Airworthiness Directive · Amendment 39-15564 · Powerplant
Fokker Model F27 Mark 050 Airplanes
This AD applies to Fokker Model F27 Mark 050 airplanes, certificated in any category, all serial numbers.
We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
Unless already done, do the following actions.
(1) Within 2 months after the effective date of this AD, inspect the engine mounting frames to identify those that have any sideways deviations in the welds, in accordance with Part 3 of the Accomplishment Instructions of Fokker Service Bulletin SBF50-71-048, dated May 30, 2005. When deviations are found that are less than or equal to 2.0 mm, no further action is required on that frame and the aircraft may be returned to service.
(2) When, during the inspection required by paragraph (f)(1) of this AD, deviations are found that are greater than 2.0 mm but less than or equal to 2.5 mm on any of the welds of the engine mounting frame, except those of tubes 7, 8, and 12 of the rear frame: Within 12 months after the effective date of this AD, NDT (non-destructive test) inspect the affected frame tubes in accordance with Part 3 of the Accomplishment Instructions of Fokker Service Bulletin SBF50-71-049, dated October 25, 2005.
(3) When, during the inspection required by paragraph (f)(1) of this AD, deviations are found that are greater than 2.5 mm but less than or equal to 3.0 mm on any of the welds of the engine mounting frame, except those of tubes 7, 8, and 12 of the rear frame: Within 9 months after the effective date of this AD, NDT-inspect the affected frame tubes in accordance with Part 3 of the Accomplishment Instructions of Fokker Service Bulletin SBF50-71-049, dated October 25, 2005.
(4) When, during the inspection required by paragraph (f)(1) of this AD, deviations are found that are greater than 3.0 mm but less than or equal to 3.5 mm on any of the welds of the engine mounting frame, except those of tubes 7, 8, and 12 of the rear frame: Within 6 months after the effective date of this AD, NDT-inspect the affected frame tubes in accordance with Part 3 of the Accomplishment Instructions of Fokker Service Bulletin SBF50-71-049, dated October 25, 2005.
(5) When, during the inspection required by paragraph (f)(1) of this AD, deviations are found that are greater than 3.5 mm but less than or equal to 5.0 mm on any of the welds of the engine mounting frame, except those of tubes 7, 8, and 12 of the rear frame: Within 3 months after the effective date of this AD, NDT-inspect the affected frame tubes in accordance with Part 3 of the Accomplishment Instructions of Fokker Service Bulletin SBF50-71-049, dated October 25, 2005.
(6) When, during the inspection required by paragraph (f)(1) of this AD, deviations are found that are greater than 2.0 mm but less than or equal to 5.0 mm on tubes 7, 8, and 12 of the rear frame: Within 3 months after the effective date of this AD, NDT-inspect the affected frame tubes in accordance with Part 3 of the Accomplishment Instructions of Fokker Service Bulletin SBF50-71-049, dated October 25, 2005.
(7) Within 7 days after doing any NDT-inspection required by this AD, or within 30 days after the effective date of this AD, whichever occurs later, report all findings to Fokker Services B.V., Technical Services Dept., P.O. Box 231, 2150 AE Nieuw-Vennep, the Netherlands.
(8) Within 30 days after reporting in accordance with paragraph (f)(7) of this AD, or within 30 days after the effective date of this AD, whichever occurs later, repair any frame deviation in accordance with a method approved by the Manager, International Branch, ANM-116, Transport Airplane Directorate, FAA, or by the European Aviation Safety Agency (EASA) (or its designated agent).
(9) When, during the inspection required by paragraph (f)(1) of this AD, deviations are found exceeding 5 mm, before further flight, report the inspection findings to Fokker Services B.V., Technical Services Dept., P.O. Box 231, 2150 AE Nieuw-Vennep, the Netherlands, and repair any such deviation in accordance with a method approved by the Manager, International Branch, ANM-116, Transport Airplane Directorate, FAA, or by EASA (or its designated agent).
(10) Except as provided by paragraphs (f)(10)(i), (f)(10)(ii), (f)(10)(iii), (f)(10)(iv), and (f)(10)(v) of this AD, as of the effective date of this AD, no person may install an engine mounting frame having part number F8200-035-427/-441/-451/-463 (forward frames); F8200-035-425/-443 (A-frames); or F8200-035-403/-439/-449/-461 (rear frames), as a replacement part, unless it has been inspected and found to have deviations less than or equal to 2.0 mm, in accordance with the requirements of Fokker Component Service Bulletin F8200-035-71-10, dated May 30, 2005.
(i) Any frame inspected in accordance with Fokker Component Service Bulletin F8200-035-71-10, and found to have any deviation greater than 2.0 mm but less than or equal to 2.5 mm on any tube, except tubes 7, 8, and 12 of the rear frame, is acceptable for installation. However, if a frame is installed in accordance with this paragraph, it must be NDT-inspected within 12 months after the installation, in accordance with Part 3 of the Accomplishment Instructions of Fokker Service Bulletin SBF50-71-049, dated October 25, 2005.
(ii) Any frame inspected in accordance with Fokker Component Service Bulletin F8200-035-71-10, and found to have any deviation greater than 2.5 mm but less than or equal to 3.0 mm on any tube, except tubes 7, 8, and 12 of the rear frame, is acceptable for installation. However, if a frame is installed in accordance with this paragraph, it must be NDT-inspected within 9 months after the installation, in accordance with Part 3 of the Accomplishment Instructions of Fokker Service Bulletin SBF50-71-049, dated October 25, 2005.
(iii) Any frame inspected in accordance with Fokker Component Service Bulletin F8200-035-71-10, and found to have any deviation greater than 3.0 mm but less than or equal to 3.5 mm on any tube, except tubes 7, 8, and 12 of the rear frame, is acceptable for installation. However, if a frame is installed in accordance with this paragraph, it must be NDT-inspected within 6 months after the installation, in accordance with Part 3 of the Accomplishment Instructions of Fokker Service Bulletin SBF50-71-049, dated October 25, 2005.
(iv) Any frame inspected in accordance with Fokker Component Service Bulletin F8200-035-71-10, and found to have any deviation greater than 3.5 mm but less than or equal to 5.0 mm on any tube, except tubes 7, 8, and 12 of the rear frame, is acceptable for installation. However, if a frame is installed in accordance with this paragraph, it must be NDT-inspected within 3 months after the installation, in accordance with Part 3 of the Accomplishment Instructions of Fokker Service Bulletin SBF50-71-049, dated October 25, 2005.
(v) Any tube 7, 8, or 12 of the rear frame, inspected in accordance with Fokker Component Service Bulletin F8200-035-71-10, and found to have any deviation greater than 2.0 mm but less than or equal to 5.0 mm, is acceptable for installation. However, if a frame is installed in accordance with this paragraph, it must be NDT-inspected within 3 months after the installation, in accordance with Part 3 of the Accomplishment Instructions of Fokker Service Bulletin SBF50-71-049, dated October 25, 2005.
Note: This AD differs from the MCAI and/or service information as follows: No differences.
