Airworthiness Directive · Amendment 39-16880 · Engine air intake system
Quest Aircraft Design, LLC Airplanes
This AD applies to Quest Aircraft Design, LLC Model Kodiak 100 airplanes, serial numbers 100-0001 through 100-0056, certificated in any category.
We are adopting a new airworthiness directive (AD) for certain Quest Aircraft Design, LLC (Quest) Model Kodiak 100 airplanes. This AD requires you to inspect the torque of the inertial particle separator (IPS) bolts; correct the torque, if necessary; replace the IPS bolts with new IPS bolts within a certain time; and install safety wire around the new IPS bolts. This AD was prompted by five instances where a loose IPS bolt was found on the right-hand side of the engine bypass door attachment. This condition, if not corrected, could lead to an inoperable bypass door, which could result in engine inlet icing with consequent loss of engine power and forced landing. We are issuing this AD to correct the unsafe condition on these products.
Before further flight on or after December 19, 2011 (the effective date of this AD), inspect the torque of the IPS bolt, part number (P/N) AN4-4A, and re-torque, if necessary, following Quest Aircraft Company Field Service Instruction No. FSI-028, Revision 02, (undated) as specified in Mandatory Service Bulletin No. SB11-17, Revision: 00, dated November 1, 2011.
Within 15 hours time-in-service (TIS) after December 19, 2011 (the effective date of this AD), replace the IPS bolts, P/N AN4-4A and P/N AN4-5A, with new IPS bolts, P/N AN4H4A and P/N AN4H5A, respectively. After installing the new bolts, install safety wire around the new bolts. Do the actions following Quest Aircraft Company Field Service Instruction No. FSI-028, Revision 02, (undated) as specified in Mandatory Service Bulletin No. SB11-17, Revision: 00, dated November 1, 2011.
As of December 19, 2011 (the effective date of this AD), do not install any IPS bolts, P/N AN4-4A or P/N AN4-5A.
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.
