AD 93-24-01 ACTIVE

93-24-01 CORPORATE JETS LIMITED (FORMERLY BRITISH AEROSPACE): Amendment 39-8750. Docket 93-NM-70-AD.

Applicability: Model BAe 125-1000A series airplanes, having serial numbers 258151, 258159, and 259003 through 259027 inclusive; certificated in any category.

Compliance: Required as indicated, unless accomplished previously.

To prevent chafing or other damage of the passenger oxygen pipe and a potential fire and/or loss of emergency oxygen for the passengers, accomplish the following:

(a) Within 30 days after the effective date of this AD, perform a visual inspection to detect chafing or other damage of the oxygen pipe located next to the nose wheel steering control chain within the left-hand cockpit console and to ensure that a minimum of 0.25 inch clearance exists between the oxygen pipe and the nose wheel steering control chain, in accordance with Corporate Jets Limited Service Bulletin S.B. 35-36, dated January 7, 1993.

(1) If clearance of 0.25 inchor greater exists, accomplish the requirements of paragraph (a)(1)(i) or (a)(1)(ii) of this AD.

(i) If no chafing or other damage is detected: No further action is required by this AD.

(ii) If any chafing or other damage is detected: Prior to further flight, replace the currently-installed oxygen pipe with a new oxygen pipe, ensure that a minimum clearance of 0.25 inch or greater exists, and repeat the visual inspection in accordance with the service bulletin.

(2) If clearance of less than 0.25 inch exists, accomplish the requirements of paragraph (a)(2)(i) or (a)(2)(ii) of this AD.

(i) If no chafing or other damage is detected: Within 30 days after accomplishing the visual inspection, reposition the oxygen pipe to obtain minimum clearance of at least 0.25 inch and maximum ovality not to exceed 0.03 inch, in accordance with the service bulletin; and if a minimum clearance of 0.25 inch cannot be achieved utilizing the methods described in the service bulletin, reposition in accordance with a method approved by the Manager, Standardization Branch, ANM-113, FAA, Transport Airplane Directorate.

(ii) If any chafing or other damage is detected: Prior to further flight, replace the currently-installed oxygen pipe with a new oxygen pipe, ensure that minimum clearance of 0.25 inch or greater exists, and repeat the visual inspection in accordance with the service bulletin.

(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, Standardization Branch, ANM-113, 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, Standardization Branch, ANM-113.

NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Standardization Branch, ANM-113.

(c) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the airplane to a location where the requirements of this AD can be accomplished.

(d) The inspections, repositioning, and replacement shall be done in accordance with Corporate Jets Limited Service Bulletin S.B. 35-36, dated January 7, 1993. 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 Corporate Jets, Inc., 22070 Broderick Drive, Sterling, Virginia 20166. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC.

(e) This amendment becomes effective on January 20, 1994.