Air carrier medium large transport speed deviation. Non adherence to speed restriction below 10000'.

Attributes
ACN	109569
Time
Date	198904
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : cae
State Reference	SC
Altitude	msl bound lower : 9500 msl bound upper : 9500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	cruise other descent other
Route In Use	enroute airway : cae
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 30 flight time type : 2000
ASRS Report	109569
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	non adherence : far other anomaly
Independent Detector	other flight crewa
Resolutory Action	flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

AFDS/FMC caused aircraft to accelerate to approximately 285K below 10,000' (approximately 9500' MSL). Crew distracted by other duties or corrective action could have been made sooner. There is no alert if AFDS fails. No speed was indicated in window. Could not set bug with AFDS speed knob. Aircraft was flown manually with no other incident.

Original NASA ASRS Text

Title: ACR MLG SPEED DEVIATION. NON ADHERENCE TO SPEED RESTRICTION BELOW 10000'.

Narrative: AFDS/FMC CAUSED ACFT TO ACCELERATE TO APPROX 285K BELOW 10,000' (APPROX 9500' MSL). CREW DISTRACTED BY OTHER DUTIES OR CORRECTIVE ACTION COULD HAVE BEEN MADE SOONER. THERE IS NO ALERT IF AFDS FAILS. NO SPEED WAS INDICATED IN WINDOW. COULD NOT SET BUG WITH AFDS SPEED KNOB. ACFT WAS FLOWN MANUALLY WITH NO OTHER INCIDENT.

Data retrieved from NASA's ASRS site as of August 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.