# SDR IPXA2023051593222

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 12, 2023
- Submitted: May 15, 2023
- Operation: Air carrier
- Aircraft: [N252UP](https://openairdocs.org/aircraft/N252UP), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48768
- Aircraft time: 63,986 hours, 15,179 cycles
- System (JASC): [2400 · Electrical Power System](https://openairdocs.org/jasc/2400)
- Part: Power Unit
- Part number: NA
- Part serial: NA
- Condition: No Test
- 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/IPXA2023051593222

## Discrepancy

INSPECTION TYPE:NACREW REPORTED EMERGENCY POWER TEST FAIL ON PRE-FLIGHTFOUND BATTERY CHARGING WITH EMERGENCY POWER ON. FOUND CHARGER/BATTERY R2-24 X1 INTERNALLY SHORTED HOLDING RELAY IN CHARGE POSITION. REPLACED R2-29 PER MM 24-34-01. TESTS GOOD. ESR: EQUIP LIST R224

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