Airworthiness directives › 2021-11-16
AD 2021-11-16 Airworthiness Directives; Piper Aircraft, Inc. Airplanes
Makes named: piper. Models named: PA-36-285, PA-36-300, PA-36-375. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Piper Aircraft, Inc. Models PA-36-285, PA-36-300, and PA-36-375 airplanes, certificated in any category.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) For Models PA-36-285 and PA-36-300 airplanes, serial numbers 36-7360001 through 36-7560003, with a wing spar carry through assembly part number (P/N) 97370-00 installed, before the airplane accumulates a total of 2,000 hours time-in-service (TIS) or within 25 hours TIS after the effective date of this AD, whichever occurs later, and thereafter at intervals not to exceed 100 hours TIS, inspect the wing spar carry through assembly by following the Instructions, section 1, of Piper Service Bulletin No. 552A, dated August 3, 2018, (Piper SB No. 552A). (2) If any damage is found during any inspection required by paragraph (g)(1) of this AD, before further flight, repair or replace the wing spar carry through assembly by following the Instructions, section 2, of Piper SB No. 552A. (3) Replacing wing spar carry through assembly P/N 97370-00 with wing spar carry through assembly P/N 76824-02 terminates the repetitive inspections required by paragraph (g)(1) of this AD.
Unsafe condition
This AD was prompted by a review of AD 83-20-03 and AD 79-01-03 and the determination that the requirements of those ADs did not address all of the affected airplanes. The FAA is issuing this AD to prevent fatigue damage to the wing structural components. The unsafe condition, if not addressed, could result in failure of the wing structure with consequent loss of control.
Affected ADs
This AD replaces AD 79-01-03, Amendment 39-3383 (44 FR 36, January 2, 1979) (AD 79-01-03); and AD 83-20-03, Amendment 39-4739 (48 FR 45535, October 6, 1983) (AD 83-20-03).
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