Airworthiness Directive · Amendment 39-18673 · Landing gear
Fokker Services B.V. Airplanes
This AD applies to Fokker Services B.V. airplanes, certificated in any category, as identified in paragraphs (c)(1) and (c)(2) of this AD.
(1) Model F28 Mark 0070 and Mark 0100 airplanes, all serial numbers (S/Ns).
(2) Model F28 Mark 1000, 2000, 3000, and 4000 airplanes, S/Ns 11003 through 11110 inclusive and S/N 11992, modified in service as specified in Fokker Service Bulletin SBF28-32-123; and S/Ns 11111 through 11241 inclusive.
We are adopting a new airworthiness directive (AD) for certain Fokker Services B.V. Model F28 airplanes. This AD was prompted by reports indicating that the main landing gear (MLG) could not be extended and locked down during approach. This AD requires inspection of the restrictor check valve filter screens to detect any degraded or failed filter screens, and installation of serviceable parts. We are issuing this AD to address the unsafe condition on these products.
Within 18 months after the effective date of this AD, do a detailed inspection of the restrictor check valve filter screens to detect any degraded or failed filter screens including dents and missing wire, and install serviceable parts (hydraulic hose assemblies), in accordance with the Accomplishment Instructions of Fokker Service Bulletin SBF28-32-164, dated January 14, 2015 (for Model F28 Mark 1000, 2000, 3000, and 4000 airplanes); or SBF100-32-166, dated January 14, 2015 (for Model F28 Mark 0070 and 0100 airplanes); as applicable. Any affected hydraulic hose assembly must be replaced before further flight after the inspection.
For the purpose of this AD, a serviceable part is a part number (P/N) 97867-1 or P/N 97867-3 hydraulic hose assembly (including the restrictor check valve) that has not previously been installed on an airplane, or a P/N 97867-1 or P/N 97867-3 hydraulic hose assembly (including the restrictor check valve) that has passed an inspection as specified in Fokker Services Component Service Bulletin CSB-32-026.
