# Proposed AD FAA-2011-0568: Fokker Services B.V. Model F.27 Mark 050, 200, 300, 400, 500, 600, and 700 Airplanes; and Model F.28 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2011-21-01
- Products: Fokker Services
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 21, 2011, 76 FR 36011
- Comments due: August 5, 2011
- Became: [AD 2011-21-01](https://openairdocs.org/ad/2011-21-01)
- Docket: FAA-2011-0568 (https://www.regulations.gov/docket/FAA-2011-0568, where comments are filed)
- Project: 2011-NM-010-AD
- FR document: 2011-15360
- Official PDF: https://openairdocs.org/files/sha256/21/8d/218d65f349c785a73bfec5baa03b3a831a11c1126c89e828c5bd1c4ac55ce68f (from https://www.govinfo.gov/content/pkg/FR-2011-06-21/pdf/2011-15360.pdf)
- Federal Register: https://www.federalregister.gov/documents/2011/06/21/2011-15360/airworthiness-directives-fokker-services-bv-model-f27-mark-050-200-300-400-500-600-and-700-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CA6CEBD4C16F08F2862578B60046F1DD.0001
- Page: https://openairdocs.org/proposed/FAA-2011-0568

## Summary

We propose to adopt a new airworthiness directive (AD) for the products listed above. 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:

[T]he Federal Aviation Administration (FAA) has published Special Federal Aviation Regulation (SFAR) 88, and the Joint Aviation Authorities (JAA) has published Interim Policy INT/POL/25/ 12. The review conducted by Fokker Services on the Fokker F27 and F28 type designs in response to these regulations revealed that, under certain failure conditions, a short circuit can develop in the fuel pilot valve solenoid or in the wiring to the solenoid. Such a short circuit may result in an ignition source in the wing tank vapour space.

This condition, if not corrected, could result in a wing fuel tank explosion and consequent loss of the aeroplane.

* * * * *

The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.

## Notices in this docket

- Jun 21, 2011: Notice of proposed rulemaking (NPRM). (first notice), FR document 2011-15360, comments due Aug 5, 2011 (https://www.federalregister.gov/documents/2011/06/21/2011-15360/airworthiness-directives-fokker-services-bv-model-f27-mark-050-200-300-400-500-600-and-700-airplanes)

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