# SDR CALA2026080918413

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 7, 2026
- Submitted: August 10, 2026
- Operation: Air carrier
- Aircraft: [N14250](https://openairdocs.org/aircraft/N14250), registered now
- Make and model: Boeing 737824
- Aircraft serial: 28957
- Aircraft time: 80,378 hours, 30,723 cycles
- System (JASC): [2300 · Communications System](https://openairdocs.org/jasc/2300)
- Part: Control Panel
- Part number: 5145164
- Part serial: 3380
- Condition: Faulty
- Location: Nr 3
- Part time: 28,869 hours, 11,818 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026080918413

## Discrepancy

ON TAKEOFF ROLL RADIOS WENT STATIC THEN LOUD HUM COULD NOT TRANS OR RECEIVE.   DURING T/S NOTED THAT ACP NR 3 VHF 1 MIC SELECTOR SWITCH CHANGE SUDDENLY WITHOUT TOUCHING IT, ACP SWAP WITH FO SIDE, & FAULT CONFIRMED DURING COMMS TEST WITH TOWER & OPS OFFICE. FOUND NR 3 ACP 1VHF SWITCH INTERMITTENT. REPLACED NR 3 ACP IAW AMM 23-51-02-400-801. OPS CHECKED OK.

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