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Aircraft speed was restr to 230 KTS and when flight crew asked if they could increase speed, ATC said 250 KTS maximum. Flight crew assumed the 250 was just below 10000 ft and after 10000 ft increased to profile climb speed. AC intervened and reminded them of the 250 KTS assignment. B727.
| Attributes | |
| ACN | 336490 |
| Time | |
| Date | 199605 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : atl |
| State Reference | GA |
| Altitude | msl bound lower : 12000 msl bound upper : 12000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : ztl |
| Operator | common carrier : air carrier |
| Make Model Name | B727-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute airway : atl |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 19000 flight time type : 2400 |
| ASRS Report | 336490 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 4800 flight time type : 2000 |
| ASRS Report | 336474 |
| Events | |
| Anomaly | non adherence : clearance other anomaly |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
During climb out from atl, heading 280 degrees, approximately 3000 ft MSL, ATC gave us a maximum speed of 230 KTS. We were then given a turn to 360 degrees, altitude approximately 6000 ft MSL. After turning, we asked if ATC still required a speed of 230 KTS. The controller responded, 'no you can go to 250 maximum.' we as a crew assumed 250 KTS below 10000 ft. The copilot responded, 'ok, back to 250 KTS.' normal climb out profile was followed and acceleration at 10000 ft to 325 KTS was started. At approximately 12500 ft a different voice (ATC controller) asked our airspeed. The copilot responded 325 KTS. The controller said he wanted us at 250 KTS. The aircraft was slowed to 250 KIAS and shortly after resumed normal climb out speed as directed by ATC. No conflicts were apparent.
Original NASA ASRS Text
Title: ACFT SPD WAS RESTR TO 230 KTS AND WHEN FLC ASKED IF THEY COULD INCREASE SPD, ATC SAID 250 KTS MAX. FLC ASSUMED THE 250 WAS JUST BELOW 10000 FT AND AFTER 10000 FT INCREASED TO PROFILE CLB SPD. AC INTERVENED AND REMINDED THEM OF THE 250 KTS ASSIGNMENT. B727.
Narrative: DURING CLBOUT FROM ATL, HDG 280 DEGS, APPROX 3000 FT MSL, ATC GAVE US A MAX SPD OF 230 KTS. WE WERE THEN GIVEN A TURN TO 360 DEGS, ALT APPROX 6000 FT MSL. AFTER TURNING, WE ASKED IF ATC STILL REQUIRED A SPD OF 230 KTS. THE CTLR RESPONDED, 'NO YOU CAN GO TO 250 MAX.' WE AS A CREW ASSUMED 250 KTS BELOW 10000 FT. THE COPLT RESPONDED, 'OK, BACK TO 250 KTS.' NORMAL CLBOUT PROFILE WAS FOLLOWED AND ACCELERATION AT 10000 FT TO 325 KTS WAS STARTED. AT APPROX 12500 FT A DIFFERENT VOICE (ATC CTLR) ASKED OUR AIRSPD. THE COPLT RESPONDED 325 KTS. THE CTLR SAID HE WANTED US AT 250 KTS. THE ACFT WAS SLOWED TO 250 KIAS AND SHORTLY AFTER RESUMED NORMAL CLBOUT SPD AS DIRECTED BY ATC. NO CONFLICTS WERE APPARENT.
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.