# Proposed AD FAA-2010-0951: Learjet Inc. Model 45 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2011-04-08
- Products: Learjet
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 1, 2010, 75 FR 60667
- Comments due: November 15, 2010
- Became: [AD 2011-04-08](https://openairdocs.org/ad/2011-04-08)
- Docket: FAA-2010-0951 (https://www.regulations.gov/docket/FAA-2010-0951, where comments are filed)
- Project: 2010-NM-107-AD
- FR document: 2010-24713
- Official PDF: https://openairdocs.org/files/sha256/98/8d/988dcaef0d0335eb8b99a2a254cd2e69b1623260ca1efb5c36559b08629daa3a (from https://www.govinfo.gov/content/pkg/FR-2010-10-01/pdf/2010-24713.pdf)
- Federal Register: https://www.federalregister.gov/documents/2010/10/01/2010-24713/airworthiness-directives-learjet-inc-model-45-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D151AB89388C416E862577AF005794C9.0001
- Page: https://openairdocs.org/proposed/FAA-2010-0951

## Summary

We propose to adopt a new airworthiness directive (AD) for all Model 45 airplanes. This proposed AD would require a general visual inspection for damage of wiring (including chafing, pinched wires, and exposed wires) and correct routing of wires in the left and right circuit breaker panels, and related investigative and corrective actions if necessary. This proposed AD results from reports of wire damage on the pilot and copilot circuit breaker panels caused by a short circuit between chafed wires. We are proposing this AD to detect and correct damaged or misrouted wires, which could result in a short circuit and the loss of systems associated with the wiring (including fire suppression function for one engine and essential avionics systems).

## Notices in this docket

- Oct 1, 2010: Notice of proposed rulemaking (NPRM). (first notice), FR document 2010-24713, comments due Nov 15, 2010 (https://www.federalregister.gov/documents/2010/10/01/2010-24713/airworthiness-directives-learjet-inc-model-45-airplanes)

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