# SDR AALA202608194487

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 18, 2026
- Submitted: August 20, 2026
- Operation: Air carrier
- Aircraft: [N187US](https://openairdocs.org/aircraft/N187US), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1704
- Aircraft time: 77,782 hours, 30,318 cycles
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Idg
- Part number: 740119H
- Part serial: 3530
- Condition: Overheated
- Location: Zone 400
- Stage of operation: CR
- How discovered: O
- Nature of condition: M
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202608194487

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED INTO ORD DUE TO THE FLIGHT CREW REPORTING THAT THE LEFT ENGINE IDG OIL OVERHEAT MESSAGE DISPLAYED AT CRUISE WHICH RESULTED IN THE FLIGHT CREW DISCONNECTING THE IDG - THE AIRCRAFT LANDED SAFELY AT ORD AND TAXIED TO THE GATE UNDER ITS OWN POWER - MAINTENANCE REPLACED THE LEFT ENGINE IDG PER JOB CARD 26L40024001

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.