Airworthiness directives › 2014-24-03
AD 2014-24-03 Airworthiness Directives; The Boeing Company Airplanes
Models named: MD-90-30. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to all The Boeing Company Model MD-90-30 airplanes, certificated in any category.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
This paragraph restates the requirements of paragraph (a) of AD 97-11-07, Amendment 39-10036 (62 FR 27941, May 22, 1997). Within 180 days after June 26, 1997 (the effective date of AD 97-11-07), revise the Airworthiness Limitations Section of the Instructions for Continued Airworthiness to incorporate the Item, Location, and Inspection Interval of PSEs identified in paragraphs (g)(1) through (g)(3) of this AD. This may be accomplished by inserting a copy of this AD into the ALI, or by using a method approved by the Manager, Los Angeles Aircraft Certification Office (ACO), FAA. (1) For Item 53.30.02.3 at Skin Panels, station (STA) 237 to 1395 Fuselage Skin in Constant Section from Longeron 3 Left to Longeron 3 Right: the initial interval is 60,000 landings. Repeat the inspection thereafter at intervals not to exceed 11,000 landings. (2) For Item 53.30.02.4 at Skin Panels, STA 237 to 1395 Fuselage Hoop Skin Splice in Constant Section from Longeron 5 Left to Longeron 5 Right: the initial interval is 60,000 landings. Repeat the inspection thereafter at intervals not to exceed 30,000 landings. (3) For Item 54.10.04.1 at Thrust Bulkhead, Pylon—STA Yn 170.5—Rear Spar and Engine Thrust Support Fitting (Upper and Lower): the initial interval is 15,000 landings. Repeat the inspection thereafter at intervals not to exceed 4,500 landings.
Unsafe condition
This AD was prompted by an analysis of data that identified a need to introduce a new principal structural element (PSE) requirement for the rear spar caps of the horizontal stabilizer. We are issuing this AD to detect and correct fatigue cracking of PSEs and certain safe-life limited parts, which could adversely affect the structural integrity of the airplane.
Affected ADs
This AD replaces AD 97-11-07, Amendment 39-10036 (62 FR 27941, May 22, 1997); and AD 99-18-23, Amendment 39-11289 (64 FR 48284, September 3, 1999).
Read the original on the Federal Register →
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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