AD 99-04-24
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | ATR - GIE Avions de Transport Régional | ATR72-102 | Airworthiness Directives; Aerospatiale Model ATR72 Series Airplanes |
| aircraft | ATR - GIE Avions de Transport Régional | ATR72-201 | Airworthiness Directives; Aerospatiale Model ATR72 Series Airplanes |
| aircraft | ATR - GIE Avions de Transport Régional | ATR72-202 | Airworthiness Directives; Aerospatiale Model ATR72 Series Airplanes |
| aircraft | ATR - GIE Avions de Transport Régional | ATR72-212 | Airworthiness Directives; Aerospatiale Model ATR72 Series Airplanes |
| aircraft | ATR - GIE Avions de Transport Régional | ATR72-212A | Airworthiness Directives; Aerospatiale Model ATR72 Series Airplanes |
Unsafe Condition
Failure of anchor nuts on the upper surface of the wings, which could result in reduced structural integrity of the airplane.
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Required Actions
Inspect the anchor nuts (part number NAS1473A5) on the upper surface of the wings in accordance with Avions de Transport Regional Service Bulletin ATR72-57-1019 or Revision 1. Replace damaged nuts within allowable limits before 4,000 flight cycles; repair immediately if damage exceeds limits.
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Compliance Time
Within 6 months after the effective date of this AD (March 30, 1999).
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Affected Aircraft
Aerospatiale Model ATR72-102, -201, -202, -212, and -212A airplanes as listed in Avions de Transport Regional Service Bulletin ATR72-57-1019.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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