# SDR BLI2003F00001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 31, 2003
- Submitted: May 16, 2003
- Operation: Air carrier
- Aircraft: [N65AE](https://openairdocs.org/aircraft/N65AE), registered now
- Make and model: Cessna 421B
- Registry model: [Cessna 421B](https://openairdocs.org/model/cessna-421b) (OpenAirDocs)
- Aircraft serial: 421B0953
- Engine: Cont GTSIO520F
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Spacer
- Condition: Wrong Part
- Location: Alternator
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/BLI2003F00001

## Discrepancy

WHILE REPLACING AN ALTERNATOR, NOTICED THAT DRIVE GER RETAINING NUT WOULD NOT RUN DOWN SUFFICIENTLY TO INSTALL SAFETY.  DISCOVERED 2 DIFFERENT SPACER SIZES ON OLD AND NEW AACT.  REMOVED CORRECT SIZE SPACER FROM ANOTHER OHC ALTERNATOR AND INSTALLED.  CONTACTED FACILITY TO INFORM AND ACQUIRE CORRECT REPLACEMENT SPACER.

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