Airworthiness directives › 2000-25-51
AD 2000-25-51 Airworthiness Directives; Rolls-Royce Deutschland GmbH (Formerly BMW Rolls-Royce GmbH) Model BR700-715A1-30, BR700-715B1-30, and BR700-715C1-30 Turbofan Engines
Applicability*9
This airworthiness directive (AD) is applicable to certain Rolls-Royce Deutschland GmbH (formerly BMW Rolls-Royce GmbH) model BR700-715A1-30, BR700-715B1-30, and BR700-715C1-30 turbofan engines that are listed by serial number in Table 1 and Table 2 of this AD, and that have a high pressure turbine (HPT) stage 1 disk, part number (P/N) BRH20009, BRH20010, BRH12167, BRH12168, BRH12466, or BRH12467 with a SN that is listed in Table 1; or a stage 2 disk, P/N's BRH19349 or BRH19350 with a SN that is listed in Table 2. These engines are installed on but not limited to McDonnell Douglas Corporation 717 airplanes. Note 1: This AD applies to each engine 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 engines 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 (d) 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. Compliance Compliance with this AD is required as indicated, unless already done. To prevent an uncontained failure of the HPT stage 1 or stage 2 disk due to exceeded life-cycle limits, do the following: (a) Remove HPT stage 1 disks listed in Table 1 before exceeding the cycles-since-new (CSN) in the “Replace By” column, and replace with serviceable disks. Table 1.—HPT Stage 1 Disks By Engine SN, Disk P/N, and Disk SN Engine Serial No. Disk P/N Disk SN Replace by 13111 BRH12466 312 2600 CSN 13112 BRH12466 308 2600 CSN 13113 BRH12167 130 2600 CSN 13118 BRH12467 330 2600 CSN 13119 BRH12467 319 2600 CSN 13120 BRH12467 331 2600 CSN 13139 BRH12168 154 2600 CSN 13174 BRH20010 380 2600 CSN 13175 BRH20010 381 2600 CSN 13176 BRH20010 378 2600 CSN 13178 BRH20009 221 2600 CSN 13179 BRH20009 211 2600 CSN 13180 BRH20009 228 2600 CSN 13182 BRH20009 204 2600 CSN 13183 BRH20009 205 2600 CSN 13184 BRH20009 230 2600 CSN 13185 BRH20010 377 2600 CSN 13177 BRH20010 376 3600 CSN 13181 BRH20009 199 3600 CSN 13186 BRH20010 366 3600 CSN 13187 BRH20009 224 3600 CSN 13192 BRH20009 202 3600 CSN 13193 BRH20009 225 3600 CSN (b) Remove HPT stage 2 disks listed in Table 2 before exceeding 3800 CSN, and replace with serviceable disks. Table 2.—HPT Stage 2 Disks by Engine SN, Disk P/N, and Disk SN Engine Serial No. Disk P/N Disk SN 13111 BRH19349 316 13112 BRH19349 318 13114 BRH19349 317 13120 BRH19350 301 13138 BRH19350 334 (c) After effective date of this AD, do not install any HPT stage 1 or stage 2 disks except as allowed by paragraphs (a), (b), or (d) of this AD. Alternative Methods of Compliance (d) 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, Engine Certification Office (ECO). Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, ECO. Note 2: Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from the ECO. Special Flight Permits (e) 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 aircraft to a location where the requirements of this AD can be accomplished. Effective Date of This AD (f) This amendment becomes effective on February 20, 2001, to all owners and operators except those to whom it was made immediately effective by emergency AD 2000-25-51, issued on December 4, 2000, which contained the requirements of this amendment. Issued in Burlington, Massachusetts on January 24, 2001. Thomas A. Boudreau, Acting Manager, Engine and Propeller Directorate, Aircraft Certification Service. [FR Doc. 01-2609 Filed 2-1-01; 8:45 am] BILLING CODE 4910-13-U
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