Airworthiness directives › 2017-26-08
AD 2017-26-08 Airworthiness Directives; ATR-GIE Avions de Transport Régional Airplanes
Models named: ATR42-500, ATR72-212A. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to ATR-GIE Avions de Transport Régional Model ATR42-500 airplanes, and Model ATR72-212A airplanes; certificated in any category; all manufacturer serial numbers on which ATR-GIE Avions de Transport Régional Modification 5948 (New Avionics Suite installation) has been embodied in production, except those airplanes identified in paragraphs (c)(1) and (c)(2) of this AD. (1) Airplanes on which ATR-GIE Avions de Transport Régional Mod 6977 (New Avionics Suite Standard 2) has been embodied in production. (2) Airplanes on which ATR Service Bulletin ATR42-31-0091, or ATR Service Bulletin ATR72-31-1092, has been incorporated.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 30 days after the effective date of this AD, revise the Limitations Section of the applicable ATR-42 and ATR-72 airplane flight manuals (AFMs) to include figure 1 to paragraph (g) of this AD. Amending the AFM of an airplane by inserting a copy of this AD into the applicable AFM of that airplane is acceptable to comply with the requirements of this paragraph for that airplane. ER03JA18.004
Unsafe condition
This AD was prompted by flight evaluations that revealed that after engine failure during autopilot (AP) or yaw damper (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 provide procedures to the flightcrew for operational restrictions affecting in-flight use of the autopilot (AP) or yaw damper (YD) during dual-engine operation.
Affected ADs
None.
Read the original on the Federal Register →
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1