 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Altitude deviatoin occurs after flight crew on air carrier large transport receives a TCASII alert then resolution.
| Attributes | |
| ACN | 181953 |
| Time | |
| Date | 199106 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : lga |
| State Reference | NY |
| Altitude | msl bound lower : 11000 msl bound upper : 11600 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : syr |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | arrival other arrival star : star enroute airway : zny |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise other |
| Flight Plan | VFR |
| 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 : 60 flight time total : 15000 flight time type : 8000 |
| ASRS Report | 181953 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : private pilot : instrument pilot : commercial pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 140 flight time total : 5000 flight time type : 1300 |
| ASRS Report | 182297 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe inflight encounter other non adherence : clearance |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action flight crew : returned to intended course or assigned course none taken : anomaly accepted |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 3000 vertical : 1100 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
At 11000' got a TA then an RA on TCAS that commanded a 2500' rate of climb for traffic at 10500' flying VFR. Just before the RA command, ATC advised of traffic at 10500'. The first officer was flying and reacted to the RA by climbing. I advised him to stop at 11600' figuring that it would not be necessary to climb higher and we might cause a real problem by going higher. We did not have the traffic visually until after we climbed. ATC was advised of our altitude deviation, they did not seem to be that concerned. The traffic passed off on our right side. Even though ATC had advised us of this traffic, we were not sure that that was indeed the traffic. That set off the RA. The traffic was level at 10500' and not climbing. We were on the nanci arrival to lga. Supplemental information from acn 182297: center then called out VFR traffic at 1-2 O'clock, 1/2 mi at 10500'. We believed that we had him in sight. 5-10 seconds later we received an RA from the TCAS that commanded a 2500 FPM climb. I punched off the autoplt and initiated a climb.
Original NASA ASRS Text
Title: ALT DEVIATOIN OCCURS AFTER FLT CREW ON ACR LGT RECEIVES A TCASII ALERT THEN RESOLUTION.
Narrative: AT 11000' GOT A TA THEN AN RA ON TCAS THAT COMMANDED A 2500' RATE OF CLB FOR TFC AT 10500' FLYING VFR. JUST BEFORE THE RA COMMAND, ATC ADVISED OF TFC AT 10500'. THE F/O WAS FLYING AND REACTED TO THE RA BY CLBING. I ADVISED HIM TO STOP AT 11600' FIGURING THAT IT WOULD NOT BE NECESSARY TO CLB HIGHER AND WE MIGHT CAUSE A REAL PROB BY GOING HIGHER. WE DID NOT HAVE THE TFC VISUALLY UNTIL AFTER WE CLBED. ATC WAS ADVISED OF OUR ALT DEVIATION, THEY DID NOT SEEM TO BE THAT CONCERNED. THE TFC PASSED OFF ON OUR RIGHT SIDE. EVEN THOUGH ATC HAD ADVISED US OF THIS TFC, WE WERE NOT SURE THAT THAT WAS INDEED THE TFC. THAT SET OFF THE RA. THE TFC WAS LEVEL AT 10500' AND NOT CLBING. WE WERE ON THE NANCI ARR TO LGA. SUPPLEMENTAL INFO FROM ACN 182297: CENTER THEN CALLED OUT VFR TFC AT 1-2 O'CLOCK, 1/2 MI AT 10500'. WE BELIEVED THAT WE HAD HIM IN SIGHT. 5-10 SECS LATER WE RECEIVED AN RA FROM THE TCAS THAT COMMANDED A 2500 FPM CLB. I PUNCHED OFF THE AUTOPLT AND INITIATED A CLB.
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.