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Flight crew of medium large transport complying with TCASII RA to descend pushed nose over but forgot throttles were on automatic. Speed quickly exceeded 25O KTS.
| Attributes | |
| ACN | 195481 |
| Time | |
| Date | 199111 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : vny airport : bur |
| State Reference | CA |
| Altitude | msl bound lower : 4000 msl bound upper : 4700 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : bur artcc : zoa |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other |
| Flight Plan | IFR |
| 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 : 170 flight time total : 6400 flight time type : 530 |
| ASRS Report | 195481 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : commercial pilot : instrument pilot : atp |
| Experience | flight time last 90 days : 230 flight time total : 3000 flight time type : 350 |
| ASRS Report | 195458 |
| Events | |
| Anomaly | conflict : airborne less severe other anomaly |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 6000 vertical : 400 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
ATC called out traffic at 5500. First officer started leveling off at 4700 because visibility was about 1 mi and we could not see traffic. RA on TCASII gave us a 'descend, descend.' we descended and since the automatic throttle was on we exceeded 250 KTS although the speed bug was set at 250 KTS. We manually pulled back the throttles and resumed climb after the conflict was resolved. We thought the automatic throttle malfunctioned but later realized the automatic throttle will not correct in this situation.
Original NASA ASRS Text
Title: FLC OF MLG COMPLYING WITH TCASII RA TO DSND PUSHED NOSE OVER BUT FORGOT THROTTLES WERE ON AUTO. SPD QUICKLY EXCEEDED 25O KTS.
Narrative: ATC CALLED OUT TFC AT 5500. FO STARTED LEVELING OFF AT 4700 BECAUSE VISIBILITY WAS ABOUT 1 MI AND WE COULD NOT SEE TFC. RA ON TCASII GAVE US A 'DSND, DSND.' WE DSNDED AND SINCE THE AUTO THROTTLE WAS ON WE EXCEEDED 250 KTS ALTHOUGH THE SPD BUG WAS SET AT 250 KTS. WE MANUALLY PULLED BACK THE THROTTLES AND RESUMED CLB AFTER THE CONFLICT WAS RESOLVED. WE THOUGHT THE AUTO THROTTLE MALFUNCTIONED BUT LATER REALIZED THE AUTO THROTTLE WILL NOT CORRECT IN THIS SITUATION.
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.