AD 98-18-15 Airworthiness Directives; Gulfstream Model G-V Series Airplanes

Models named: G-V series. Read the applicability below — it usually turns on serial or part numbers too.

Model G-V series airplanes, serial numbers 501 through 549 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 (c) 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 as indicated, unless accomplished previously. To prevent chafing of a wiring harness against the crew oxygen bottle, which could result in electrical shorting and possible fire in the underfloor structure of the airplane, accomplish the following: (a) Within 25 flight hours after the effective date of this AD, perform a one-time visual inspection to measure the clearance between the wiring harness located beneath floor board 4C and the crew oxygen bottle and bottle mounting structure, in accordance with Gulfstream Aerospace G-V Alert Customer Bulletin No. 4A, dated July 8, 1998, as revised by Gulfstream Aerospace G-V Alert Customer Bulletin No. 4A, Amendment 1, dated August 10, 1998. (1) If the clearance is greater than or equal to .250 inch, and if any Teflon sheeting is installed: No further action is required by paragraph (a) of this AD. (2) If the clearance is greater than or equal to .250 inch, and if no Teflon sheeting is installed: Prior to further flight, install .030-inch Teflon sheeting in accordance with the alert customer bulletin, as revised by Amendment 1. (3) If the clearance is less than .250 inch, and if any Teflon sheeting is installed: Prior to further flight, inspect the sheeting for evidence of chafing, in accordance with the alert customer bulletin, as revised by Amendment 1. (i) If no evidence of chafing of the Teflon sheeting is detected, prior to further flight, install .125-inch Teflon sheeting, in accordance with the alert customer bulletin, as revised by Amendment 1. (ii) If any evidence of chafing of the Teflon sheeting is detected, prior to further flight, remove the Teflon sheeting and inspect the wires to detect evidence of chafing, in accordance with the alert customer bulletin, as revised by Amendment 1; and accomplish the actions specified in either paragraph (a)(4)(i) or (a)(4)(ii), as applicable. (4) If the clearance is less than .250 inch, and if no Teflon sheeting is installed: Prior to further flight, inspect the wires to detect evidence of chafing, in accordance with the alert customer bulletin, as revised by Amendment 1. (i) If no evidence of chafing of the wires is detected, prior to further flight, install .125-inch Teflon sheeting in accordance with the alert customer bulletin, as revised by Amendment 1. (ii) If any evidence of chafing of the wires is detected, prior to further flight, repair in accordance with a method approved by the Manager, Atlanta Aircraft Certification Office (ACO), FAA, Small Airplane Directorate. (b) Within 150 flight hours after the effective date of this AD, relocate the crew oxygen bottle and rework the lines and tubing associated with the crew and passenger oxygen bottles, in accordance with Gulfstream Aerospace G-V Alert Customer Bulletin No. 4A, dated July 8, 1998, as revised by Gulfstream Aerospace G-V Alert Customer Bulletin No. 4A, Amendment 1, dated August 10, 1998. Note 2: Gulfstream Aerospace G-V Alert Customer Bulletin No. 4A, dated July 8, 1998, as revised by Gulfstream Aerospace G-V Alert Customer Bulletin No. 4A, Amendment 1, dated August 10, 1998, refers to Gulfstream [[Page 46872]] Aerospace Aircraft Service Change No. 059A, dated August 3, 1998, as an additional source of service information for accomplishing the relocation of the crew oxygen bottle. (c) 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, Atlanta ACO. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Atlanta ACO. Note 3: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Atlanta ACO. (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) Except as provided by (a)(4)(ii) of this AD, the actions shall be done in accordance with Gulfstream Aerospace G-V Alert Customer Bulletin No. 4A, dated July 8, 1998, as revised by Gulfstream Aerospace G-V Alert Customer Bulletin No. 4A, Amendment 1, dated August 10, 1998. 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 Gulfstream Aerospace Corporation, P.O. Box 2206, M/S D-10, Savannah, Georgia 31402-9980. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the FAA, Small Airplane Directorate, Atlanta Aircraft Certification Office, One Crown Center, 1895 Phoenix Boulevard, suite 450, Atlanta, Georgia; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. (f) This amendment becomes effective on September 18, 1998. Issued in Renton, Washington, on August 26, 1998. Vi L. Lipski, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 98-23601 Filed 9-2-98; 8:45 am] BILLING CODE 4910-13-U