# SDR AALA202610167736

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 16, 2026
- Submitted: October 17, 2026
- Operation: Air carrier
- Aircraft: [N943AN](https://openairdocs.org/aircraft/N943AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 30599
- Aircraft time: 72,265 hours, 30,743 cycles
- System (JASC): [3410 · Flight Environment Data](https://openairdocs.org/jasc/3410)
- Part: Air Data Module
- Part number: C17001BA01
- Condition: Inoperative
- Location: Zone 100
- 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/AALA202610167736

## Discrepancy

AIRCRAFT WAS GROUNDED: EMERGENCY DECLARED; AIRCRAFT LANDED WITHOUT INCIDENT.  AT 35,000 GOT AIRSPEED UNRELIABLE INDICATIONS ON BOTH PFD'S. WENT AWAY, ONLY TO RETURN A FEW MINUTES LATER. FO'S PFD WAS ERRATIC. FINISHED FLIGHT ON CA PFD & STBY INSTRUMENT COINCIDENCE WITH CHARTED POWER SETTINGS & PITCH. EVENT WAS OVER BY 12,000 FEET.  NORMAL LANDING.  REMOVED AND REPLACED FO'S PITOT SYSTEM AIR DATA MODULE IAW AMM 34-21-04.

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