Airworthiness directives › 98-06-28
AD 98-06-28 Airworthiness Directives; Learjet Model 31 and 35A Airplanes
Models named: 31, 35A. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
Model 31 airplanes having serial numbers 31-002 through 31-029 inclusive, and Model 35A airplanes having serial numbers 35-647 through 35-670 inclusive; certificated in any category. 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 (b) 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, unless accomplished previously. To prevent electrical arcing and consequent fire hazard, accomplish the following: (a) Within 6 months after the effective date of this AD, replace two segments of 16 American Wire Gauge (AWG) wire with 8 AWG wire at the P190 connector that is connected to the E33 auxiliary cabin heater relay box, in accordance with Learjet Service Bulletin SB 31- 21-10, Revision 1, dated May 17, 1996 (for Model 31 airplanes), or Learjet Service Bulletin SB 35-21-24, Revision 1, dated May 17, 1996 (for Model 35A airplanes), as applicable. Note 2: Accomplishment of the replacement in accordance with the procedures specified in Learjet Service Bulletin SB 31-21-10 or SB 35-21-24 (original issue), both dated August 11, 1995, but using equipment that is identical or equivalent to that of the applicable kit specified in Revision 1 of those service bulletins, is considered to be acceptable for compliance with the requirements of paragraph (a) of this AD. (b) An 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 Aircraft Certification Office (ACO), FAA, Small Airplane Directorate. 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. Note 3: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Wichita ACO. (c) 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. (d) The actions shall be done in accordance with Learjet Service Bulletin SB 31-21-10, dated August 11, 1995, or Revision 1, dated May 17, 1996, or Learjet Service Bulletin SB 35-21-24, dated August 11, 1995, or Revision 1, dated May 17, 1996; as applicable. (1) The incorporation by reference of Learjet Service Bulletin SB 31-21-10, Revision 1, dated May 17, 1996, and Learjet Service Bulletin SB 35-21-24, Revision 1, dated May 17, 1996, is approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. (2) The incorporation by reference of Learjet Service Bulletins SB 31-21-10 dated August 11, 1995 and Learjet SB 35-21-24 dated August 11, 1995, was approved previously by the Director of the Federal Register as of June 28, 1996 (61 FR 26090, May 24, 1996). (3) Copies may be obtained from Learjet, Inc., One Learjet Way, Wichita, Kansas 67209-2942. 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. (e) This amendment becomes effective on April 24, 1998. [[Page 13500]] Issued in Renton, Washington, on March 11, 1998. Darrell M. Pederson, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 98-6950 Filed 3-19-98; 8:45 am] BILLING CODE 4910-13-U
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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