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Descending into pit, air carrier given 4000' MSL. Another air carrier given 4000' to maintain visual on first aircraft. Second aircraft passed under first aircraft, missing by 200'.
| Attributes | |
| ACN | 165586 |
| Time | |
| Date | 199012 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : pit |
| State Reference | PA |
| Altitude | msl bound lower : 4000 msl bound upper : 4200 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : pit tower : mkc |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport, High Wing, 2 Turboprop Eng |
| Flight Phase | cruise other descent other |
| Route In Use | arrival other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Small Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | cruise other descent other |
| Route In Use | approach : visual |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 240 flight time total : 15600 flight time type : 5000 |
| ASRS Report | 165586 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 240 flight time total : 6700 flight time type : 2800 |
| ASRS Report | 165580 |
| Events | |
| Anomaly | conflict : nmac |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 0 vertical : 200 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On descent for landing at pit, we were given 4000'. Another aircraft behind us was asked to report us in sight, which they did. The other aircraft was then given a descent, also to 4000', to maintain visibility sep with us. The other aircraft apparently did not understand the clearance, as he passed 200' directly below us while approaching us from the right rear. If we had not stopped our descent at 4200', we may have had a midair collision. Even though the WX was good VFR, the fact that it was night may have effected the other pilot's visibility perceptions.
Original NASA ASRS Text
Title: DESCENDING INTO PIT, ACR GIVEN 4000' MSL. ANOTHER ACR GIVEN 4000' TO MAINTAIN VISUAL ON FIRST ACFT. SECOND ACFT PASSED UNDER FIRST ACFT, MISSING BY 200'.
Narrative: ON DSNT FOR LNDG AT PIT, WE WERE GIVEN 4000'. ANOTHER ACFT BEHIND US WAS ASKED TO RPT US IN SIGHT, WHICH THEY DID. THE OTHER ACFT WAS THEN GIVEN A DSNT, ALSO TO 4000', TO MAINTAIN VIS SEP WITH US. THE OTHER ACFT APPARENTLY DID NOT UNDERSTAND THE CLRNC, AS HE PASSED 200' DIRECTLY BELOW US WHILE APCHING US FROM THE RIGHT REAR. IF WE HAD NOT STOPPED OUR DSNT AT 4200', WE MAY HAVE HAD A MIDAIR COLLISION. EVEN THOUGH THE WX WAS GOOD VFR, THE FACT THAT IT WAS NIGHT MAY HAVE EFFECTED THE OTHER PLT'S VIS PERCEPTIONS.
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.