# SDR CA990308007

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 14, 1999
- Submitted: March 26, 2000
- Operation: General aviation
- Make and model: Cessna 172R
- Registry model: [Cessna 172R](https://openairdocs.org/model/cessna-172r) (OpenAirDocs)
- System (JASC): [2297 · Auto Flight System Wiring](https://openairdocs.org/jasc/2297)
- Part: Wire
- Condition: Chafed
- Location: Autopilot
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA990308007

## Discrepancy

(CAN) AUTOPILOT WOULD NOT ENGAGE.  FOUND THE A/P DISCONNECT WIRING OPEN FROM THE DISCONNECT SWITCH TO THE A/P COMPUTER.  BROKEN WIRE BEHIND INSTRUMENT PANEL.  WIRING BUNDLE CHAFING BEHIND PILOT'S PANEL.

---
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.