Airworthiness directives › 2017-10-09
AD 2017-10-09 Airworthiness Directives; Textron Aviation Inc. Airplanes
Makes named: textron aviation, cessna. Models named: 402C, 414A. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Textron Aviation Inc. (type certificate previously held by Cessna Aircraft Company) Model 402C airplanes, serial numbers 402C0001 through 402C1020, and Model 414A airplanes, serial numbers 414A0001 through 414A1212, that are certificated in any category; and are equipped with either of the following: (1) Cessna Multi-Engine Service Kit SK402-47, “Lower Front Wing Spar Cap Inspection/Modification,” Original Issue, Revision A, or Revision B; or (2) Nacelle fittings part numbers (P/Ns) 5292029-9, 5292029-10, 5292029-11, 5292029-12, 5292029-21, 5292029-22, 5292029-23, or 5292029-24. Note 1 to paragraph (c) of this AD: P/Ns 5292029-9, 5292029-10, 5292029-11, 5292029-12, 5292029-21, 5292029-22, 5292029-23, or 5292029-24 were installed when the Cessna Multi-Engine Service Kit SK402-47 was installed.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Inspect the nacelle fitting following the Accomplishment Instructions (except for paragraph 6) in Textron Aviation Mandatory Multi-engine Service Letter MEL-54-02, Revision 2, dated March 29, 2017, at the applicable compliance times specified in paragraphs (g)(1) through (2) of this AD. (1) For airplanes with less than 7,400 hours time-in-service (TIS) on the affected nacelle fitting: Before or upon accumulating 3,500 hours (TIS) on the nacelle fitting or within the next 100 hours TIS after June 7, 2017 (the effective date of this AD), whichever occurs later. Repetitively thereafter inspect every 120 hours TIS until the nacelle fitting has reached 7,500 hours TIS. When the airplane reaches 7,500 hours TIS on the affected nacelle fitting, the repetitive inspection time must be changed to 60 hours TIS. A 10-hour TIS grace period is allowed for those airplanes between 51 and 110 hours TIS for the first repetitive inspection when the airplane reaches 7,500 hours TIS on the nacelle. (2) For airplanes with 7,400 hours TIS or more on the affected nacelle fitting: Before or upon accumulating 7,500 hours TIS on the nacelle fitting or within the next 25 hours TIS after June 7, 2017 (the effective date of this AD), whichever occurs later. Repetitively thereafter inspect every 60 hours TIS.
Unsafe condition
This AD was prompted by reports of cracks found on certain nacelle fittings. We are issuing this AD to detect and correct cracks on the nacelle fitting, which could cause the nacelle fitting to fail. This failure could result in engine nacelle separation and loss of control. We are issuing this AD to correct the unsafe condition on these products.
Affected ADs
None.
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