Airworthiness Directive · Amendment 39-17241 · Landing gear
Fokker Services B.V. Airplanes
Superseded. A later AD replaced this one: AD 2020-04-12. Comply with the one in force.
(1) This AD applies to Fokker Services B.V. Model F.28 Mark 0070 and 0100 airplanes, certificated in any category, all serial numbers, equipped with Goodrich (formerly Menasco, Colt Industries) main landing gear (MLG) units, part numbers (P/N) 41050-7, 41050-8, 41050-9, 41050-10, 41050-11, 41050-12, 41050-13, 41050-14, 41050-15, 41050-16, 41060-1, 41060-2, 41060-3, 41060-4, 41060-5, or 41060-6.
(2) This AD requires revisions to certain operator maintenance documents to include new actions (e.g., inspections). Compliance with these inspections is required by 14 CFR 91.403(c). For airplanes that have been previously modified, altered, or repaired in the areas addressed by these actions, the operator may not be able to accomplish the actions described in the revisions. In this situation, to comply with 14 CFR 91.403(c), the operator must request approval for an alternative method of compliance (AMOC) according to paragraph (m)(1) of this AD. The request should include a description of changes to the required inspections that will ensure the continued operational safety of the airplane.
We are superseding an existing airworthiness directive (AD) for certain Fokker Services B.V. Model F.28 Mark 0070 and 0100 airplanes. That AD currently requires performing a detailed visual inspection for cracks of the pistons on the main landing gear (MLG), and replacing the affected pistons if necessary. This new AD also requires modifying the MLG by installing a piston containing a certain part number, and revising the airplane maintenance program. This AD was prompted by a new modification developed to safeguard the integrity of the MLG assembly and improve surface protection of the affected area of the MLG piston. We are issuing this AD to prevent MLG failure, possibly resulting in loss of control of the airplane during the landing roll- out.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
This paragraph restates the initial inspection required by paragraph (g) of AD 2011-04-01, Amendment 39-16601 (76 FR 8618, February 15, 2011). Within 30 days after March 22, 2011 (the effective date of AD 2011-04-01), do a detailed visual inspection for cracks of the MLG pistons, in accordance with the Accomplishment Instructions of Fokker Service Bulletin SBF100-32-158, dated October 2, 2009.
This paragraph restates the replacement required by paragraph (h) of AD 2011-04-01, Amendment 39-16601 (76 FR 8618, February 15, 2011). If any cracked MLG piston is found during the inspection required by paragraph (g) of this AD, before further flight, replace the affected piston with a serviceable part, in accordance with the Accomplishment Instructions of Fokker Service Bulletin SBF100-32-158, dated October 2, 2009.
Within 120 months, or during a scheduled overhaul of the MLG, whichever occurs first after the effective date of this AD: Modify the MLG by installing a piston containing P/N 41141-5, in accordance with the Accomplishment Instructions of Fokker Service Bulletin SBF100-32-161, dated April 7, 2011. Re-installation of a MLG piston that has been modified and re-identified as P/N 41141-5, in accordance with the Accomplishment Instructions of Goodrich Service Bulletin 41000-32-29, dated November 10, 2010, is an optional method of compliance for the requirements specified in paragraph (i) of this AD. It is acceptable to operate an airplane with one MLG having a P/N 41141-5 piston installed, and the other MLG having a P/N 41141-3 piston installed, provided all MLG P/N 41141-3 are replaced within the compliance times specified in paragraph (i) of this AD.
After 120 months after the effective date of this AD: No person may install a MLG piston, P/N 41141-3, or a MLG unit equipped with a MLG piston P/N 41141-3, on any airplane.
Within 2 months after the effective date of this AD: Revise the airplane maintenance program by incorporating Task 321100-01-16, Inspection of MLG Piston, and associated thresholds and intervals described in Fokker Report, SE-623, Fokker 70/100 Airworthiness Limitation Items and Safe Life Items, Issue 8, dated December 20, 2010. The initial compliance time for Task 321100-01-16 is within 2 months after the effective date of this AD.
After accomplishing the revisions required by paragraph (k) of this AD, no alternative actions (e.g., inspections) or intervals may be used other than those specified in Fokker Report, SE-623, Fokker 70/100 Airworthiness Limitation Items and Safe Life Items, Issue 8, dated December 20, 2010, unless the actions and intervals are approved as an AMOC in accordance with the procedures specified in paragraph (m)(1) of this AD.
