# Proposed AD 97-CE-46-AD: Pilatus Aircraft Ltd. Models PC-12 and PC-12/45 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 98-08-26
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 19, 1997, 62 FR 66561
- Comments due: February 20, 1998
- Became: [AD 98-08-26](https://openairdocs.org/ad/98-08-26)
- Docket: 97-CE-46-AD
- FR document: 97-33143
- Official PDF: https://openairdocs.org/files/sha256/65/ca/65ca70a52f0d856a7ef2fca2feb6ecca55cf54f479f7363303baddbfbafb982b (from https://www.govinfo.gov/content/pkg/FR-1997-12-19/pdf/97-33143.pdf)
- Federal Register: https://www.federalregister.gov/documents/1997/12/19/97-33143/airworthiness-directives-pilatus-aircraft-ltd-models-pc-12-and-pc-1245-airplanes
- Page: https://openairdocs.org/proposed/97-CE-46-AD

## Summary

This document proposes to adopt a new airworthiness directive (AD) that would apply to certain Pilatus Aircraft Ltd. (Pilatus) Models PC-12 and PC-12/45 airplanes. The proposed action would require installing aluminum bonding bushings over certain screws in certain fuel tank underwing access panels. Several reports from the field revealing fuel tank access panels insufficiently electrically bonded to the airframe prompted this proposed AD. The actions specified by the proposed AD are intended to prevent electrical arcing in the fuel tanks and detonation of the fuel-air mixture, which can be created by poor electrical bonding of fuel tank underwing access panels, and if not corrected, could result in a fire on the airplane.

## Notices in this docket

- Dec 19, 1997: Notice of proposed rulemaking (NPRM). (first notice), FR document 97-33143, comments due Feb 20, 1998 (https://www.federalregister.gov/documents/1997/12/19/97-33143/airworthiness-directives-pilatus-aircraft-ltd-models-pc-12-and-pc-1245-airplanes)

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