<< >> NASA ASRS Report 1518061, February 2018

B737 flight crew reported the number 1 idg failed during cruise resulting in a precautionary diversion landing.

Attributes
ACN	1518061
Time
Date	201802
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	IMC
Light	Dusk
Aircraft 1
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	AC Generator/Alternator
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 12 Flight Crew Type 17000
Person 2
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

Cruising at FL360; the number 1 idg (integrated drive generator) light illuminated. We completed the 'drive' light checklist. The APU would not start and the 'fault' light illuminated on three start attempts. On each attempt the 'fault' light illuminated at the end of the start sequence and extinguished when the start switch was turned off. Two attempts were made at FL360; more than 90 seconds apart. The third attempt was made approximately 10 minutes later while descending through FL290 with the same result. Post flight showed almost zero oil quantity in the idg and oil dripping from the number 1 engine cowling.

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Original NASA ASRS Text

Title: B737 flight crew reported the number 1 IDG failed during cruise resulting in a precautionary diversion landing.

Narrative: Cruising at FL360; the number 1 IDG (Integrated Drive Generator) light illuminated. We completed the 'DRIVE' light checklist. The APU would not start and the 'FAULT' light illuminated on three start attempts. On each attempt the 'FAULT' light illuminated at the end of the start sequence and extinguished when the start switch was turned off. Two attempts were made at FL360; more than 90 seconds apart. The third attempt was made approximately 10 minutes later while descending through FL290 with the same result. Post flight showed almost zero oil quantity in the IDG and oil dripping from the number 1 engine cowling.

Data retrieved from NASA's ASRS site 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.