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Potential conflict avoided during altitude deviation altitude excursion by air carrier medium large transport. A TCASII RA alert.
| Attributes | |
| ACN | 250810 |
| Time | |
| Date | 199308 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : isp |
| State Reference | NY |
| Altitude | msl bound lower : 2700 msl bound upper : 3000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : n90 |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | cruise other cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft, High Wing, 1 Eng, Fixed Gear |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | None |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : flight engineer pilot : atp pilot : cfi pilot : commercial |
| Experience | flight time last 90 days : 150 flight time total : 5500 flight time type : 500 |
| ASRS Report | 250810 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance non adherence : far other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 9000 vertical : 800 |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On vectors for approach into isp. Very busy wkend afternoon for flying. ATC very busy. We received an RA to descend. I was first officer flying. Captain nor I could identify target, so on captain's command, I commenced descent and complied with RA. We were level at 3000 ft initially. I believe maximum deviation was 300 ft. At 2700 ft we received 'clear of conflict' and I returned to 3000 ft. Captain advised controller we had vacated altitude for RA and were climbing to assigned altitude. As I recall, controller was so busy he didn't acknowledge. I don't think he actually ever realized we had an RA, deviated and advised him! This was the second RA I had in 1 week from 2 different low altitude approach control facilities (other was bwi). Either our TCASII's are too sensitive or ATC is overloaded and not providing proper separation.
Original NASA ASRS Text
Title: POTENTIAL CONFLICT AVOIDED DURING ALTDEV ALT EXCURSION BY ACR MLG. A TCASII RA ALERT.
Narrative: ON VECTORS FOR APCH INTO ISP. VERY BUSY WKEND AFTERNOON FOR FLYING. ATC VERY BUSY. WE RECEIVED AN RA TO DSND. I WAS FO FLYING. CAPT NOR I COULD IDENT TARGET, SO ON CAPT'S COMMAND, I COMMENCED DSCNT AND COMPLIED WITH RA. WE WERE LEVEL AT 3000 FT INITIALLY. I BELIEVE MAX DEV WAS 300 FT. AT 2700 FT WE RECEIVED 'CLR OF CONFLICT' AND I RETURNED TO 3000 FT. CAPT ADVISED CTLR WE HAD VACATED ALT FOR RA AND WERE CLBING TO ASSIGNED ALT. AS I RECALL, CTLR WAS SO BUSY HE DIDN'T ACKNOWLEDGE. I DON'T THINK HE ACTUALLY EVER REALIZED WE HAD AN RA, DEVIATED AND ADVISED HIM! THIS WAS THE SECOND RA I HAD IN 1 WK FROM 2 DIFFERENT LOW ALT APCH CTL FACILITIES (OTHER WAS BWI). EITHER OUR TCASII'S ARE TOO SENSITIVE OR ATC IS OVERLOADED AND NOT PROVIDING PROPER SEPARATION.
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.