 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A B727 first officer report on marginal horizontal clearance from a preceding BE1900 aircraft during a visual IFR descent clearance northwest of pie, fl.
| Attributes | |
| ACN | 457975 |
| Time | |
| Date | 199912 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : pie.vortac |
| State Reference | FL |
| Altitude | msl single value : 16000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | artcc : zma.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B727-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other vortac |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zma.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Beech 1900 |
| Operating Under FAR Part | Part 135 |
| Navigation In Use | other vortac |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : commercial pilot : multi engine |
| Experience | flight time last 90 days : 160 flight time total : 5000 flight time type : 200 |
| ASRS Report | 457975 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted |
| Miss Distance | horizontal : 1500 vertical : 0 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Environmental Factor ATC Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
On dec/xa/99, I was the first officer and the PF on flight X. We were at 17000 ft and we were cleared to 11000 ft, reference traffic at 12 O'clock. We had traffic in sight and began descent. The other aircraft was at 16000 ft and about 150 KTS slower. Once descent was started, we realized that we were a lot closer than we thought and commenced a turn to avoid aircraft. We passed about 1/4 mi from the other aircraft at same altitude. At no time was safety compromised -- it was just a lot closer than we would have liked. The time of day (dusk) and the closure rate were contributing factors into the illusion of our distance.
Original NASA ASRS Text
Title: A B727 FO RPT ON MARGINAL HORIZ CLRNC FROM A PRECEDING BE1900 ACFT DURING A VISUAL IFR DSCNT CLRNC NW OF PIE, FL.
Narrative: ON DEC/XA/99, I WAS THE FO AND THE PF ON FLT X. WE WERE AT 17000 FT AND WE WERE CLRED TO 11000 FT, REF TFC AT 12 O'CLOCK. WE HAD TFC IN SIGHT AND BEGAN DSCNT. THE OTHER ACFT WAS AT 16000 FT AND ABOUT 150 KTS SLOWER. ONCE DSCNT WAS STARTED, WE REALIZED THAT WE WERE A LOT CLOSER THAN WE THOUGHT AND COMMENCED A TURN TO AVOID ACFT. WE PASSED ABOUT 1/4 MI FROM THE OTHER ACFT AT SAME ALT. AT NO TIME WAS SAFETY COMPROMISED -- IT WAS JUST A LOT CLOSER THAN WE WOULD HAVE LIKED. THE TIME OF DAY (DUSK) AND THE CLOSURE RATE WERE CONTRIBUTING FACTORS INTO THE ILLUSION OF OUR DISTANCE.
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.