# Proposed AD 98-NM-364-AD: Fokker Model F27 Series Airplanes Equipped with Rolls-Royce 532-7 ``Dart 7'' (RDa-7) Series Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 99-18-22
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 23, 1999, 64 FR 19940
- Comments due: May 24, 1999
- Became: [AD 99-18-22](https://openairdocs.org/ad/99-18-22)
- Docket: 98-NM-364-AD
- FR document: 99-10184
- Official PDF: https://openairdocs.org/files/sha256/1c/74/1c7456a26c2f01764fe4b4c88e065f87c37d68e49a045330e7c2389a0586bab8 (from https://www.govinfo.gov/content/pkg/FR-1999-04-23/pdf/99-10184.pdf)
- Federal Register: https://www.federalregister.gov/documents/1999/04/23/99-10184/airworthiness-directives-fokker-model-f27-series-airplanes-equipped-with-rolls-royce-532-7-dart-7
- Page: https://openairdocs.org/proposed/98-NM-364-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Fokker Model F27 series airplanes. This proposal would require a revision to the Airplane Flight Manual (AFM) to provide the flightcrew with modified operational procedures to ensure continuous operation with the high pressure cock (HPC) levers in the lockout position. This proposal is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by the proposed AD are intended to prevent overspeed and burnout of the engines during flight by ensuring that the HPC levers are in a permanent lockout position.

## Notices in this docket

- Apr 23, 1999: Notice of proposed rulemaking (NPRM). (first notice), FR document 99-10184, comments due May 24, 1999 (https://www.federalregister.gov/documents/1999/04/23/99-10184/airworthiness-directives-fokker-model-f27-series-airplanes-equipped-with-rolls-royce-532-7-dart-7)

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