 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A B727 on approach at 6000 ft and cleared to 5000 ft descended to 4600 ft due to failure to fully retract the extended speed brakes.
| Attributes | |
| ACN | 545038 |
| Time | |
| Date | 200204 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : atl.airport |
| State Reference | GA |
| Altitude | msl bound lower : 4600 msl bound upper : 5000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B727-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Route In Use | arrival : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : multi engine |
| Experience | flight time last 90 days : 200 flight time total : 18000 flight time type : 6000 |
| ASRS Report | 545038 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : far non adherence : published procedure other anomaly other anomaly |
| Independent Detector | aircraft equipment other aircraft equipment : altimeter other flight crewa |
| Resolutory Action | flight crew : overrode automation flight crew : regained aircraft control flight crew : returned to assigned altitude other |
| Supplementary | |
| Problem Areas | ATC Human Performance Aircraft Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
During approach to atl runway 26R, on vectors to intercept localizer, descending to 5000 ft MSL. Autoplt was engaged, altitude capture was armed. Speed was 250 KIAS. Passing 6500 ft, ATC slowed us to 180 KIAS. I deployed the speed brake in descent and decreased the pitch to slow. Rate of descent was decreased from about 1500 FPM to approximately 900-1000 FPM. As the aircraft approached approximately 5200 ft, the green altitude capture light illuminated. First officer stated that 'we're not going to level at 5000 ft.' the airspeed had decreased to 205 KIAS and I started to lower the speed brake so I could deploy the flaps, when the copilot, at 5100 ft, said that we were not going to level at 5000 ft MSL. I took my hand from the speed brake and disconnected the autoplt, increased pitch and added go around power -- all simultaneously. The aircraft continued to descend to 4600 ft as if no input had been applied. I noticed in my hurry to break the descent that I had not fully retracted the speed brake. I then lowered the speed brake handle and the aircraft began to respond. We recovered the altitude and turned back to intercept the localizer.
Original NASA ASRS Text
Title: A B727 ON APCH AT 6000 FT AND CLRED TO 5000 FT DSNDED TO 4600 FT DUE TO FAILURE TO FULLY RETRACT THE EXTENDED SPD BRAKES.
Narrative: DURING APCH TO ATL RWY 26R, ON VECTORS TO INTERCEPT LOC, DSNDING TO 5000 FT MSL. AUTOPLT WAS ENGAGED, ALT CAPTURE WAS ARMED. SPD WAS 250 KIAS. PASSING 6500 FT, ATC SLOWED US TO 180 KIAS. I DEPLOYED THE SPD BRAKE IN DSCNT AND DECREASED THE PITCH TO SLOW. RATE OF DSCNT WAS DECREASED FROM ABOUT 1500 FPM TO APPROX 900-1000 FPM. AS THE ACFT APCHED APPROX 5200 FT, THE GREEN ALT CAPTURE LIGHT ILLUMINATED. FO STATED THAT 'WE'RE NOT GOING TO LEVEL AT 5000 FT.' THE AIRSPD HAD DECREASED TO 205 KIAS AND I STARTED TO LOWER THE SPD BRAKE SO I COULD DEPLOY THE FLAPS, WHEN THE COPLT, AT 5100 FT, SAID THAT WE WERE NOT GOING TO LEVEL AT 5000 FT MSL. I TOOK MY HAND FROM THE SPD BRAKE AND DISCONNECTED THE AUTOPLT, INCREASED PITCH AND ADDED GAR PWR -- ALL SIMULTANEOUSLY. THE ACFT CONTINUED TO DSND TO 4600 FT AS IF NO INPUT HAD BEEN APPLIED. I NOTICED IN MY HURRY TO BREAK THE DSCNT THAT I HAD NOT FULLY RETRACTED THE SPD BRAKE. I THEN LOWERED THE SPD BRAKE HANDLE AND THE ACFT BEGAN TO RESPOND. WE RECOVERED THE ALT AND TURNED BACK TO INTERCEPT THE LOC.
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.