AD 95-19-18

95-19-18 TWIN COMMANDER AIRCRAFT CORPORATION: Amendment 39-9379; Docket No. 95-CE-20-AD.

Applicability: The following airplane models and serial numbers, certificated in any category.

Models Serial Numbers 680T and 680V 1473 through 1720 680W 1721 through 1850 681 6001 through 6072 690 11001 through 11079 690A 11100 through 11344 690B 11350 through 11566 690C 11600 through 11735 690D 15001 through 15042 695 95000 through 95084 695A 96000 through 96100 695B 96201 through 96208

NOTE 1: This AD applies to each airplane identified in the preceding applicability revision, 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 (c) of this AD. The request should includean 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 within the next 50 hours time-in-service after the effective date of this AD, unless already accomplished.

To prevent structural damage to the airplane caused by excessive turbulence, which could result in loss of the airplane, accomplish the following:

(a) Install the placard (to the windshield centerpost) and incorporate the airplane flight manual/pilot operating handbook (AFM/POH) revisions that are included with the kits presented below. The placard and AFM/POH revisions provide warnings to the airplane operator of the importance of observing the Turbulent Air Penetration and Maneuvering speeds:

Kit No. Model Affected SB220-1 680T SB220-2 680V SB220-3 680W SB220-4 681 SB220-5 690 SB220-6 690A SB220-7 690B SB220-8 690C SB220-9 690D SB220-10 695 SB220-11 695A SB220-12 695B

NOTE 2: Twin Commander Service Bulletin No. 220, dated February 1, 1995, relates to the subject of this AD, and references the SB220 service kits specified above.

(b) Special flight permits may be issued in accordance with sections 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.

(c) An alternative method of compliance or adjustment of the compliance time that provides an equivalent level of safety may be approved by the Manager, Seattle Aircraft Certification Office (ACO), FAA, Northwest Mountain Region, 1601 Lind Avenue S.W., Renton, Washington 98055-4056. The request shall be forwarded through an appropriate FAA Maintenance Inspector, who may add comments and then send it to the Manager, Seattle ACO.

NOTE 3: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Seattle ACO.

(d) All persons affected by this directive may obtain copies of the kits referenced above that include the placard and the AFM revisions upon request to the Twin Commander Aircraft Corporation, 19010 59th Drive, NE., Arlington, Washington 98223; or may examine this document at the FAA, Central Region, Office of the Assistant Chief Counsel, Room 1558, 601 E. 12th Street, Kansas City, Missouri 64106.

(e) This amendment becomes effective on October 25, 1995.