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Airworthiness directives › 2000-18-06

AD 2000-18-06 Airworthiness Directives; Allison Engine Company AE 3007A and 3007C Series Turbofan Engines

2000-09-22
2000-09-07
39-11891
2000-NE-33-AD
Engine
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Models named: AE 3007A, AE 3007A1/1, AE 3007A1/2, AE 3007A1, AE 3007A1/3, AE 3007A1P, AE 3007A3, AE 3007C turbofan, EMB-145, EMB-145ER. Read the applicability below — it usually turns on serial or part numbers too.

Applicability*9

This AD is applicable to Allison Engine Company Models AE 3007A, AE 3007A1/1, AE 3007A1/2, AE 3007A1, AE 3007A1/3, AE 3007A1P, AE 3007A3, and AE 3007C turbofan engines with full authority digital electronic controls (FADEC's) that have the following hardware serial numbers (SN's) installed:   Engine model FADEC hardware SN AE 3007C BX55758, BX55760, BX55761, BX55763 through BX55765, BX55767, and BX61001 through BX61069, unless the FADEC has been repaired and marked as provided in paragraphs (f) and (g) of this AD. AE 3007A, AE 3007A1/1, AE 3007A1/2, AE3007A1/3, AE 3007A1, AE 3007A1P, AE 3007A3 BX56348, BX56361 through BX56364, BX56374, BX56376, BX56392 through BX56395, BX59006, BX59007, BX59013, BX59014, BX59041, BX59050, BX59062, BX59064 through BX59066, BX59075 through BX59078, BX60000 through BX60145, BX60172 through BX60239, BX60265 through BX60287, BX60301, BX60303, BX60311, BX60381 through BX60384, unless the FADEC has been repaired and marked as provided in paragraphs (f) and (g) of this AD. These engines are installed on, but not limited to Embraer Model EMB-145, EMB-145ER, EMB-145MR, EMB-145LR, EMB-135ER, EMB-135LR, and Cessna 750 airplanes. Note 1: This airworthiness directive (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 (h) 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 below, unless already done. To prevent an uncommanded in-flight engine shutdown and the potential for an in-flight dual-engine shutdown, do the following: Inspection for FADEC Serial Number and Removal of FADEC's (a) Before further flight, inspect the FADEC for a SN that is listed in “Applicability” of this AD to be sure that no airplane has more than one engine with FADEC's that have suspect hardware SN's. The engine may have two FADEC's that have suspect hardware SN's. (b) If more than one engine per airplane is found with a FADEC that has a suspect hardware SN, remove the FADEC so there is only one engine per airplane with a FADEC that has a suspect hardware SN. (c) Removed suspect FADEC's may be returned to local stock. (d) The suspect FADEC's may be installed on another airplane as long as the requirements of paragraphs (a) and (e) of this AD are met. Replacement of All Suspect FADEC's (e) Replace all FADEC's that have suspect hardware SN's with serviceable FADEC's within 3 months after the effective date of this AD. (f) After 3 months from the effective date of this AD, do not install a FADEC that has a hardware SN listed in “Applicability” of this AD on any engine unless the FADEC hardware has been repaired and the modification tag on the FADEC is marked with TR1 day/month. For example, a repair that was accomplished on September 25, 2000, will show as TR1 25/09. Definition of a Serviceable FADEC (g) For the purpose of this AD, a serviceable FADEC is a FADEC that does not have a hardware SN listed in “Applicability” of this AD, unless the FADEC with the suspect hardware SN has been modified using Rolls-Royce (RR) service bulletin (SB) AE 3007A-73-042, Revision 1, dated August 23, 2000; or RR SB AE 3007C-73-024, Revision 1, dated August 23, 2000. Alternative Methods of Compliance (h) An alternative method of compliance (AMOC) 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. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Chicago Aircraft Certification Office. Note 2: Information concerning the existence of any approved AMOC with this airworthiness directive, may be obtained from the Chicago Aircraft Certification Office. Special Flight Permit (i) 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 (j) This amendment becomes effective on September 22, 2000. Issued in Burlington, Massachusetts, on August 31, 2000. David A. Downey, Assistant Manager, Engine and Propeller Directorate, Aircraft Certification Service. [FR Doc. 00-22906 Filed 9-6-00; 8:45 am] BILLING CODE 4910-13-P

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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1