# SDR KCSA2026042123

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 21, 2026
- Submitted: April 21, 2026
- Operation: Air carrier
- Aircraft: [N744CK](https://openairdocs.org/aircraft/N744CK), registered now
- Make and model: Boeing 747446
- Aircraft serial: 26353
- Aircraft time: 125,050 hours, 22,770 cycles
- System (JASC): [5220 · Emergency Exits](https://openairdocs.org/jasc/5220)
- Part: Battery Pack
- Part number: 900835AB
- Part serial: 108043
- Condition: Discharged
- Location: Zone 800
- Part time: 3,722 hours, 663 cycles
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/KCSA2026042123

## Discrepancy

100320914: RIGHT SIDE UPPER DECK DOOR EMERGENCY OPENING SYS BATTERY PACK DEAD A/T: ITEM TRANSFERRED TO DMI #100320914 CAT C DUE 5/1/26 M PROCEDURE COMPLIED WITH IAW B747 MEL 52-23-1-3A PLACARDS INSTALLED.  REF DMI #100320914 RH UPPER DECK DOOR BATT PACK INOP. CORRECTIVE ACTION: R & R RH UPPER DECK BATTERY CARTRIDGE IAW B747-400 AMM REF 52-23-14, OPS CHECK GOOD, THIS CLEARS DMI #100320914. ALL PLACARD REMOVED.

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