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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Heading track deviation. Near midair collision.
| Attributes | |
| ACN | 276445 |
| Time | |
| Date | 199407 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : pit |
| State Reference | PA |
| Altitude | msl bound lower : 2500 msl bound upper : 6000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : pit |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 135 |
| Flight Phase | cruise other descent : approach |
| Route In Use | approach : visual enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | descent : approach |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 60 flight time total : 5300 flight time type : 3500 |
| ASRS Report | 276445 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : less severe conflict : nmac non adherence : clearance other anomaly other other spatial deviation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 400 vertical : 250 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Upon entering class B airspace, we were at 6000 ft MSL. We were told to expect runway 28R visual for landing. Approach waited until we were 8 mi from the airport before giving us a lower altitude (2500 ft MSL). We told them we were unpressurized and that we couldn't get down in time. We were then given a turn and told to expect runway 32, which we couldn't get down for either. ATC then told us to fly 120 degrees. ATC then decided to put someone else in front of us. ATC then told us to 'bend it around and expect runway 28R visual.' we kept turning and watching the traffic on TCASII. Paying attention to the TCASII and looking outside, we turned past 120 degrees by then TCASII gave us an RA which we obeyed. In the future, I think ATC should take into consideration that some aircraft are not pressurized. Also, that in poor visibility in haze we depend on ILS's to back up our visual approachs. When ATC changes runway assignments 3 times in a period of 5 mins it makes it very difficult to set up radios for approachs. Too many distrs! In this instance TCASII was crucial in maintaining separation. It has proved many times over invaluable.
Original NASA ASRS Text
Title: HDG TRACK DEV. NMAC.
Narrative: UPON ENTERING CLASS B AIRSPACE, WE WERE AT 6000 FT MSL. WE WERE TOLD TO EXPECT RWY 28R VISUAL FOR LNDG. APCH WAITED UNTIL WE WERE 8 MI FROM THE ARPT BEFORE GIVING US A LOWER ALT (2500 FT MSL). WE TOLD THEM WE WERE UNPRESSURIZED AND THAT WE COULDN'T GET DOWN IN TIME. WE WERE THEN GIVEN A TURN AND TOLD TO EXPECT RWY 32, WHICH WE COULDN'T GET DOWN FOR EITHER. ATC THEN TOLD US TO FLY 120 DEGS. ATC THEN DECIDED TO PUT SOMEONE ELSE IN FRONT OF US. ATC THEN TOLD US TO 'BEND IT AROUND AND EXPECT RWY 28R VISUAL.' WE KEPT TURNING AND WATCHING THE TFC ON TCASII. PAYING ATTN TO THE TCASII AND LOOKING OUTSIDE, WE TURNED PAST 120 DEGS BY THEN TCASII GAVE US AN RA WHICH WE OBEYED. IN THE FUTURE, I THINK ATC SHOULD TAKE INTO CONSIDERATION THAT SOME ACFT ARE NOT PRESSURIZED. ALSO, THAT IN POOR VISIBILITY IN HAZE WE DEPEND ON ILS'S TO BACK UP OUR VISUAL APCHS. WHEN ATC CHANGES RWY ASSIGNMENTS 3 TIMES IN A PERIOD OF 5 MINS IT MAKES IT VERY DIFFICULT TO SET UP RADIOS FOR APCHS. TOO MANY DISTRS! IN THIS INSTANCE TCASII WAS CRUCIAL IN MAINTAINING SEPARATION. IT HAS PROVED MANY TIMES OVER INVALUABLE.
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.