Airworthiness Directive · Amendment 39-19613 · Engine oil storage
Robinson Helicopter Company Helicopters
This AD applies to Robinson Helicopter Company Model R66 helicopters, serial numbers 0003 through 0789, 0791, 0794 and 0796, certificated in any category.
We are adopting a new airworthiness directive (AD) for certain Robinson Helicopter Company (Robinson Helicopter) Model R66 helicopters. This AD requires inspecting the oil tank outlet's fitting color. If the fitting is blue, this AD requires replacing the tank with an oil tank that lacks a blue fitting. This AD also requires determining the revision letter on the ink stamp, and installing an oil tank angle based on that determination. This AD was prompted by reports of broken oil tank internal baffles. The actions of this AD are intended to correct an unsafe condition on these products.
You are responsible for performing each action required by this AD within the specified compliance time unless it has already been accomplished prior to that time.
Within 100 hours time-in-service:
(1) Visually inspect the oil tank outlet fitting color to determine if it is blue. If the fitting is blue, before further flight, replace the tank with an oil tank that does not have a blue fitting.
(2) Locate the G689-1 oil tank assembly identification ink stamp on the top surface of the oil tank, and determine the revision letter.
(i) If the identification ink stamp is followed by a revision letter F, G, H, or I unless previously installed, install a G805-1 angle as follows:
(A) Drain the engine oil and disconnect the F723-1 line assembly from the tank fitting at the firewall, using as reference Figure 1 of Robinson Helicopter Company R66 Service Bulletin SB-21A, Revision A, dated June 6, 2017.
(B) Pinch the flanges of G805-1 angle at the minimum required to enable insertion, and insert the angle in the oil tank outlet fitting until the angle snaps in place.
(C) Connect the F723-1 line assembly to the tank fitting. Special torque nut to 675 in.-lb. Torque stripe the fitting.
(ii) If the identification ink stamp is followed by a revision letter J, determine if there is a yellow dot near the ink stamp. A yellow dot indicates that the angle has been pre-installed and that no further action is required by this AD. If there is not a yellow dot near the ink stamp, install a G805-1 angle by following the procedures in paragraphs (e)(2)(i)(A) through (e)(2)(i)(C) of this AD.
(iii) If the identification ink stamp is followed by a revision letter K, no further action is required by this AD.
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
