AD 2001-14-01 Airworthiness Directives; Boeing Model 757-200 Series Airplanes Modified by Supplemental Type Certificate SA1727GL

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

Model 757-200 series airplanes modified by Supplemental Type Certificate (STC) SA1727GL, certificated in any category. Note 1: This AD applies to each airplane identified in the preceding applicability provision, regardless of whether it has been otherwise 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 the inability of the flight crew to remove power from the telephone system when necessary, accomplish the following: Deactivation (a) Within 18 months after the effective date of this AD, deactivate the In-Flight Phone Corporation air-to-ground telephone system approved by STC SA1727GL. Accomplish the deactivation in accordance with the procedures in paragraphs (a)(1), (a)(2), (a)(3), (a)(4), and (a)(5) of this AD. (1) Remove the circuit breakers listed in the following table:   Number Label Location CB9012 ATG Phone Bus P11-2 Overhead Cockpit. CB9013 CSU P37 Right Miscellaneous Electrical Equipment Panel. CB9014 RFU P37 Right Miscellaneous Electrical Equipment Panel. C340 C340 P70 Miscellaneous Electrical Equipment Panel. C341 C341 P70 Miscellaneous Electrical Equipment Panel. (2) Remove wire between circuit breaker C340 and C334 bus connection in P70 Miscellaneous Electrical Equipment Panel. (3) Remove wire between circuit breaker C340 and C1292 bus connection in P70 Miscellaneous Electrical Equipment Panel. (4) Remove wire between circuit breaker CB9012 and C560 in P11-2 Overhead Cockpit panel. (5) Cap and stow any remaining wires associated with the circuit breakers listed in the table above. Spares (b) As of the effective date of this AD, no person shall install an air-to-ground telephone system in accordance with STC SA1727GL, on any airplane. Alternative Methods of Compliance (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, Chicago Aircraft Certification Office (ACO), FAA. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Chicago ACO. Note 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Chicago ACO. Special Flight Permits (d) Special flight permits may be issued in accordance with §§ 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. Effective Date (e) This amendment becomes effective on August 15, 2001. Issued in Renton, Washington on June 29, 2001. Vi L. Lipski, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 01-17155 Filed 7-10-01; 8:45 am] BILLING CODE 4910-13-P