# SDR CALA2018021600619

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 16, 2018
- Submitted: February 17, 2018
- Operation: Air carrier
- Aircraft: [N77871](https://openairdocs.org/aircraft/N77871), registered now
- Make and model: Boeing 757-33N
- Registry model: [Boeing 757-33N](https://openairdocs.org/model/boeing-757-33n) (OpenAirDocs)
- Aircraft serial: 33526
- Aircraft time: 41,383 hours, 11,579 cycles
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Air Data Module
- Part number: 60683220U1
- Part serial: 2546
- Condition: Faulty
- Location: First Officer'S
- Part time: 25,536 hours, 9,066 cycles
- Stage of operation: DE
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2018021600619

## Discrepancy

UNRELIABLE AIRSPEED AT FL260.EICAS IAS UNRELIABLE WITH L MACH .79 RMACH IAS L/R 327/347. EMERGENCY DECLARED. REMOVED AND REPLACED THE ADM IAW AMM 34-26-03-004-008 AND -008. PERFORMED  A CAPTAIN`S AND FIRST OFFICERS  PITOT PRESSURE SYSTEM LEAK TEST IAW AMM 34-11-00-795-180. LEAK TESTED GOOD.

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