 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Captain of air carrier medium large transport aircraft deviated from assigned altitude when responding to a TCASII RA.
| Attributes | |
| ACN | 206774 |
| Time | |
| Date | 199204 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : sat |
| State Reference | TX |
| Altitude | msl bound lower : 3800 msl bound upper : 4000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sat |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Small Aircraft, High Wing, 1 Eng, Fixed Gear |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 18000 flight time type : 10000 |
| ASRS Report | 206774 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | controller : issued new clearance |
| Consequence | Other |
| Miss Distance | vertical : 500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On downwind, traffic was advised at approximately 1 O'clock. At about the same time as a visual on the traffic was acquired with simultaneous TCASII activation with a descend command (about 300 FPM indicated on the ivsi). I gently reduced altitude to 3800 ft and advised approach what we were doing. The TCASII then advised to monitor altitude (vertical rate). Approach gave us 3500 and the TCASII ceased RA's and returned to normal operation. The small aircraft type aircraft passing overhead (estimated 400 ft and behind my aircraft).
Original NASA ASRS Text
Title: CAPT OF ACR MLG ACFT DEVIATED FROM ASSIGNED ALT WHEN RESPONDING TO A TCASII RA.
Narrative: ON DOWNWIND, TFC WAS ADVISED AT APPROX 1 O'CLOCK. AT ABOUT THE SAME TIME AS A VISUAL ON THE TFC WAS ACQUIRED WITH SIMULTANEOUS TCASII ACTIVATION WITH A DSND COMMAND (ABOUT 300 FPM INDICATED ON THE IVSI). I GENTLY REDUCED ALT TO 3800 FT AND ADVISED APCH WHAT WE WERE DOING. THE TCASII THEN ADVISED TO MONITOR ALT (VERT RATE). APCH GAVE US 3500 AND THE TCASII CEASED RA'S AND RETURNED TO NORMAL OP. THE SMA TYPE ACFT PASSING OVERHEAD (ESTIMATED 400 FT AND BEHIND MY ACFT).
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.