Pilot of large transport deviates from ATC assigned airspeed while on STAR.

Attributes
ACN	112461
Time
Date	198905
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : lax
State Reference	CA
Altitude	msl bound lower : 9000 msl bound upper : 17000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	descent other
Route In Use	arrival other enroute airway : lax
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : flight engineer pilot : instrument pilot : cfi pilot : commercial
Experience	flight time last 90 days : 210 flight time total : 3650 flight time type : 1000
ASRS Report	112461
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : flight engineer pilot : commercial
Experience	flight time last 90 days : 150 flight time total : 13000 flight time type : 4000
ASRS Report	112464
Events
Anomaly	non adherence : clearance other anomaly
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

With a clearance to 9000' MSL and assigned airspeed of 320 KTS, the captain, flying the aircraft, misunderstood the assigned airspeed and slowed to 220 KTS. The first officer and myself (F/east) stated twice that the airspeed assigned was 320 KTS. After confirmation with ATC, the captain increased speed, but only to 270 claiming to the crew that he would have to slow soon anyway. Several aircraft behind had to slow or be given delaying vectors.

Original NASA ASRS Text

Title: PLT OF LGT DEVIATES FROM ATC ASSIGNED AIRSPEED WHILE ON STAR.

Narrative: WITH A CLRNC TO 9000' MSL AND ASSIGNED AIRSPEED OF 320 KTS, THE CAPT, FLYING THE ACFT, MISUNDERSTOOD THE ASSIGNED AIRSPEED AND SLOWED TO 220 KTS. THE F/O AND MYSELF (F/E) STATED TWICE THAT THE AIRSPEED ASSIGNED WAS 320 KTS. AFTER CONFIRMATION WITH ATC, THE CAPT INCREASED SPEED, BUT ONLY TO 270 CLAIMING TO THE CREW THAT HE WOULD HAVE TO SLOW SOON ANYWAY. SEVERAL ACFT BEHIND HAD TO SLOW OR BE GIVEN DELAYING VECTORS.

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.