Airworthiness Directive · Amendment 39-19020 · Hydraulic power
Textron Aviation Inc. Airplanes
This AD applies to Textron Aviation Inc. (type certificate previously held by Beechcraft Corporation) Model 390 airplanes; serial numbers RB-4 through RB-295; certificated in any category.
We are adopting a new airworthiness directive (AD) for certain Textron Aviation Inc. Model 390 airplanes (type certificate previously held by Beechcraft Corporation). This AD was prompted by reports of hydraulic fluid loss from the engine driven pumps (EDPs) on three different airplanes. This AD requires an inspection to determine if an affected EDP is installed with replacement as necessary. We are issuing this AD to address the unsafe condition on these products.
Within 100 hours time-in service (TIS) after October 16, 2017 (the effective date of this AD), inspect the airplane to determine if any affected serial number EDP, part number (P/N) 66179-01 (Beechcraft/Textron P/N 390-389022-0003), is installed on the airplane following the Accomplishment Instructions in Beechcraft Mandatory Service Bulletin SB 29-4161, dated November 18, 2016. Use table 1 in Parker Service Bulletin 66179-29-486, dated August 4, 2016, to identify the affected serial numbers of EDP, P/N 66179-01 (Beechcraft/Textron P/N 390-389022-0003).
If any affected serial number EDP was found during the inspection required in paragraph (g) of this AD, within 100 hours TIS after October 16, 2017 (the effective date of this AD), replace any affected serial number EDP, P/N 66179-01 (Beechcraft/Textron P/N 390-389022-0003), with a serviceable serial number EDP, P/N 66179-01 (Beechcraft/Textron P/N 390-389022-0003) that is either not listed in table 1 of Parker Service Bulletin 66179-29-486, dated August 4, 2016, or has been reworked following Parker Service Bulletin 66179-29-486, dated August 4, 2016. Use the Accomplishment Instructions in Beechcraft Mandatory Service Bulletin SB 29-4161, dated November 18, 2016, to do the replacement actions.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
