# SDR HNAA2018031600060

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 15, 2018
- Submitted: March 16, 2018
- Operation: Air carrier
- Aircraft: N601DW
- Make and model: Emb EMB-145LR
- Registry model: [EMB EMB-145LR](https://openairdocs.org/model/embraer-emb-145lr) (OpenAirDocs)
- Aircraft serial: 145046
- Aircraft time: 46,131 hours, 39,673 cycles
- System (JASC): [3416 · Altimeter, Barometric/Encoder](https://openairdocs.org/jasc/3416)
- Part: Indicator
- Condition: Malfunctioned
- Location: Altimeter
- Stage of operation: CR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HNAA2018031600060

## Discrepancy

DURING CRUISE ALTITUDE,  THE STBY ALTIMETER WAS INDICATING 1800 FEET LOWER THAN ADC AND THE STBY AIRSPEED INDICATOR WAS 25 KNOTS SLOWER THAN ADC.   R & R THE STANDBY ALTIMETER IAW AMM 34-11-01. OPS CHECKED GOOD.

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