A 4 engine widebody transport, operating on 3 engines, failed to pass on to ARTCC that their true airspeed and mach number would deteriorate from their planned values. Flight plan crossing points were not re-estimated.

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Attributes
ACN	224825
Time
Date	199210
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : ymm
State Reference	AB
Altitude	msl bound lower : 31000 msl bound upper : 31000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 4 Turbojet Eng
Flight Phase	cruise other
Route In Use	enroute airway : czeg
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : cfi pilot : atp
Experience	flight time last 90 days : 160 flight time total : 7500 flight time type : 950
ASRS Report	224825
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : critical non adherence : far non adherence : published procedure
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation other

Narrative:

At about yaam (fort mcmurray), we shut down #1 engine due to an abnormal nacelle temperature indication. After considering all factors, we decided to continue to our destination, anchorage. However, we forgot to notify ATC of our changed TAS and mach number. TAS was 485, it became 435. Mach went from .84 to .75. Also, with the high workload, we missed a few ATC calls. We also used old speed data on our flight plan and therefore gave a few erroneous estimates to fixes which we missed. We should have been less concerned with the upcoming paperwork drill involving the FAA and spent more time on the task at hand.

Original NASA ASRS Text

Title: A 4 ENG WDB, OPERATING ON 3 ENGS, FAILED TO PASS ON TO ARTCC THAT THEIR TRUE AIRSPD AND MACH NUMBER WOULD DETERIORATE FROM THEIR PLANNED VALUES. FLT PLAN XING POINTS WERE NOT RE-ESTIMATED.

Narrative: AT ABOUT YAAM (FORT MCMURRAY), WE SHUT DOWN #1 ENG DUE TO AN ABNORMAL NACELLE TEMP INDICATION. AFTER CONSIDERING ALL FACTORS, WE DECIDED TO CONTINUE TO OUR DEST, ANCHORAGE. HOWEVER, WE FORGOT TO NOTIFY ATC OF OUR CHANGED TAS AND MACH NUMBER. TAS WAS 485, IT BECAME 435. MACH WENT FROM .84 TO .75. ALSO, WITH THE HIGH WORKLOAD, WE MISSED A FEW ATC CALLS. WE ALSO USED OLD SPD DATA ON OUR FLT PLAN AND THEREFORE GAVE A FEW ERRONEOUS ESTIMATES TO FIXES WHICH WE MISSED. WE SHOULD HAVE BEEN LESS CONCERNED WITH THE UPCOMING PAPERWORK DRILL INVOLVING THE FAA AND SPENT MORE TIME ON THE TASK AT HAND.

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.