Airworthiness Directive 2017-26-08
one-timeAirworthiness Directives; ATR-GIE Avions de Transport Régional Airplanes
What this AD requires
We are adopting a new airworthiness directive (AD) for certain ATR-GIE Avions de Transport R[eacute]gional Model ATR42-500 and ATR72- 212A airplanes. This AD requires revising the airplane flight manual (AFM) to provide procedures to the flight crew for operational restrictions affecting in-flight use of the autopilot (AP) or yaw damper (YD) during dual-engine operation. This AD also provides an optional software modification, which would terminate the AFM requirement. This AD was prompted by flight test evaluations that revealed that after engine failure during AP or YD re-engagement, the YD unit commanded the rudder to return to neutral position, leading to inadequate balancing of the asymmetric power. We are issuing this AD to address the unsafe condition on these products.
Which aircraft AD 2017-26-08 applies to
Applies to all manufacturer serial numbers on which ATR Modification 5948 (New Avionics Suite installation) has been embodied in production, except airplanes on which ATR Modification 6977 (New Avionics Suite Standard 2) has been embodied in production, or on which ATR Service Bulletin ATR42-31-0091 or ATR72-31-1092 has been incorporated.
Whether AD 2017-26-08 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.
How AD compliance is recorded
A valid compliance record (14 CFR 43.9) states:
Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.
Look up a tail number →Read the full directive (Federal Register)Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.