A B757 crew flying an aircraft with MEL'ed autothrottles; accelerated to an overspeed situation upon...

Attributes
ACN	867250
Time
Date	200912
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	Throttle/Power Level
Person 1
Function	Pilot Flying Captain
Person 2
Function	Pilot Not Flying First Officer
Events
Anomaly	Deviation - Procedural Published Material / Policy Deviation - Speed All Types

Narrative:

We leveled off and before the cruise checklist was initiated; I felt a very slight airframe vibration. This was followed by an aural warning autopilot disconnect. I noticed the annunciated of 'over speed' on the primary engine instrument panel and that the airspeed warning indicator and airspeed indicator were matched. I then retarded the throttle. The over speed warning and slight vibration went away. The autopilot was then reconnected. The autothrottles were inoperative on this flight. Failure to reduce throttles at level off and or failure to run the checklist immediately; caused the problem. The appropriate maintenance entry was made in the logbook.

Original NASA ASRS Text

Title: A B757 crew flying an aircraft with MEL'ed Autothrottles; accelerated to an overspeed situation upon reaching their cruise altitude because they were distracted by chart reading for route verification.

Narrative: We leveled off and before the cruise checklist was initiated; I felt a very slight airframe vibration. This was followed by an aural warning autopilot disconnect. I noticed the annunciated of 'over speed' on the primary engine instrument panel and that the airspeed warning indicator and airspeed indicator were matched. I then retarded the throttle. The over speed warning and slight vibration went away. The autopilot was then reconnected. The autothrottles were inoperative on this flight. Failure to reduce throttles at level off and or failure to run the checklist immediately; caused the problem. The appropriate Maintenance Entry was made in the logbook.

Data retrieved from NASA's ASRS site as of April 2012 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.

A B757 crew flying an aircraft with MEL'ed autothrottles; accelerated to an overspeed situation upon reaching their cruise altitude because they were distracted by chart reading for route verification.