# SDR AALA202601081069

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 6, 2026
- Submitted: January 8, 2026
- Operation: Air carrier
- Aircraft: [N936NN](https://openairdocs.org/aircraft/N936NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 31176
- Aircraft time: 35,421 hours, 15,532 cycles
- System (JASC): [3420 · Attitude and Direction Data System](https://openairdocs.org/jasc/3420)
- Part: Deu
- Condition: Faulty
- Location: Zone 200 - Fuse
- Stage of operation: CR
- How discovered: O
- Nature of condition: S
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202601081069

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: CAPTAIN SPEED TAPE AND ALTITUDE TAPE AND VVI BLANKED INFLIGHT WITH ALTITUDE AND SPEED ANNUNCIATED ALSO DISPLAY SOURCE 1 ILLUMINATED INFLIGHT. AIRCRAFT DIVERTED TO AND LANDED SAFELY AT ORD. REMOVED AND REPLACED LEFT STATIC AIR DATA MODULE (AALA202601081069) PER AMM 34-21-04. REMOVED AND REPLACED DEU 1 (AALA202601081743), PER AMM 31-62-21. REMOVE AND REPLACED FCC-A (AALA202601089924) AND FCC-B (AALA202601085803), PER AMM 22-11-33. ALL OPERATIONAL CHECK GOOD.

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