# SDR ASAA2015051611742

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 16, 2015
- Submitted: May 18, 2015
- Operation: Air carrier
- Aircraft: [N464AS](https://openairdocs.org/aircraft/N464AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 40714
- Aircraft time: 3,811 hours, 1,250 cycles
- System (JASC): [2432 · Battery/Charger System](https://openairdocs.org/jasc/2432)
- Part: Charger
- Part number: 893003
- Part serial: C11684
- Condition: Failed
- Location: Master
- Part time: 3,810 hours, 1,249 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2015051611742

## Discrepancy

DURING CLIMBOUT, BATTERY DISCHARGE LIGHT ILLUMINATED.  FOLLOWED QRH PROCEDURE AND RETURNED TO DEPARTURE.  AUX BATTERY SHOWED 0 AMPS AND 28V.  MAIN BATTERY SHOWED -6 AMPS AND 27 VOLTS.  LIGHT EVENTUALLY WENT OUT AND AMPS SLOWLY WENT TO 0 AMPS OVER 20 MIN. VOLTAGE STABILIZED AT 27.  ACFT GROUNDED.   PERFORMED A GVI ON MAIN ACFT BATTERIES AND CHARGERS, NO DEFECTS NOTED.  REPLACED MAIN ACFT BATTERIES AS A PRECAUTION AND MAIN ACFT BATTERIES OPS CHECKED GOOD FOR MAIN AND AUX. IAW AMM TASK 24-31-11-400-802-002. FOUND  MAIN ACFT BATTERY CHARGER GOES INTO A DISCHARGE MODE AFTER COMPLETING A CHARGE MODE.  REPLACED MAIN BATTERY CHARGER IAW AMM TASK 24-31-21. MAIN BATTERY CHARGER OPS NORMAL, IAW AMM TASK 24-31-21-710-801.

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