# SDR DALA2026053103305

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 28, 2026
- Submitted: May 31, 2026
- Operation: Air carrier
- Aircraft: [N370NB](https://openairdocs.org/aircraft/N370NB), registered now
- Make and model: Airbus A319-114
- Registry model: [Airbus A319-114](https://openairdocs.org/model/airbus-a319-114) (OpenAirDocs)
- Aircraft serial: 2087
- Aircraft time: 61,249 hours, 31,985 cycles
- System (JASC): [3452 · ATC Transponder System](https://openairdocs.org/jasc/3452)
- Part: Transponder
- Part number: 900800010001
- Part serial: NXE01709
- Condition: Failed
- Location: 002
- Part time: 19,227 hours, 10,219 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2026053103305

## Discrepancy

ATC REPORTED INTERMITTENT MODE C. ALTITUDE REPORTING FAILURES IN ROUTE. ATC TRANSPONDER/AUTOMATIC ALTITUDE REPORT SYS AND A/C VACATED RVSM AIRSPACE. USE FLT AWARE TO VERIFY DATA GAPS FOR THIS FLIGHT. C/A: R/R ATC TRANSPONDER 1 +2 IAW A319 AMM 34-52 BITE TEST PASSED FUNCTION TEST OF ATC/MODE S IAW A319 AMM 34-52 PASSED THIS CLEAR MEL PLACARDS REMOVED NO M PROCEDURES TO RESTORE. (LP: 8904918, AIRCRAFT WAS GROUNDED)

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