Air carrier widebody transport had to shut engine down due to an overheated CSD that would not disconnect. Aircraft lost altitude before clearance received. Flight crew was using HF commercial radio causing some delay in getting clearance to lower altitude.

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Attributes
ACN	166469
Time
Date	199012
Day	Thu
Local Time Of Day	0001 To 0600
Place
Locale Reference	atc facility : hnl
State Reference	HI
Altitude	msl bound lower : 28500 msl bound upper : 31000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zoa
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 4 Turbojet Eng
Navigation In Use	Other
Flight Phase	cruise other
Route In Use	enroute : other oceanic enroute : pacific enroute other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 18000
ASRS Report	166469
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical altitude deviation : excursion from assigned altitude
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : declared emergency flight crew : overcame equipment problem other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

Engine fire warning in #3 engine due to overheat. CSD out of limits and would not disconnect. Engine shutdown and aircraft returned to hnl. Altitude was lost due to being unable to maintain assigned altitude 31000' to 28500'. Communication was HF though hnl and others causing delay in receiving lower altitude clearance.

Original NASA ASRS Text

Title: ACR WDB HAD TO SHUT ENGINE DOWN DUE TO AN OVERHEATED CSD THAT WOULD NOT DISCONNECT. ACFT LOST ALT BEFORE CLRNC RECEIVED. FLT CREW WAS USING HF COMMERCIAL RADIO CAUSING SOME DELAY IN GETTING CLRNC TO LOWER ALT.

Narrative: ENG FIRE WARNING IN #3 ENG DUE TO OVERHEAT. CSD OUT OF LIMITS AND WOULD NOT DISCONNECT. ENG SHUTDOWN AND ACFT RETURNED TO HNL. ALT WAS LOST DUE TO BEING UNABLE TO MAINTAIN ASSIGNED ALT 31000' TO 28500'. COM WAS HF THOUGH HNL AND OTHERS CAUSING DELAY IN RECEIVING LOWER ALT CLRNC.

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.