# SDR DALA2017122008845

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 19, 2017
- Submitted: December 25, 2017
- Operation: Air carrier
- Aircraft: N935DN
- Make and model: Doug MD-90-30
- Registry model: [Doug MD-90-30](https://openairdocs.org/model/mcdonnell-douglas-md-90-30) (OpenAirDocs)
- Aircraft serial: 53460
- Aircraft time: 44,371 hours, 27,911 cycles
- System (JASC): [2450 · AC Power Distribution System](https://openairdocs.org/jasc/2450)
- Part: Electrical Sys
- Condition: Failed
- Stage of operation: NR
- How discovered: 9
- Nature of condition: H
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2017122008845

## Discrepancy

EXPERIENCED A TOTAL LOSS OF ELECTRICAL POWER WHILE BEING VECTORED FOR APPROACH.   MAINTENANCE TROUBLESHOT AND FOUND OHMS FROM GENERATOR TO CEU T-1 270 M OHMS, T-2 157 M OHMS AND T-3 OL.  REMOVED AND REPLACED RIGHT COTA AND CEU IAW MM. REMOVED AND REPLACED EPCU, LEFT CEU, COTA AND HARNESS.  OPERATION CHECKS GOOD.

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