AD 98-09-12 Airworthiness Directives; Raytheon Aircraft Company Model 1900D Airplanes

Makes named: raytheon. Models named: 1900D. Read the applicability below — it usually turns on serial or part numbers too.

Model 1900D airplanes, serial numbers UE-1 through UE-160, 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 (e) 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.

Required within the next 1,000 hours time-in-service (TIS) or within the next 180 days after the effective date of this AD, whichever occurs first, unless already accomplished. To prevent the loss of the pilot and co-pilot intercom, VHF communications, and passenger address system, which could result in loss of all communication during critical phases of flight, accomplish the following: (a) Inspect the electrical connectors, the radio switching panel, and its relay printed circuit boards (PCB's) for moisture and corrosion in accordance with the Accomplishment Instructions in Raytheon Service Bulletin (SB) No. 2643, dated August, 1996. (1) If moisture is found, prior to further flight, clean and dry the component in accordance with the Accomplishment Instructions in Raytheon SB No. 2643, dated August, 1996. (2) If corrosion is found, prior to further flight, either clean or replace the component, as defined in and in accordance with the Accomplishment Instructions in Raytheon SB No. 2643, dated August, 1996. (3) If moisture or corrosion is found, prior to further flight, locate and eliminate the source (i.e., crack, hole, leak) in accordance with the Accomplishment Instructions in Raytheon SB No. 2643, dated August, 1996. (b) Inspect the nose avionics wire harnesses for proper installation, and if any wire harness is not installed properly, prior to further flight, secure it with cable ties in accordance with the Accomplishment Instructions in Raytheon SB No. 2643, dated August, 1996. (c) Remove the A017 component PCB, part number (P/N) 101-342536- 1, and replace the PCB with a new A017 component PCB (P/N 101- 342536-5 or an FAA-approved equivalent part number) in accordance with the Accomplishment Instructions in Raytheon SB No. 2643, dated August, 1996. (d) 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. (e) An alternative method of compliance or adjustment of the compliance time that provides an equivalent level of safety may be approved by the Manager, Wichita Aircraft Certification Office (ACO), Room 100, 1801 Airport Rd., Wichita, Kansas 67209. The request shall be forwarded through an appropriate FAA Maintenance Inspector, who may add comments and then send it to the Manager, Wichita ACO. Note 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Wichita ACO. (f) The inspections, modifications, and replacements required by this AD shall be done in accordance with Raytheon Aircraft Mandatory Service Bulletin 1900D No. 2643, dated August, 1996. 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 Raytheon Aircraft Company, P. O. Box 85, Wichita, Kansas 67201-0085. 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. (g) This amendment becomes effective on June 12, 1998. Issued in Kansas City, Missouri, on April 20, 1998. Marvin R. Nuss, Acting Manager, Small Airplane Directorate, Aircraft Certification Service. [FR Doc. 98-11014 Filed 4-27-98; 8:45 am] BILLING CODE 4910-13-U