99-21-26: Airplane Flight Manual Changes - Icing Conditions

99-21-26 RAYTHEON AIRCRAFT COMPANY (Formerly Beech): Amendment 39-11372. Docket 96-NM-209-AD. Supersedes AD 94-25-10, Amendment 39-9094. \n\n\tApplicability: All Model 400, 400T, and MU-300-10 airplanes; and Model 400A airplanes having serial numbers RK-1 through RK-107 inclusive; certificated in any category. \n\n\tNOTE 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 (c) 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. \n\n\tCompliance: Required as indicated, unless accomplished previously. \n\n\tTo prevent uncommanded nose-down pitch at certain flap settings during icing conditions, accomplish the following: \n\n\t(a)\tWithin 20 days after December 28, 1994 (the effective date of AD 94-25-10, amendment 39-9094), revise the Limitations Section and Normal Procedures Section of the FAA-approved Airplane Flight Manual (AFM) to include the following text. This may be accomplished by inserting a copy of this AD in the AFM. \n\n"ICING CONDITIONS \n\nIf icing conditions are encountered during flight, no greater than 10 degrees flaps may be utilized for landing unless the following conditions are met: \n\n1. The icing conditions were encountered for less than 10 minutes, and the Ram Air Temperature (RAT) during such encounter was warmer than -8 degrees C. \n\nOr \n\n2. A RAT of +5 degrees C or warmer is observed during approach and landing. \n\nIf eitherof the above two conditions is met, 30 degrees flaps may be utilized for landing. Otherwise: \n\nFlaps (landing flaps setting).....................................10 degrees \nLand Select (LAND SEL) Switch ...........................Flaps 10 degrees \n\nUse landing data for 10 degrees flaps from Appendix 1 of this AD." \n\n\t(b)\tWithin 2 years after the effective date of this AD, accomplish the actions specified in paragraph (b)(1) or (b)(2) of this AD, as applicable. \n\n\t\t(1)\tFor Model 400, 400A, and MU-300-10 airplanes: Modify the airplane ice protection system in accordance with Beechcraft Service Bulletin No. 2600, dated November 1995. Accomplishment of this modification constitutes terminating action for the AFM revision required by paragraph (a) of this AD. Following such accomplishment, that AFM revision may be removed from the AFM. \n\n\t\t(2)\tFor Model 400T airplanes: Accomplish the actions specified in accordance with either paragraph (b)(2)(i) or (b)(2)(ii) of this AD.(i)\tAccomplish the actions specified in paragraph (b)(2)(i)(A) and (b)(2)(i)(B) of this AD. \n\n\t\t\t\t(A)\tRevise the Limitations Section and Normal Procedures Section of the FAA-approved Airplane Flight Manual (AFM) to include the following text. This may be accomplished by inserting a copy of this AD in the AFM. Following such accomplishment, the AFM revision required by paragraph (a) of this AD may be removed from the AFM. \n\n"ICING CONDITIONS \n\nIf icing conditions are encountered during flight, no greater than 10 degrees flaps may be utilized for landing unless the following conditions are met: \n\n1. The icing conditions were encountered for less than 10 minutes, and the Ram Air Temperature (RAT) during such encounter was warmer than -8 degrees C. \n\nOr \n\n2. A RAT of +5 degrees C or warmer is observed during approach and landing. \n\nIf either of the above two conditions is met, 30 degrees flaps may be utilized for landing. \n\nNOTE: Do not operate anti-ice system atram air temperatures greater than 50 degrees F (10 degrees C) unless in actual icing conditions, as indicated by the illumination of the ICING annunciator or airframe ice accumulation." \n\n\t\t\t\t(B)\tModify the airplane ice protection system in accordance with Raytheon Beech Service Instructions No. T-1A-0064 (undated). Accomplishment of the modification does not constitute terminating action for the requirement to revise the AFM in accordance with paragraph (b)(2)(i)(A) of this AD. \n\n\t\t\t(ii)\tModify the airplane ice protection system in accordance with a method approved by the Manager, Wichita Aircraft Certification Office (ACO), FAA, Small Airplane Directorate. \n\nAlternative Methods of Compliance \n\t(c)\tAn alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Wichita ACO. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Wichita ACO. \n\n\tNOTE 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Wichita ACO. \n\nSpecial Flight Permits \n\t(d)\tSpecial 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. \n\nIncorporation by Reference \n\t(e)\tExcept as provided by paragraphs (a), (b)(2)(i)(A), and (b)(2)(ii) of this AD, the actions shall be done in accordance with Beechcraft Service Bulletin No. 2600, dated November 1995, or Raytheon Service Instructions No. T-1A-0064 (undated). 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 inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the FAA, Small Airplane Directorate, Wichita Aircraft Certification Office, 1801 Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. \n\n\t(f)\tThis amendment becomes effective on November 22, 1999. \n\nAPPENDIX 1