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Flight crew of a widebody transport observed another aircraft pass across their aircraft nose at their same altitude during high altitude cruise.
| Attributes | |
| ACN | 280136 |
| Time | |
| Date | 199408 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : bfs |
| State Reference | FO |
| Altitude | msl bound lower : 31000 msl bound upper : 31000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B767 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Route In Use | enroute airway : egpx |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 8700 |
| ASRS Report | 280136 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | other |
| Consequence | Other |
| Miss Distance | horizontal : 21000 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Air carrier X FL310 at .80 mach proceeding to 58n10w encountered air carrier Y FL310 proceeding to 56n10w with closest point of approach being within 2.5 mi arc on TCASII. No RA was activated. First officer noticed aircraft pass from right cockpit side across nose in approximately 6 seconds. Air carrier X hit proceeding aircraft's wake with no significant effect. No navigation errors were noted by air carrier X. Suspect ATC error. Satellite data link position updates could alleviate problem. Final note: if air carrier X had been approximately 10 seconds earlier, we all would have had a crummy afternoon.
Original NASA ASRS Text
Title: FLC OF A WDB OBSERVED ANOTHER ACFT PASS ACROSS THEIR ACFT NOSE AT THEIR SAME ALT DURING HIGH ALT CRUISE.
Narrative: ACR X FL310 AT .80 MACH PROCEEDING TO 58N10W ENCOUNTERED ACR Y FL310 PROCEEDING TO 56N10W WITH CLOSEST POINT OF APCH BEING WITHIN 2.5 MI ARC ON TCASII. NO RA WAS ACTIVATED. FO NOTICED ACFT PASS FROM R COCKPIT SIDE ACROSS NOSE IN APPROX 6 SECONDS. ACR X HIT PROCEEDING ACFT'S WAKE WITH NO SIGNIFICANT EFFECT. NO NAV ERRORS WERE NOTED BY ACR X. SUSPECT ATC ERROR. SATELLITE DATA LINK POS UPDATES COULD ALLEVIATE PROB. FINAL NOTE: IF ACR X HAD BEEN APPROX 10 SECONDS EARLIER, WE ALL WOULD HAVE HAD A CRUMMY AFTERNOON.
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.