Airworthiness Directive · Amendment 39-16333 · Landing gear
Fokker Services B.V. Model F.27 Mark 500 and 600 Airplanes
This AD applies to Fokker Services B.V. Model F.27 Mark 500 and 600 airplanes; certified in any category; having serial numbers (S/Ns) 10452, 10525,10530, 10531, 10550, 10557, 10559, 10566, 10569, 10589, 10603, 10605, 10606, 10613, 10615, 10623 through 10631 inclusive, 10633, 10637, 10639, 10641, 10642, 10669, and 10672.
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:
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 500 flight cycles after the effective date of this AD, measure the length of the extended portion of the sliding member of the main landing gear (MLG), in accordance with Part 1 of the Accomplishment Instructions of Fokker Service Bulletin F27/32-172, dated January 26, 2009. Repeat the measurement at intervals not to exceed 500 flight cycles until lockwiring is installed in accordance with Fokker Service Bulletin F27/32-172, dated January 26, 2009, or the requirements of paragraph (h) of this AD have been completed.
(h) At the applicable time specified in paragraph (h)(1) or (h)(2) of this AD, perform a general visual inspection for the presence of lockwiring and damage to lockwiring on the two sliding member end stop lock bolts of the MLG, in accordance with Part 2 of the Accomplishment Instructions of Fokker Service Bulletin F27/32-172, dated January 26, 2009. If lockwiring is missing or damaged, install lockwiring before further flight, in accordance with Fokker Service Bulletin F27/32-172, dated January 26, 2009.
(1) If, during any measurement required by paragraph (g) of this AD, overextension is found, or the measurement has increased by 1.0 millimeter (mm) or more compared to the previous measurement, inspect before further flight.
(2) If during any measurement required by paragraph (g) of this AD, no overextension is found and the measurement has not increased by 1.0 mm or more compared to the previous measurement, inspect within 4,000 flight hours after the effective date of this AD.
Note 1: Fokker Service Bulletin F27/32-172, dated January 26, 2009, refers to Messier-Dowty Service Bulletin 32-91W, dated September 8, 2008, as an additional source of guidance.
(i) If, during any measurement required by paragraph (g) of this AD, overextension is found or the measurement has increased by 1.0 mm or more compared to the previous measurement; or if, during any inspection required by paragraph (h) of this AD, lockwiring is not present or is not installed correctly; submit a report to Fokker Services B.V., Technical Services Dept., P.O. Box 231, 2150 AE Nieuw-Vennep, the Netherlands; telephone +31 (0)252-627-350; fax +31 (0)252-627-211; e-mail technicalservices.fokkerservices@stork.com; Internet http://www.myfokkerfleet.com; at the applicable time specified in paragraph (i)(1) or (i)(2) of this AD. The report must include any finding of overextension or incorrect or missing lockwiring.
(1) If the inspection or measurement was done on or after the effective date of this AD: Submit the report within 30 days after the inspection or measurement was accomplished, as applicable.
(2) If the inspection or measurement was accomplished prior to the effective date of this AD: Submit the report within 30 days after the effective date of this AD.
(j) If lockwiring is installed in accordance with paragraph (h) of this AD, or if no discrepancies are found during the inspection required by paragraph (h) of this AD, as applicable, the repetitive measurement required by paragraph (g) of this AD is no longer required by this AD.
(k) As of the effective date of this AD: No person may install a MLG on any airplane unless Part 2 of Fokker Service Bulletin F27/32-172, dated January 26, 2009, has been accomplished for that part.
Note 2: This AD differs from the MCAI and/or service information as follows: No differences.
