A B737-300 in climb at FL190 declared an emergency and diverted due to #1 generator drive over temperature indication. Engine operated at idle.

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Attributes
ACN	626703
Time
Date	200408
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl single value : 19000
Environment
Flight Conditions	VMC
Aircraft 1
Controlling Facilities	artcc : zzz.artcc
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 240 flight time total : 12000 flight time type : 650
ASRS Report	626703
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : commercial pilot : instrument
Experience	flight time last 90 days : 150 flight time total : 4500 flight time type : 1600
ASRS Report	626702
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : #1 cso temperature indicator other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance flight crew : declared emergency flight crew : diverted to another airport
Consequence	other
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance Maintenance Human Performance
Primary Problem	Aircraft

Narrative:

In departure climb through FL190, master caution panel 'electric' light and master caution light illuminated. Observed #1 generator drive oil temperature gauge pegged full scale in yellow band. Captain (PNF) ran 7-54 irregular checklist for generator drive low oil pressure or high oil temperature. After disconnecting #1 generator CSD (constant speed drive), residual volts showed 8 and CSD oil temperature remained pegged. Repeated disconnect per irregular checklist note. Residual volts still showed 8 and CSD oil temperature pegged. Attempted ACARS 'call me.' poor connection with dispatch and maintenance controller did not allow coordination. Declared emergency with center and requested return to ZZZ1. Briefed purser for cabin advisory. Briefed passenger by PA. Concluded coordination with dispatch and maintenance controller as best possible by ACARS text messages. Retarded #1 engine throttle to idle. Monitored #1 engine parameters. Briefed and flew single engine approach and land to visual by first officer. Shut down #1 engine clearing runway. Taxied to gate and deplaned. Made logbook entry.

Original NASA ASRS Text

Title: A B737-300 IN CLB AT FL190 DECLARED AN EMER AND DIVERTED DUE TO #1 GENERATOR DRIVE OVER TEMP INDICATION. ENG OPERATED AT IDLE.

Narrative: IN DEP CLB THROUGH FL190, MASTER CAUTION PANEL 'ELECTRIC' LIGHT AND MASTER CAUTION LIGHT ILLUMINATED. OBSERVED #1 GENERATOR DRIVE OIL TEMP GAUGE PEGGED FULL SCALE IN YELLOW BAND. CAPT (PNF) RAN 7-54 IRREGULAR CHKLIST FOR GENERATOR DRIVE LOW OIL PRESSURE OR HIGH OIL TEMP. AFTER DISCONNECTING #1 GENERATOR CSD (CONSTANT SPD DRIVE), RESIDUAL VOLTS SHOWED 8 AND CSD OIL TEMP REMAINED PEGGED. REPEATED DISCONNECT PER IRREGULAR CHKLIST NOTE. RESIDUAL VOLTS STILL SHOWED 8 AND CSD OIL TEMP PEGGED. ATTEMPTED ACARS 'CALL ME.' POOR CONNECTION WITH DISPATCH AND MAINT CTLR DID NOT ALLOW COORD. DECLARED EMER WITH CTR AND REQUESTED RETURN TO ZZZ1. BRIEFED PURSER FOR CABIN ADVISORY. BRIEFED PAX BY PA. CONCLUDED COORD WITH DISPATCH AND MAINT CTLR AS BEST POSSIBLE BY ACARS TEXT MESSAGES. RETARDED #1 ENG THROTTLE TO IDLE. MONITORED #1 ENG PARAMETERS. BRIEFED AND FLEW SINGLE ENG APCH AND LAND TO VISUAL BY FO. SHUT DOWN #1 ENG CLRING RWY. TAXIED TO GATE AND DEPLANED. MADE LOGBOOK ENTRY.

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.