# SDR 2005FA0000528

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 25, 2005
- Submitted: March 25, 2005
- Operation: General aviation
- System (JASC): [3420 · Attitude and Direction Data System](https://openairdocs.org/jasc/3420)
- Part: Motor
- Part number: 2300626020
- Condition: Intermittent
- Location: Indicator
- Component: Attitude Direct, Collins, ADI85A
- Component part number: 6224808004
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2005FA0000528

## Discrepancy

MOTORS HAVE HIGH RESISTANCE BETWEEN THE BRUSHES AND ARMATURE OF THE MOTOR. THIS CAUSES THE MOTOR TO STICK INTERMITTENTLY, CAUSING A FALSE ATTITUDE DISPLAY IN THE COCKPIT. THIS PROBLEM BEGAN WITH MOTORS DATE CODED 04/04.  THIS MOTOR WAS VERY NOISY IN OPERATION ALSO.  BEARINGS SOUND ROUGH WHILE MOTOR IS OPERATING.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.