# SDR CALA2026050716048

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 4, 2026
- Submitted: May 7, 2026
- Operation: Air carrier
- Aircraft: [N206UA](https://openairdocs.org/aircraft/N206UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 30212
- Aircraft time: 107,785 hours, 14,068 cycles
- System (JASC): [2400 · Electrical Power System](https://openairdocs.org/jasc/2400)
- Part: Relay
- Part number: 406171385
- Condition: Faulty
- Location: Zone 100
- Stage of operation: NR
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026050716048

## Discrepancy

GROUND HORN ALARM KEEPS GOING OFF WITH A/C POWER OFF AND GROUND POWER DISCONNECTED REFERENCE WDM 24-33-21-1, REMOVED RELAY K24019 IN P310 PANEL AND HORN STOPPED.   RELAY IS DAMAGED AND SMELLS BURNT.   OLD RELAY IS IN COCKPIT AND P310 PANEL IS OPENED.  AIRCRAFT IS DEPOWERED AND TAGGED REPLACED GROUND POWER BATTERY RELAY REF AMM 24-33-07. REMOVED LOCKOUT TAGS AND CLOSED P310 PANEL. OPS CHECK FOR RELAY IS GOOD AT THIS TIME. NO GROUND HORN AFTER AIRCRAFT SHUTDOWN.

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