94-19-06: Crew Oxygen Masks

94-19-06 PURITAN BENNETT AERO SYSTEMS: Amendment 39-9028. Docket 94-NM-154-AD. Applicability: Sweep-On Model 2000 crew oxygen masks, as listed in Puritan Bennett Service Bulletin 174250-35-1, dated August 1994; as installed on, but not limited to, Dornier Model 228 and 328 series airplanes, Cessna Model 550 and 650 and Citation Model I and II series airplanes, Raytheon Corporate Jets Model HS 125-700A series airplanes, Dassault Mystere Falcon Model 20 series airplanes, Beech Model 400 (Beechjet) series airplanes, and Gulfstream Model G-1159 (G-II) and G-1159A (G-III) series airplanes; certificated in any category. Compliance: Required as indicated, unless accomplished previously. To prevent the flight crew from experiencing difficulty in exhaling into the affected crew oxygen masks, accomplish the following: (a) Within 60 days after the effective date of this AD, modify the crew oxygen masks, in accordance with Puritan Bennett Service Bulletin 174250-35-1, dated August 1994. (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, Los Angeles Aircraft Certification Office (ACO), FAA, Transport 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, Los Angeles ACO. NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Los Angeles 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 modification shall be done in accordance with Puritan Bennett Service Bulletin 174250-35-1, dated August 1994. 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 Puritan Bennett Company, 108000 Pflumm Road, Lenexa, Kansas 66215. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the FAA, Transport Airplane Directorate, Los Angeles Aircraft Certification Office, 3229 East Spring Street, Long Beach, California; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. (e) This amendment becomes effective on October 6, 1994.