew response to TCASII RA.

Attributes
ACN	280411
Time
Date	199408
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : rjtg
State Reference	FO
Altitude	msl bound lower : 29000 msl bound upper : 33000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B747-400
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other
Route In Use	enroute : pacific enroute : other oceanic enroute airway : g597
Flight Plan	IFR
Aircraft 2
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	other : unknown
Flight Phase	cruise other
Route In Use	enroute : other oceanic enroute : pacific
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : atp pilot : commercial pilot : flight engineer
ASRS Report	280411
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : published procedure non adherence : clearance non adherence : required legal separation other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera
Resolutory Action	controller : issued new clearance flight crew : took evasive action flight crew : exited adverse environment
Consequence	Other
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error
Situations
ATC Facility	procedure or policy : unspecified

Narrative:

In cruise flight, at FL330, on 6597. A TA was received -- traffic indicated at 10 O'clock converging, also at FL330 -- traffic acquired visually. RA commanded 'descend now.' sounded and TCASII guidance appeared on pfd. Complied. ATC cleared flight to FL290 with 90 degree course change to right. Traffic passed west and above. Unknown distance. Reclred on course and back to FL330. Reason for conflict unknown. Controller very busy.

Original NASA ASRS Text

Title: ALTDEV ALT EXCURSION IN FLC RESPONSE TO TCASII RA.

Narrative: IN CRUISE FLT, AT FL330, ON 6597. A TA WAS RECEIVED -- TFC INDICATED AT 10 O'CLOCK CONVERGING, ALSO AT FL330 -- TFC ACQUIRED VISUALLY. RA COMMANDED 'DSND NOW.' SOUNDED AND TCASII GUIDANCE APPEARED ON PFD. COMPLIED. ATC CLRED FLT TO FL290 WITH 90 DEG COURSE CHANGE TO R. TFC PASSED W AND ABOVE. UNKNOWN DISTANCE. RECLRED ON COURSE AND BACK TO FL330. REASON FOR CONFLICT UNKNOWN. CTLR VERY BUSY.

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.