# SDR MALA976672

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 24, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N420XJ
- Make and model: Saab 340B
- Registry model: [Saab 340B](https://openairdocs.org/model/saab-340b) (OpenAirDocs)
- Aircraft serial: 420
- System (JASC): [3425 · Integrated Flight System](https://openairdocs.org/jasc/3425)
- Part: Ahrs
- Condition: Malfunctioned
- Location: Nr 1
- Stage of operation: CL
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/MALA976672

## Discrepancy

DURING INITIAL CLIMB BOTH NR 1 AND NR 2 EHSI SHOWED 30 OFF FROM ATC.  RED FLAG ON NR 1'S RMI CYCLED ON/OFF, THEN NR 1 EHSI HAD RED HEADING FLAG AND NR 2 RMI HAD RED FLAG CYCLED ON/OFF THEN YELLOW HEADING FLAG COMPARATOR CYCLED ON/OFF.  IT EXTINGUISHED WITHOUT CREW ACTION AND DURING TURN TO FINAL BOTH NR 1 AND NR 2 EHSI AND RMI ROTATED TO CORRECT HEADING.  MAINTENANCE REINITALIZED NR 1 AHRS SYSTEM.  ALL CHECKS GOOD IAW SAAB MM CH 34.

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