AD 2003-16-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Learjet | 45 | Airworthiness Directives; Learjet Model 45 Airplanes |
Unsafe Condition
Failure of shear pins in the trunnion assemblies of the main landing gears (MLGs) due to hydrogen penetration causing material brittleness and premature failure.
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Required Actions
Replace certain shear pins in the trunnion assemblies of the MLGs with new, improved shear pins as specified in Bombardier Service Bulletin 45-57-6 and Learjet 45 Maintenance Manual Revision 32. Reidentify the trunnion assemblies after replacement.
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Compliance Time
Before further flight
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Affected Aircraft
Learjet Model 45 airplanes, serial numbers 45-005 through 45-208, 45-210 through 45-222, 45-224, 45-225, 45-227, and 45-229 through 45-231.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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