Flight crew of A320 on RNAV misses trm by 4 mi.

Attributes
ACN	425620
Time
Date	199901
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : trm
State Reference	CA
Altitude	msl bound lower : 29000 msl bound upper : 29000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Navigation In Use	Other
Flight Phase	cruise other
Route In Use	enroute other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial
Experience	flight time last 90 days : 200 flight time total : 10000 flight time type : 600
ASRS Report	425620
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial
Events
Anomaly	non adherence : far non adherence : clearance other spatial deviation
Independent Detector	atc equipment other atc equipment : unspecified
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Air Traffic Incident	Pilot Deviation

Narrative:

With the autoplt on and the lateral mode in navigation, the aircraft was proceeding direct to trm after departing sna. The navigation display displayed and the aircraft flew a turn at trm to tnp. The aircraft lead the turn at trm to roll out on the course direct tnp. This lead caused the aircraft to miss trm VOR by 4 mi. ZLA noted the turn and the distance to trm VOR and stated that, 'we need to watch that in the future.' we have been trained and the aircraft has been programmed to fly these type of turns. Discrepancies between our training, aircraft programming, FARS, and center procedures need to be idented and corrected.

Original NASA ASRS Text

Title: FLC OF A320 ON RNAV MISSES TRM BY 4 MI.

Narrative: WITH THE AUTOPLT ON AND THE LATERAL MODE IN NAV, THE ACFT WAS PROCEEDING DIRECT TO TRM AFTER DEPARTING SNA. THE NAV DISPLAY DISPLAYED AND THE ACFT FLEW A TURN AT TRM TO TNP. THE ACFT LEAD THE TURN AT TRM TO ROLL OUT ON THE COURSE DIRECT TNP. THIS LEAD CAUSED THE ACFT TO MISS TRM VOR BY 4 MI. ZLA NOTED THE TURN AND THE DISTANCE TO TRM VOR AND STATED THAT, 'WE NEED TO WATCH THAT IN THE FUTURE.' WE HAVE BEEN TRAINED AND THE ACFT HAS BEEN PROGRAMMED TO FLY THESE TYPE OF TURNS. DISCREPANCIES BTWN OUR TRAINING, ACFT PROGRAMMING, FARS, AND CTR PROCS NEED TO BE IDENTED AND CORRECTED.

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.