AD 98-16-21
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | ATR - GIE Avions de Transport Régional | ATR42-200 | Airworthiness Directives; Aerospatiale Model ATR42 and ATR72 Series Airplanes |
| aircraft | ATR - GIE Avions de Transport Régional | ATR42-300 | Airworthiness Directives; Aerospatiale Model ATR42 and ATR72 Series Airplanes |
| aircraft | ATR - GIE Avions de Transport Régional | ATR42-320 | Airworthiness Directives; Aerospatiale Model ATR42 and ATR72 Series Airplanes |
| aircraft | ATR - GIE Avions de Transport Régional | ATR42-500 | Airworthiness Directives; Aerospatiale Model ATR42 and ATR72 Series Airplanes |
| aircraft | ATR - GIE Avions de Transport Régional | ATR72-101 | Airworthiness Directives; Aerospatiale Model ATR42 and ATR72 Series Airplanes |
| aircraft | ATR - GIE Avions de Transport Régional | ATR72-102 | Airworthiness Directives; Aerospatiale Model ATR42 and ATR72 Series Airplanes |
| aircraft | ATR - GIE Avions de Transport Régional | ATR72-201 | Airworthiness Directives; Aerospatiale Model ATR42 and ATR72 Series Airplanes |
| aircraft | ATR - GIE Avions de Transport Régional | ATR72-202 | Airworthiness Directives; Aerospatiale Model ATR42 and ATR72 Series Airplanes |
| aircraft | ATR - GIE Avions de Transport Régional | ATR72-211 | Airworthiness Directives; Aerospatiale Model ATR42 and ATR72 Series Airplanes |
| aircraft | ATR - GIE Avions de Transport Régional | ATR72-212 | Airworthiness Directives; Aerospatiale Model ATR42 and ATR72 Series Airplanes |
Unsafe Condition
Wear (scratches or grooving) of the aft upper fittings of the rear engine mount and incorrect shape of the stiffeners for the upper engine cowl, leading to reduced structural integrity of the engine mounts.
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Required Actions
Perform one-time inspections of the stiffeners for the upper engine cowls to verify correct lower edge profile and inspect for wear of the aft upper fittings of the rear engine mounts. Modify or replace stiffeners not meeting specifications and repair worn fittings as specified in service bulletins, prior to further flight if non-compliant.
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Compliance Time
Within 10 months after the effective date of this AD
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Affected Aircraft
Aerospatiale Model ATR42 and ATR72 series airplanes listed in Service Bulletins ATR42-54-0019 and ATR72-54-1011, dated March 9, 1998, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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