# SDR IPXA2024050251161 - Type: Service difficulty report (as reported; unverified) - Difficulty date: April 30, 2024 - Submitted: May 2, 2024 - Operation: Air carrier - Aircraft: [N274UP](https://openairdocs.org/aircraft/N274UP), registered now - Make and model: Doug MD-11F - Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs) - Aircraft serial: 48575 - Aircraft time: 77,036 hours, 16,736 cycles - System (JASC): [2560 · Emergency Equipment](https://openairdocs.org/jasc/2560) - Part: Battery - Condition: Faulted - Location: Emergency Power - Stage of operation: IN - How discovered: 9 - Nature of condition: O - Precautionary procedure: K - FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/) - Page: https://openairdocs.org/sdr/IPXA2024050251161 ## Discrepancy DURING PREFLIGHT EMERGENCY POWER TEST FAILED. IRU 1 ON BAT ILLUMINATED. REMOVED AND REPLACED EPCU REF MM 24-08-01. R-T-S PASS REF MM 24-08-01. EMERGENCY POWER TEST PASSED SEVERAL TIMES WITH NO FAULTS NOTED. TESTED ALL IRU€™S REF MM 34-43-00-700-803, NO FAULTS NOTED. FOUND FLUCTUATING BATTERY CHARGING, REMOVED AND REPLACED MAIN BATTERY CHARGER REF MM 24-34-03. TESTS NORMAL.
TESTED RCCB B1-138, NO VOLTAGE DROP NOTED. OK TO CONTINUE. --- 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.