AD 98-18-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | SOCATA | TB 20 | Airworthiness Directives; SOCATA - Groupe AEROSPATIALE Models TB20 and TB21 Airplanes |
| aircraft | SOCATA | TB 21 | Airworthiness Directives; SOCATA - Groupe AEROSPATIALE Models TB20 and TB21 Airplanes |
Unsafe Condition
Cracks in the main landing gear (MLG) attachment bearing could result in collapse of the main landing gear during taxi and landing operations.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the MLG attachment bearing using a dye penetrant method at specified intervals. If cracks are found, replace the bearing before further flight. Repeat inspections after replacement as required.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 100 hours time-in-service after the effective date of this AD, or upon accumulation of 6,000 landings or 4,000 hours time-in-service, whichever occurs later. Subsequent inspections must be done within 1,500 landings or 1,000 hours time-in-service after the previous inspection.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
SOCATA-Groupe AEROSPATIALE Models TB20 and TB21 airplanes, serial numbers 1 through 9999.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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