# SDR UPS00234458

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 15, 2000
- Submitted: November 20, 2000
- Operation: Air carrier
- Aircraft: N941UP
- Make and model: Boeing 727-22C
- Registry model: [Boeing 727-22C](https://openairdocs.org/model/boeing-727-22c) (OpenAirDocs)
- Aircraft serial: 19196
- System (JASC): [3421 · Attitude Gyro and Indicating System](https://openairdocs.org/jasc/3421)
- Part: Indicator
- Condition: Failed
- Location: Horizon
- Stage of operation: CR
- How discovered: O
- Nature of condition: B
- Precautionary procedure: H
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS00234458

## Discrepancy

INSPECTION TYPE:N/A, DURING FLIGHT F/O EADI SCREEN WENT BLANK FOR APPROX 5 SEC FOLLOWED BY LOUD POP SOUND AND SPARKS VISIBLE DROPPING BEHIND PANEL AT F/O RUDDER PEDDLES.  EADI SCREEN RETURNED TO NORMAL AND ACURID SMELL OF SMOKE IN  COCKPIT FOLLOWED.  PULLED EADI AND EHSI C/B''S ON F/O SIDE AS PRECAUTIONARY.  INSPECTED AND NO SIGNS OF BURNING, ARCHING, DAMAGE.  REMOVED AND REPLACED F/O''S EADI, EHSI AND NR 2 DPUA AS PRECAUTIONARY.

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