# SDR UIEA2026030700079

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 7, 2026
- Submitted: March 9, 2026
- Operation: Air carrier
- Aircraft: [N645GT](https://openairdocs.org/aircraft/N645GT), registered now
- Make and model: Boeing 767324
- Aircraft serial: 27393
- Aircraft time: 109,374 hours, 21,290 cycles
- System (JASC): [2300 · Communications System](https://openairdocs.org/jasc/2300)
- Part: Microphone
- Condition: Inoperative
- Location: Oxygen Mask
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2026030700079

## Discrepancy

F/O O2 MASK MIC WOULD NOT TRANSMIT(<P>SWAPPED 2ND OBSERVER O2 ASSY TO F/O. OPS CHECK GOOD. LEAK CHECK GOOD IAW B767 AMM 35-11-51</P>)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.