AD 93-13-05

93-13-05 DASSAULT AVIATION: Amendment 39-8618. Docket 92-NM-167-AD. Applicability: All Model Mystere-Falcon 900 series airplanes, certificated in any category.

Compliance: Required as indicated, unless accomplished previously.

To prevent interference with the operation of the engine controls and the flight controls, accomplish the following:

(a) Within 50 hours time-in-service or 30 days after the effective date of this AD, whichever occurs first, accomplish paragraph (a)(1) or (a)(2) of this AD, as applicable.

(1) For airplanes equipped with a Falcon Jet Corporation type interior (a water system pressure accumulator is installed on the left-hand side of frame 25): Perform a complete inspection of the water system in accordance with paragraph 13 of the Supplemental Maintenance Manual, Temporary Revision, dated February 1992; and install a placard, part number FGFB 825 003 760, in a visible location in the aft toilet compartment.

(2) For airplanes equipped with a Dassault Aviation type interior (no water system pressure accumulator is installed at frame 25): Accomplish paragraphs (a)(2)(i), (a)(2)(ii), and (a)(2)(iii) of this AD.

(i) Perform a complete inspection of the water system, in accordance with procedure 38-102 of the Maintenance Manual.

(ii) Reinforce the sealing of the collector under the washbasin, in accordance with Dassault Aviation Service Bulletin F900-113 (F900-38-4), dated March 25, 1992.

(iii) Perform an inspection of heating element 43 HR of pipe item 320, Illustrated Parts Catalog (IPC) 38-30-20, figure 10, in accordance with procedure 30-701 of the Maintenance Manual; and, if a discrepancy is found, replace the heating element within 50 hours time-in- service after performing the inspection required by this paragraph.

(b) Prior to each flight of more than 4 hours time-in-service that occurs after accomplishing the requirements of paragraph (a) of this AD, accomplish the following, as applicable: Inspect the water system, in accordance with the paragraph entitled "Maintenance of Pressurized Central Water System" (page 19), of Revision 4 of the Supplemental Maintenance Manual (for Model Mystere-Falcon 900 series airplanes equipped with a Falcon Jet Corporation type interior); or in accordance with procedure 05-100 (temporary revision No. 59) of the Maintenance Manual (for Model Mystere-Falcon 900 series airplanes equipped with a Dassault Aviation type interior).

(c) Within the next 300 hours time-in-service or 6 months after the effective date of this AD, whichever occurs first, repeat the inspection required by paragraph (a)(1) or (a)(2)(i) of this AD, as applicable. Thereafter, repeat the applicable inspection at intervals not to exceed 300 hours time-in-service or 6 months after the immediately preceding inspection, whichever occurs first.

(d) Within 2 years after the effective date of this AD, modify the underfloor heating at frame 25, in accordancewith Dassault Aviation Service Bulletin F900-115 (F900-30-9), dated May 6, 1992, or Revision 1, dated February 25, 1993.

(e) Accomplishment of modification of the underfloor heating in accordance with Dassault Aviation Service Bulletin F900-115 (F900-30-9), dated May 6, 1992, or Revision 1, dated February 25, 1993, constitutes terminating action for the inspections required by paragraphs (a), (b), and (c) of this AD.

(f) 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.

(g) 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.

(h) The reinforcement shall be done in accordance with Dassault Aviation Service Bulletin F900-113 (F900-38-4), dated March 25, 1992. The modification shall be done in accordance with Dassault Aviation Service Bulletin F900-115 (F900-30-9), dated May 6, 1992; or Dassault Aviation Service Bulletin F900-115 (F900-30-9), Revision 1, dated February 25, 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 Falcon Jet Corporation, Customer Support Department, Teterboro Airport, Teterboro, New Jersey 07608. 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 NorthCapitol Street, NW., suite 700, Washington, DC.

(i) This amendment becomes effective on August 18, 1993.