Airworthiness directives › 97-11-07
AD 97-11-07 Airworthiness Directives; McDonnell Douglas Model MD-90-30 Airplanes
Models named: MD-90-30. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
All Model MD-90-30 airplanes, 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 (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
Required as indicated, unless accomplished previously. To ensure continued structural integrity of these airplanes, accomplish the following: (a) Within 180 days after the effective date of this AD, revise the Airworthiness Limitations Section of the Instructions for Continued Airworthiness [Airworthiness Limitations Instructions (ALI), McDonnell Douglas Report No. MDC-94K9000, dated November 1994] to incorporate the Item, Location, and Inspection Interval of the following principal structural elements: This may be accomplished by inserting a copy of Revision 1 of the ALI, dated January 1995, or a copy of this AD into the ALI. ------------------------------------------------------------------------ Inspection interval (in landings) Item Location ------------------------- Initial Repeat ------------------------------------------------------------------------ Item 53.30.02.3......... Skin Panels, STA 237 60,000 11,000 to 1395 Fuselage Skin in Constant Section from Longeron 3 Left to Longeron 3 Right. Item 53.30.02.4......... Skin Panels, STA 237 60,000 30,000 to 1395 Fuselage Hoop Skin Splice in Constant Section from Longeron 5 Left to Longeron 5 Right. Item 54.10.04.1......... Thrust Bulkhead, 15,000 4,500 Pylon--STA Yn 170.5--Rear Spar and Engine Thrust Support Fitting (Upper and Lower). ------------------------------------------------------------------------ (b) Within 180 days after the effective date of this AD, revise the Airworthiness Limitations Section of the Instructions for Continued Airworthiness [Airworthiness Limitations Instructions (ALI), McDonnell Douglas Report No. MDC-94K9000, dated November 1994] to incorporate the Item, Location, and Inspection Interval of the following principal structural elements: This may be accomplished by inserting a copy of Revision 2 to the ALI, dated July 1996, or a copy this AD into the ALI. ------------------------------------------------------------------------ Inspection interval (in landings) Item Location ------------------------- Initial Repeat ------------------------------------------------------------------------ Item 55.13.01.1......... Plates/Skin--Upper 60,000 8,100 STA Xh 27.2 Left to Xh 27.2 Right-- Upper Aft Skin Plank with Integral Stringers from Xh 7.234 to Xh 26.859. ------------------------------------------------------------------------ (c) Except as provided in paragraph (d) of this AD: After the actions specified in paragraphs (a) and (b) of this AD have been accomplished, no alternative inspections or inspection intervals may be approved for the parts specified in paragraph (a) and (b) of this AD. (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, Los Angeles 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, Los Angeles ACO. Note 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Los Angeles ACO. (e) 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. (f) This amendment becomes effective on June 26, 1997. Issued in Renton, Washington, on May 16, 1997. Darrell M. Pederson, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 97-13467 Filed 5-21-97; 8:45 am] BILLING CODE 4910-13-U
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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