AD 98-18-14 Airworthiness Directives; Boeing Model 757-200 Series Airplanes

Models named: 757-200 series. Read the applicability below — it usually turns on serial or part numbers too.

Model 757-200 series airplanes, certificated in any category; excluding the following line numbers: 2 75 221 127 130 162 180 209 212 219 388 526 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 (b) 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 failure of essential electrical systems and a potential fire hazard for passengers and crewmembers due to damage or chafing of electrical wire bundles, accomplish the following: (a) Within 90 days after the effective date of this AD, perform a one-time detailed visual inspection to detect damage or chafing of the electrical wire bundles having part numbers W2016-0001-12 and W2016-0002-16, and adjacent wiring; and to verify adequate clearance exists between the wire bundles and adjacent disconnect bracket. Pay particular attention to the area located on the looms behind the P11 panel near the AP0011 disconnect bracket. (1) If no damage or chafing is detected, and adequate clearance exists, no further action is required by this AD. (2) If damage or chafing is detected, and adequate clearance exists, prior to further flight, repair the wire bundles in accordance with Section 20-10-13 of the Boeing Standard Wiring Practices Manual. (3) If no damage or chafing is detected and inadequate clearance exists, prior to further flight, modify the wire bundles to achieve adequate clearance, in accordance with Section 20-10-11 and 20-10-12 of the Boeing Standard Wiring Practices Manual. (4) If damage or chafing is detected and inadequate clearance exists, prior to further flight, repair the wire bundles in accordance with Section 20-10-13 of the Boeing Standard Wiring Practices Manual; and modify the wire bundles in accordance with Section 20-10-11 and 20-10-12 of the Boeing Standard Wiring Practices Manual. (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, Seattle 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, Seattle ACO. Note 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Seattle 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) This amendment becomes effective on September 17, 1998. Issued in Renton, Washington, on August 27, 1998. Vi L. Lipski, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 98-23620 Filed 9-1-98; 8:45 am] BILLING CODE 4910-13-U