 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Air carrier large transport altitude deviation excursion from clearance altitude in response to TCASII RA.
| Attributes | |
| ACN | 185903 |
| Time | |
| Date | 199108 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : psk |
| State Reference | VA |
| Altitude | msl bound lower : 28000 msl bound upper : 29000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | enroute airway : zdc |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 16000 flight time type : 600 |
| ASRS Report | 185903 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : flight engineer pilot : commercial |
| Experience | flight time last 90 days : 180 flight time total : 3100 flight time type : 1700 |
| ASRS Report | 186328 |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude conflict : airborne less severe |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Miss Distance | horizontal : 0 vertical : 1000 |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
In cruise, FL280, TA alert 900 ft below climbing and closing. Attempted contact with center. Before communication established, RA alert 500 ft below, climbing and closing. Emergency climb 1800 FPM climb on TCAS. Since we had not been able to establish separation with center or acquire target visually, we followed TCAS. By FL290 we had center confirm target at FL270. TCAS still 500 ft climbing and closing clear of target, we returned FL280.
Original NASA ASRS Text
Title: ACR LGT ALT DEV EXCURSION FROM CLRNC ALT IN RESPONSE TO TCASII RA.
Narrative: IN CRUISE, FL280, TA ALERT 900 FT BELOW CLBING AND CLOSING. ATTEMPTED CONTACT WITH CENTER. BEFORE COM ESTABLISHED, RA ALERT 500 FT BELOW, CLBING AND CLOSING. EMER CLB 1800 FPM CLB ON TCAS. SINCE WE HAD NOT BEEN ABLE TO ESTABLISH SEPARATION WITH CENTER OR ACQUIRE TARGET VISUALLY, WE FOLLOWED TCAS. BY FL290 WE HAD CENTER CONFIRM TARGET AT FL270. TCAS STILL 500 FT CLBING AND CLOSING CLR OF TARGET, WE RETURNED FL280.
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.