Airworthiness directives › 99-19-32
AD 99-19-32 Airworthiness Directives; Pilatus Aircraft Ltd. Models PC-12 and PC-12/45 Airplanes
Makes named: pilatus. Models named: PC-12, PC-12/45. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
Models PC-12 and PC-12/45 airplanes, manufacturer serial numbers (MSN) 101 through MSN 236; certificated in any category, that have one of the following flight control flap actuators installed: --Pilatus part number (P/N) 978.71.20.302--Actuator, Linear (951D100-5); --Pilatus P/N 978.71.20.303--Actuator, Linear (951D100-7); and --Pilatus P/N 978.71.20.304--Actuator, Linear (951D100-9). Note 1: This AD applies to each airplane identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For airplanes that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (d) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it.
Compliance
Required as indicated in the body of this AD, unless already accomplished. To prevent premature wear of the internal gear system caused by excessive backlash in the flight control flap actuators, which could eventually result in loss of actuator output with possible reduced or loss of airplane control, accomplish the following: (a) Within the next 50 hours time-in-service (TIS) after the effective date of this AD, inspect all flap actuator internal gear systems to assure that correct end-play and backlash measurements exist, in accordance with the ACCOMPLISHMENT INSTRUCTIONS section of Pilatus Service Bulletin No. 27-005, dated November 18, 1998. Prior to further flight, perform any corrective adjustments, as necessary, in accordance with the maintenance manual. (b) As of the effective date of this AD, no person may install, on any affected airplane, a flap actuator that has not been inspected and adjusted (as necessary) as required by paragraph (a) this AD. Note 2: The FAA recommends that the most up-to-date Pilatus reports and revisions pertaining to this subject be incorporated into the Pilatus PC-12 Maintenance Manual. The most up-to-date documents at the date of issuance of this AD are Temporary Revision No. 27-04, dated November 18, 1998; and Temporary Revision No. 04- 04, dated June 16, 1999. (c) Special flight permits may be issued in accordance with Secs. 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the airplane to a location where the requirements of this AD can be accomplished. (d) An alternative method of compliance or adjustment of the compliance times that provides an equivalent level of safety may be approved by the Manager, Small Airplane Directorate, 1201 Walnut, suite 900, Kansas City, Missouri 64106. The request shall be forwarded through an appropriate FAA Maintenance Inspector, who may add comments and then send it to the Manager, Small Airplane Directorate. Note 3: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Small Airplane Directorate. (e) Questions or technical information related to Pilatus Service Bulletin No. 27-005, dated November 18, 1998, should be directed to Pilatus Aircraft Ltd., Customer Liaison Manager, CH-6371 Stans, Switzerland; telephone: +41 41 619 63 19; facsimile: +41 41 610 33 51. This service information may be examined at the FAA, Central Region, Office of the Regional Counsel, Room 1558, 601 E. 12th Street, Kansas City, Missouri 64106. (f) The inspections required by this AD shall be done in accordance with Pilatus Service Bulletin No. 27-005, dated November 18, 1998. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from Pilatus Aircraft Ltd., Customer Liaison Manager, CH-6371 Stans, Switzerland. Copies may be inspected at the FAA, Central Region, Office of the Regional Counsel, Room 1558, 601 E. 12th Street, Kansas City, Missouri, or at the Office of the Federal Register, 800 North Capitol Street, NW, suite 700, Washington, DC. Note 4: The subject of this AD is addressed in Swiss AD HB 98- 460, dated November 23, 1998. (g) This amendment becomes effective on November 8, 1999. Issued in Kansas City, Missouri, on September 9, 1999. Michael K. Dahl, Acting Manager, Small Airplane Directorate, Aircraft Certification Service. [FR Doc. 99-24088 Filed 9-16-99; 8:45 am] BILLING CODE 4910-13-P
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1