Airworthiness directives › 2019-10-06
AD 2019-10-06 Airworthiness Directives; Aviat Aircraft Inc. Airplanes
Makes named: aviat. Models named: A-1C-180, A-1C-200. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Aviat Aircraft Inc. (Aviat) Models A-1C-180 and A-1C-200 airplanes, serial numbers 3181 through 3282, certificated in any category, that are equipped with a Rapco part number (P/N) RA1798-00-1 fuel vent check valve on one or both wings.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Before further flight after July 22, 2019 (the effective date of this AD), revise the airplane flight manual (AFM) as follows: (1) Insert into the Limitations Section of the AFM steps 1 through 3 of the Accomplishment Instructions in Aviat Aircraft Inc. Mandatory Service Bulletin (MSB) No. 33, Initial Release, dated November 11, 2016 (Aviat SB, No. 33, IR). (2) Immediately following steps 1 through 3, add the following language to the Limitations Section of the AFM: Step 4. If there is a stuck fuel vent check valve, it must be replaced in accordance with AD 2019-10-06 before further flight. (3) This AFM revision requires preflight checks of the fuel vent check valve on each wing. This insertion and the steps therein may be performed by the owner/operator (pilot) holding at least a private pilot certificate. The AFM revision must be entered into the aircraft records showing compliance with this AD in accordance with 14 CFR 91.417(a)(2)(v). The record must be maintained as required by 14 CFR 91.417, 121.380, or 135.439.
Unsafe condition
This AD was prompted by a report that Rapco P/N RA1798-00-1 fuel vent check valves are sticking in the closed position. We are issuing this AD to detect and correct failure of the fuel tank vent check valve, which could result in fuel starvation to the engine and cause the engine to shut down.
Affected ADs
None.
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