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Reporter concerned about captain in VMC does not respond to RA commands when the captain has the target displayed in sight visually.
| Attributes | |
| ACN | 289499 |
| Time | |
| Date | 199411 |
| Day | Mon |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | atc facility : lao |
| State Reference | FO |
| Altitude | msl bound lower : 31000 msl bound upper : 33000 |
| Aircraft 1 | |
| Controlling Facilities | tower : stl |
| Operator | common carrier : air carrier |
| Make Model Name | DC-10 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute airway : rpmm |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | B747 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : instrument pilot : flight engineer pilot : commercial |
| Experience | flight time last 90 days : 300 flight time total : 3500 |
| ASRS Report | 289499 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : took evasive action flight crew : returned to intended course or assigned course |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 3000 vertical : 500 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
In a climb to FL330, at about 31000 ft, we received a TCASII TA. We saw 747 at 11 O'clock, 2 mi in a climb. Then TCASII gave us an RA (descend, descend). The captain was flying. (Immediately the captain and first officer looked at radar scope and picked up aircraft at about 4 mi on radar scope.) the captain continued the climb. I said 'descend.' the first officer's hands approached the control column as he said 'descend' the captain said, 'I see him.' I said, 'descend, we don't know for sure that's the aircraft we're getting the warning from.' then the captain followed the RA. We tried to get the aircraft's call sign, as we heard him tell manilla control to file a near miss. Manilla control did not answer either of us and we had to switch frequencys. This is the second time I or another crew member had to talk a captain into following TCASII. When we are VFR, there is reluctance to follow TCASII RA's when the captain thinks he sees the cause of the alert. This is a dangerous practice and could result in a collision with an unknown.
Original NASA ASRS Text
Title: RPTR CONCERNED ABOUT CAPT IN VMC DOES NOT RESPOND TO RA COMMANDS WHEN THE CAPT HAS THE TARGET DISPLAYED IN SIGHT VISUALLY.
Narrative: IN A CLB TO FL330, AT ABOUT 31000 FT, WE RECEIVED A TCASII TA. WE SAW 747 AT 11 O'CLOCK, 2 MI IN A CLB. THEN TCASII GAVE US AN RA (DSND, DSND). THE CAPT WAS FLYING. (IMMEDIATELY THE CAPT AND FO LOOKED AT RADAR SCOPE AND PICKED UP ACFT AT ABOUT 4 MI ON RADAR SCOPE.) THE CAPT CONTINUED THE CLB. I SAID 'DSND.' THE FO'S HANDS APCHED THE CTL COLUMN AS HE SAID 'DSND' THE CAPT SAID, 'I SEE HIM.' I SAID, 'DSND, WE DON'T KNOW FOR SURE THAT'S THE ACFT WE'RE GETTING THE WARNING FROM.' THEN THE CAPT FOLLOWED THE RA. WE TRIED TO GET THE ACFT'S CALL SIGN, AS WE HEARD HIM TELL MANILLA CTL TO FILE A NEAR MISS. MANILLA CTL DID NOT ANSWER EITHER OF US AND WE HAD TO SWITCH FREQS. THIS IS THE SECOND TIME I OR ANOTHER CREW MEMBER HAD TO TALK A CAPT INTO FOLLOWING TCASII. WHEN WE ARE VFR, THERE IS RELUCTANCE TO FOLLOW TCASII RA'S WHEN THE CAPT THINKS HE SEES THE CAUSE OF THE ALERT. THIS IS A DANGEROUS PRACTICE AND COULD RESULT IN A COLLISION WITH AN UNKNOWN.
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.