# SDR G1IA20230314040

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 14, 2023
- Submitted: April 5, 2023
- Operation: Air carrier
- Aircraft: [N35HD](https://openairdocs.org/aircraft/N35HD), registered now
- Make and model: Beech C90A
- Registry model: [Beech C90A](https://openairdocs.org/model/beech-c90a) (OpenAirDocs)
- Aircraft serial: LJ1731
- Aircraft time: 4,275 hours, 7,314 cycles
- System (JASC): [3400 · Navigation System](https://openairdocs.org/jasc/3400)
- Part: Dpu
- Part number: 6229682004
- Part serial: GFPC
- Condition: Abnormal
- Stage of operation: CR
- How discovered: O
- Nature of condition: I
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/G1IA20230314040

## Discrepancy

EADI AND EHSI DISPLAYS INDICATED ONLY RANDOM DOTS ON THE DISPLAYS. AFTER A WHILE, THE NORMAL DISPLAY RESUMED. THEN, BOTH DISPLAYS BECAME EXTREMELY DISTORTED AND REMAINED THAT WAY FOR THE DURATION OF THE FLIGHT. REPLACED DPU WITH OVERHAULED.

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