# SDR AALA202203090123

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 8, 2022
- Submitted: March 9, 2022
- Operation: Air carrier
- Aircraft: [N943NN](https://openairdocs.org/aircraft/N943NN), registered now
- Make and model: Boeing 737*
- Aircraft serial: 31177
- Aircraft time: 24,396 hours, 9,312 cycles
- System (JASC): [3400 · Navigation System](https://openairdocs.org/jasc/3400)
- Part: Adiru
- Part number: HG2050AC11
- Part serial: 56066557
- Condition: Fault Message
- Location: Zone 100 - Fuse
- Stage of operation: DE
- How discovered: V
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202203090123

## Discrepancy

AIRCRAFT WAS GROUNDED: ON DESCENT INTO BNA, SPEED TRIM FAIL LIGHT ILLUMINATED FOLLOWED 2 MINUTES LATER WITH AN ELECTRICAL BURNING SMELL IN THE COCKPIT. FLIGHT DECLARED AN EMERGENCY, LANDING SAFELY. REPLACED RIGHT ADIRU PER AMM 34-21-01. ACCOMPLISHED SATISFACTORY OPERATIONAL CHECK. ACCOMPLISHED SMOKE ODOR FUME JOB CARD 08L00021001. NO ODOR OR FAULTS NOTED.

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