# SDR DALA2026072804377

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 25, 2026
- Submitted: July 29, 2026
- Operation: Air carrier
- Aircraft: [N315NB](https://openairdocs.org/aircraft/N315NB), registered now
- Make and model: Airbus A319-114
- Registry model: [Airbus A319-114](https://openairdocs.org/model/airbus-a319-114) (OpenAirDocs)
- Aircraft serial: 1230
- Aircraft time: 69,455 hours, 36,110 cycles
- System (JASC): [2300 · Communications System](https://openairdocs.org/jasc/2300)
- Part: Amu
- Part number: AMU2790CB04
- Part serial: 935
- Condition: Failed
- Location: Zone 200
- Part time: 113,737 hours, 17,348 cycles
- Stage of operation: TX
- How discovered: C
- Nature of condition: L
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2026072804377

## Discrepancy

F/O O2 MASK NO AUDIO ON TEST.  R & R AMU IAW AMM 23-51. PERFORMED BITE TEST OF THE AMU IAW AMM 23-51.TEST OK. PERFORMED OPS TEST OF THE O2 MASK MICROPHONE IAW AMM 23-51.OPS TEST GOOD. OK FOR SVC. (LP: 8847368, AIRCRAFT WAS GROUNDED)

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