# Proposed AD FAA-2017-0194: PILATUS AIRCRAFT LTD. Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2017-11-16
- Products: Pilatus
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 21, 2017, 82 FR 14488
- Comments due: May 5, 2017
- Became: [AD 2017-11-16](https://openairdocs.org/ad/2017-11-16)
- Docket: FAA-2017-0194 (https://www.regulations.gov/docket/FAA-2017-0194, where comments are filed)
- Project: 2017-CE-006-AD
- FR document: 2017-05160
- Official PDF: https://openairdocs.org/files/sha256/4d/3f/4d3fbe57dfa5ce1a976bbc5ff7ed1188322164425f9c7bc0b70ee64aad1a3f7d (from https://www.govinfo.gov/content/pkg/FR-2017-03-21/pdf/2017-05160.pdf)
- Federal Register: https://www.federalregister.gov/documents/2017/03/21/2017-05160/airworthiness-directives-pilatus-aircraft-ltd-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B2BD726337984031862580EA0050552C.0001
- Page: https://openairdocs.org/proposed/FAA-2017-0194

## Summary

We propose to adopt a new airworthiness directive (AD) for PILATUS AIRCRAFT LTD. Model PC-12/47E airplanes. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as an error within the flight management system caused by installing Primus APEX software Build 10 or 10.9, which could cause deviation from the correctly calculated barometric vertical navigation nominal glide path. We are issuing this proposed AD to require actions to address the unsafe condition on these products.

## Notices in this docket

- Mar 21, 2017: Notice of proposed rulemaking (NPRM). (first notice), FR document 2017-05160, comments due May 5, 2017 (https://www.federalregister.gov/documents/2017/03/21/2017-05160/airworthiness-directives-pilatus-aircraft-ltd-airplanes)

---
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.