Airworthiness directives › 2016-16-04
AD 2016-16-04 Airworthiness Directives; Fokker Services B.V. Airplanes
Models named: F.28 Mark 1000, 2000, 3000, 4000. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Fokker Services B.V. Model F.28 Mark 1000, 2000, 3000, and 4000 airplanes, certificated in any category, all serial numbers.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
At the next scheduled opening of the fuel tanks after the effective date of this AD, but no later than 84 months after the effective date of this AD, modify the FQTU in each main wing tank by applying sealant to cover the nuts, washers, and stud ends of the FQTU attachments, and do an inspection for leakage of the tank access panels, in accordance with the Accomplishment Instructions of Fokker Service Bulletin SBF28-28-054, Revision 1, dated January 9, 2014; and the information in Fokker Manual Change Notification—Maintenance Documentation MCNM-F28-037, Rev 1, dated January 9, 2014. If any fuel leakage is found, before further flight, reapply the sealant, in accordance with the Accomplishment Instructions of Fokker Service Bulletin SBF28-28-054, Revision 1, dated January 9, 2014; and the information in Fokker Manual Change Notification—Maintenance Documentation MCNM-F28-037, Rev 1, dated January 9, 2014.
Unsafe condition
This AD was prompted by a design review that revealed insufficient measures were taken to ensure the correct locking of the attachments of the fuel quantity tank units (FQTUs) in each wing tank. When an FQTU becomes loose, this could lead to insufficient clearance between the FQTU and the adjacent tank structure or other metal parts, and under certain conditions, create an ignition source inside the wing fuel vapor space. We are issuing this AD to prevent an ignition source in the wing fuel tank vapor space, which could result in a wing fuel tank explosion and consequent loss of the airplane.
Affected ADs
None.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1