Airworthiness Directive · Amendment 39-14084 · Fokker Model F.28 Series Airplanes
Fokker Model F.28 Series Airplanes
This AD applies to all Fokker Model F.28 series airplanes, certificated in any category.
The FAA is adopting a new airworthiness directive (AD) for all Fokker Model F.28 series airplanes. This AD requires a one-time inspection of the area underneath the auxiliary power unit (APU) enclosure to determine if drain tubes in the area are correctly installed and to detect damaged wiring, and corrective action if necessary. This AD is prompted by a report of a fire under the APU enclosure. We are issuing this AD to prevent fuel from accumulating under the APU enclosure, which, in the presence of an ignition source, could result in a fire.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Within 6 months after the effective date of this AD, perform a one-time general visual inspection of the area underneath the APU enclosure to determine if the left- and right-hand engine drain tubes and the APU enclosure drain tube are correctly installed, and to detect any damage, including, but not limited to, chafing of the wiring in the area. Do the inspection in accordance with the Accomplishment Instructions of Fokker Service Bulletin SBF100-49-036 (for Fokker Model F.28 Mark 0070 and 0100 series airplanes); or F28/49-038 (for all other Fokker Model F.28 series airplanes); both dated April 26, 2004; as applicable.
(1) If any drain tube is not correctly installed: Before further flight, correctly install the drain tube and remove any fuel that has accumulated under the APU enclosure, in accordance with the Accomplishment Instructions of the applicable service bulletin.
(2) If any damaged wiring is found: Before further flight, repair the wiring in accordance with the Accomplishment Instructions of the applicable service bulletin.
Note 1: For the purposes of this AD, a general visual inspection is: “A visual examination of an interior or exterior area, installation, or assembly to detect obvious damage, failure, or irregularity. This level of inspection is made from within touching distance unless otherwise specified. A mirror may be necessary to ensure visual access to all surfaces in the inspection area. This level of inspection is made under normally available lighting conditions such as daylight, hangar lighting, flashlight, or droplight and may require removal or opening of access panels or doors. Stands, ladders, or platforms may be required to gain proximity to the area being checked.”
