# SDR 9WGA2022091941201

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 19, 2022
- Submitted: September 21, 2022
- Operation: Air carrier
- Aircraft: [N412SN](https://openairdocs.org/aircraft/N412SN), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48412
- Aircraft time: 76,997 hours, 15,778 cycles
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Adc
- Condition: False Indication
- Location: Nr 1-2
- Stage of operation: CL
- How discovered: O
- Nature of condition: N
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9WGA2022091941201

## Discrepancy

AIRCRAFT OVERSPEED MULTIPLE TIMES IN CLIMB, SPEED TAPE DROPPING.  T/S PER FIM 34-63-21 NO FAULT OR FAIL SENSOR SHOWN. PERFORMED ADC #1 & #2 RTS PER AMM 34-16-01. ALL TESTS PASSED, UPDATED FMS SOFTWARE PER AMM 34-63-01.

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