AD 94-15-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | ATR - GIE Avions de Transport R gional | ATR72-101 | Airworthiness Directives; Aerospatiale Model ATR72 Series Airplanes |
| aircraft | ATR - GIE Avions de Transport R gional | ATR72-102 | Airworthiness Directives; Aerospatiale Model ATR72 Series Airplanes |
| aircraft | ATR - GIE Avions de Transport R gional | ATR72-201 | Airworthiness Directives; Aerospatiale Model ATR72 Series Airplanes |
| aircraft | ATR - GIE Avions de Transport R gional | ATR72-202 | Airworthiness Directives; Aerospatiale Model ATR72 Series Airplanes |
| aircraft | ATR - GIE Avions de Transport R gional | ATR72-211 | Airworthiness Directives; Aerospatiale Model ATR72 Series Airplanes |
| aircraft | ATR - GIE Avions de Transport R gional | ATR72-212 | Airworthiness Directives; Aerospatiale Model ATR72 Series Airplanes |
| aircraft | ATR - GIE Avions de Transport R gional | ATR72-212A | Airworthiness Directives; Aerospatiale Model ATR72 Series Airplanes |
Unsafe Condition
Rupture of the upper hinge pins in the shock absorber on the main landing gear (MLG) due to stress corrosion of the pins inside the pin. Corrosion inside the hinge pins could result in malfunction of the shock absorber on the MLG, leading to loss of the MLG during a hard landing.
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Required Actions
Perform a visual inspection (using a borescope) to detect damage to the protective treatments on the inside diameter of the upper hinge pins on each shock absorber on the MLG, following Messier-Bugatti Service Bulletin 631-32-099. Depending on findings, strip damaged protective treatments, inspect for base metal corrosion, and repair or replace pins as required. Repetitive inspections must be done at intervals not exceeding 4,000 landings.
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Compliance Time
Required as indicated, unless accomplished previously. Specific compliance timelines depend on MLG total landings as of the effective date (August 8, 1994): (1) For MLG with >9,000 landings: within 300 landings after the effective date. (2) For 6,000-9,000 landings: before 9,300 landings or within 1,000 landings after effective date, whichever comes first. (3) For <6,000 landings: before 7,000 landings or within 3,000 landings after effective date, whichever occurs later.
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Affected Aircraft
Aerospatiale Model ATR72 series airplanes (ATR72-101, ATR72-102, ATR72-201, ATR72-202, ATR72-211, ATR72-212, ATR72-212A), all serial numbers, 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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