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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Speed restr of 250 KTS below 10000 ft violated. PIC was flying and the first officer was on the PA when aircraft went to 9700 ft. PIC recovered and slowed. Aci on jump seat, observing.
| Attributes | |
| ACN | 373290 |
| Time | |
| Date | 199706 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : bna |
| State Reference | TN |
| Altitude | msl bound lower : 9700 msl bound upper : 10000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zme |
| Operator | common carrier : air carrier |
| Make Model Name | B737-400 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | descent other |
| Route In Use | arrival other arrival star : star enroute airway : zme |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 190 flight time total : 10000 flight time type : 1300 |
| ASRS Report | 373290 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 200 flight time total : 8000 flight time type : 4700 |
| ASRS Report | 373382 |
| Events | |
| Anomaly | non adherence : far other anomaly other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : became reoriented other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Aircraft inadvertently descended approximately 300 ft below 10000 ft MSL at 280 KTS. I climbed back to 10000 ft until airspeed dropped below 250 KTS, then I continued descent to 6000 ft. Supplemental information from acn 373382: during our descent into bna from clt, I was giving the (thanks for flying us) speech when I felt the airplane in a pull up. We were cleared down to 6000 ft or 7000 ft. We were at 9700 ft in a slight climb to 10000 ft, and airspeed of 290 KTS. When we had slowed to 250 KTS, we once again began our descent without a problem to the cleared altitude. This was the captain's leg and there was an air carrier inspector in the jump seat. I try to start the announcement before 10000 ft so I'm back in the loop under 10000 ft. I was about 400 ft short this time and it got me. I'll try harder to be aware of the 10000 ft speed restrs.
Original NASA ASRS Text
Title: SPD RESTR OF 250 KTS BELOW 10000 FT VIOLATED. PIC WAS FLYING AND THE FO WAS ON THE PA WHEN ACFT WENT TO 9700 FT. PIC RECOVERED AND SLOWED. ACI ON JUMP SEAT, OBSERVING.
Narrative: ACFT INADVERTENTLY DSNDED APPROX 300 FT BELOW 10000 FT MSL AT 280 KTS. I CLBED BACK TO 10000 FT UNTIL AIRSPD DROPPED BELOW 250 KTS, THEN I CONTINUED DSCNT TO 6000 FT. SUPPLEMENTAL INFO FROM ACN 373382: DURING OUR DSCNT INTO BNA FROM CLT, I WAS GIVING THE (THANKS FOR FLYING US) SPEECH WHEN I FELT THE AIRPLANE IN A PULL UP. WE WERE CLRED DOWN TO 6000 FT OR 7000 FT. WE WERE AT 9700 FT IN A SLIGHT CLB TO 10000 FT, AND AIRSPD OF 290 KTS. WHEN WE HAD SLOWED TO 250 KTS, WE ONCE AGAIN BEGAN OUR DSCNT WITHOUT A PROB TO THE CLRED ALT. THIS WAS THE CAPT'S LEG AND THERE WAS AN ACR INSPECTOR IN THE JUMP SEAT. I TRY TO START THE ANNOUNCEMENT BEFORE 10000 FT SO I'M BACK IN THE LOOP UNDER 10000 FT. I WAS ABOUT 400 FT SHORT THIS TIME AND IT GOT ME. I'LL TRY HARDER TO BE AWARE OF THE 10000 FT SPD RESTRS.
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.