Air carrier light transport aircraft equipment problem generator failure with smoke causing diversio...

Attributes
ACN	95639
Time
Date	198810
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : sie
State Reference	NJ
Altitude	msl bound lower : 17000 msl bound upper : 17000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zny
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	cruise 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 : 230 flight time total : 5500 flight time type : 1100
ASRS Report	95639
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 200 flight time total : 2600 flight time type : 1000
ASRS Report	95828
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : declared emergency none taken : unable other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

Light transport operators in us are having a serious problem with aircraft gen bearing failures. In my occurrence I got an aircraft gen failure light shortly after turning on deicing equipment. This was followed by fluctuations in engine and propeller RPM. The F/a then reported thick black smoke coming from left engine nacelle. At this point we shut the left engine and diverted to jfk west/O incident. Our company has been having consistent problems with these aircraft gens made by xxxxx. Callback conversation with reporter revealed the following: there is no gen disconnect. Procedure calls for reducing the load, but that is generally too late and the gen proceeds to disintegrate. Reporter says aircraft power is used only for deice equipment. Supplemental information from acn 95828: our company has 5 light transport's and we've lost over 60 gens in about 18 months.

Original NASA ASRS Text

Title: ACR LTT ACFT EQUIPMENT PROBLEM GENERATOR FAILURE WITH SMOKE CAUSING DIVERSION TO ALTERNATE.

Narrative: LTT OPERATORS IN U.S. ARE HAVING A SERIOUS PROB WITH ACFT GEN BEARING FAILURES. IN MY OCCURRENCE I GOT AN ACFT GEN FAILURE LIGHT SHORTLY AFTER TURNING ON DEICING EQUIP. THIS WAS FOLLOWED BY FLUCTUATIONS IN ENG AND PROP RPM. THE F/A THEN RPTED THICK BLACK SMOKE COMING FROM LEFT ENG NACELLE. AT THIS POINT WE SHUT THE LEFT ENG AND DIVERTED TO JFK W/O INCIDENT. OUR COMPANY HAS BEEN HAVING CONSISTENT PROBS WITH THESE ACFT GENS MADE BY XXXXX. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING: THERE IS NO GEN DISCONNECT. PROC CALLS FOR REDUCING THE LOAD, BUT THAT IS GENERALLY TOO LATE AND THE GEN PROCEEDS TO DISINTEGRATE. RPTR SAYS ACFT PWR IS USED ONLY FOR DEICE EQUIP. SUPPLEMENTAL INFO FROM ACN 95828: OUR COMPANY HAS 5 LTT'S AND WE'VE LOST OVER 60 GENS IN ABOUT 18 MONTHS.

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.

Air carrier light transport aircraft equipment problem generator failure with smoke causing diversion to alternate.