# SDR UIEA2026102200992

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 22, 2026
- Submitted: October 23, 2026
- Operation: Air carrier
- Aircraft: [N472MC](https://openairdocs.org/aircraft/N472MC), registered now
- Make and model: Boeing 747-45E
- Registry model: [Boeing 747-45E](https://openairdocs.org/model/boeing-747-45e) (OpenAirDocs)
- Aircraft serial: 27062
- Aircraft time: 133,925 hours, 22,735 cycles
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Adc
- Part number: 4040800908
- Part serial: 91082787
- Condition: Faulted
- Location: Zone 200
- Stage of operation: TO
- How discovered: O
- Nature of condition: J
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2026102200992

## Discrepancy

RTO DUE TO MASTER CAUTION ASSOCIATED WITH AN APPERENT ADC-L FAILURE. CAPT PFD LOST AIRSPEED, ALTITUDE + V/S INDICATIONS(<P>R/R LEFT ADC REF AIPC 34-12-01-61 & AMM 34-12-01-004-205. AIR DATA SYSTEM OPS CHECK NORMAL IAW AMM 34-12-00-715-001.</P>)

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