Airworthiness directives › 2020-19-10
AD 2020-19-10 Airworthiness Directives; Piaggio Aero Industries S.p.A.
Models named: P-180. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Piaggio Aero Industries S.p.A. Model P-180 airplanes, certificated in any category.
Compliance
Unless already done, do the following actions in paragraphs (f)(1) through (3) of this AD. (1) For airplanes with NLG steering manifold part number (P/N) 72608 installed: (i) Within 50 hours time-in service after the effective date of this AD, do a steering manifold pressure leakage test and, if there is steering actuator movement during the test, replace the NLG steering manifold and repeat the test by following the Accomplishment Instructions, procedure steps (1) through (24), in Piaggio Aerospace Service Bulletin No. 80-0325, Revision 0, dated August 10, 2017. (ii) If steering actuator movement occurs during procedure step (9) or procedure step (15) of the leakage test required in paragraph (f)(1)(i) of this AD, replacing the NLG steering manifold and repeating the steering manifold pressure leakage test is required before further flight. (2) For all airplanes, after the effective date of this AD, do not install NLG steering manifold P/N 72608 on any airplane unless it has been inspected as specified in paragraph (f)(1) of this AD and no steering actuator movement occurred. (3) For all airplanes, within 30 days after the effective date of this AD, revise the airplane flight manual (AFM) by replacing certain pages in the Emergency Procedures section of the AFM by following the Instructions in Piaggio Aerospace P.180 AVANTI II/EVO Temporary Change No. 89, dated August 30, 2017.
Required actions
Refer to MCAI European Aviation Safety Agency AD No. 2017-0229, dated November 21, 2017, for related information. You may examine the MCAI on the internet at https://www.regulations.gov by searching for and locating Docket No. FAA-2019-0412.
Unsafe condition
This AD was prompted by mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as insufficient sealing of a steering select/bypass valve installed in the nose landing gear (NLG) manifold. The FAA is issuing this AD to detect and correct insufficient sealing of the steering select/bypass valve in the NLG steering manifold, which could lead to un-commanded NLG wheel turns with consequent lateral runway departure.
Affected ADs
None.
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