Airworthiness Directive · Amendment 39-19509 · Landing gear
Fokker Services B.V. Airplanes
This AD applies to Fokker Services B.V. Model F28 Mark 0070, 0100, 1000, 2000, 3000, and 4000 airplanes, certificated in any category, all manufacturer serial numbers.
We are adopting a new airworthiness directive (AD) for all Fokker Services B.V. Model F28 airplanes. This AD was prompted by reports that filters, which are integral to certain T-unions in the landing gear hydraulic control system, disconnected from their housing and, in some cases, migrated. This AD requires replacing certain T- unions with an integral filter with T-unions without an integral filter. We are issuing this AD to address the unsafe condition on these products.
For the purposes of this AD, the definitions in paragraphs (g)(1) through (g)(3) inclusive apply.
(1) An affected part is any hydraulic T-union with an integral filter, having part number (P/N) QA07596 or P/N QA07597, installed on the production line or introduced in-service by Fokker Service Bulletin SBF100-32-095 or Fokker Service Bulletin SBF28-32-154, as applicable.
(2) Group 1 airplanes are those that have an affected part installed.
(3) Group 2 airplanes are those that do not have an affected part installed.
For Group 1 airplanes, within 24 months after the effective date of this AD, modify the airplane in accordance with the Accomplishment Instructions of Fokker Service Bulletin SBF28-32-166, dated February 21, 2018; or Fokker Service Bulletin SBF100-32-170, dated February 21, 2018; as applicable. The corresponding part numbers of affected (old) parts and replacement (new) parts are specified in figure 1 to paragraph (h) of this AD.
