 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Near midair collision between 2 air carrier medium large transport aircraft making visual approachs side by side to parallel runways.
| Attributes | |
| ACN | 268512 |
| Time | |
| Date | 199404 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : stl |
| State Reference | MO |
| Altitude | msl bound lower : 3000 msl bound upper : 3000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : stl |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 18000 flight time type : 900 |
| ASRS Report | 268512 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | conflict : nmac non adherence : clearance non adherence : far other anomaly other other spatial deviation |
| 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 : 100 vertical : 500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
The sequence of events occurred on a visual approach to runway 30R at stl. We received a TA on our TCASII shortly before ATC advised us that an air carrier Y dc-9 was making a visual approach to 30L and that he had us in sight. Referring to the TCASII I was able to find him visually, but was surprised that he was nearly directly overhead (spotted through eyebrow window). He was in a left bank. At that point 2 things were obvious: 1) he had significantly overshot the centerline of 30L and, 2) there was no possible way he had us visually in sight. Later on several occasions we received 'RA's' indicating that he was within 500 ft and commanding a 1500 FPM descent. In view of my earlier sighting I believe these were legitimate warnings, consequently we did descend below the normal GS. Shortly before landing I was able to see the DC9 in about our abeam position. After landing I discussed the situation with the tower supervisor on the telephone. I was advised that it was not an uncommon event.
Original NASA ASRS Text
Title: NMAC BTWN 2 ACR MLG ACFT MAKING VISUAL APCHS SIDE BY SIDE TO PARALLEL RWYS.
Narrative: THE SEQUENCE OF EVENTS OCCURRED ON A VISUAL APCH TO RWY 30R AT STL. WE RECEIVED A TA ON OUR TCASII SHORTLY BEFORE ATC ADVISED US THAT AN ACR Y DC-9 WAS MAKING A VISUAL APCH TO 30L AND THAT HE HAD US IN SIGHT. REFERRING TO THE TCASII I WAS ABLE TO FIND HIM VISUALLY, BUT WAS SURPRISED THAT HE WAS NEARLY DIRECTLY OVERHEAD (SPOTTED THROUGH EYEBROW WINDOW). HE WAS IN A L BANK. AT THAT POINT 2 THINGS WERE OBVIOUS: 1) HE HAD SIGNIFICANTLY OVERSHOT THE CTRLINE OF 30L AND, 2) THERE WAS NO POSSIBLE WAY HE HAD US VISUALLY IN SIGHT. LATER ON SEVERAL OCCASIONS WE RECEIVED 'RA'S' INDICATING THAT HE WAS WITHIN 500 FT AND COMMANDING A 1500 FPM DESCENT. IN VIEW OF MY EARLIER SIGHTING I BELIEVE THESE WERE LEGITIMATE WARNINGS, CONSEQUENTLY WE DID DSND BELOW THE NORMAL GS. SHORTLY BEFORE LNDG I WAS ABLE TO SEE THE DC9 IN ABOUT OUR ABEAM POS. AFTER LNDG I DISCUSSED THE SIT WITH THE TWR SUPVR ON THE TELEPHONE. I WAS ADVISED THAT IT WAS NOT AN UNCOMMON EVENT.
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.