AD 2003-17-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Learjet | 45 | Airworthiness Directives; Learjet Model 45 Airplanes |
Unsafe Condition
Moisture contamination and subsequent formation of ice could cause bending and damage of the squat switch assembly of the nose landing gear (NLG), driving the nose wheel to an uncommanded angle against the force of the steering system, and consequently resulting in the airplane departing the runway at high speeds during landing.
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Required Actions
Within 30 days after December 6, 2000, apply grease to the rotating disk assembly of the squat switch mechanism of the nose wheel in accordance with Bombardier Service Information Letter SIL 32-016. Repeat this application at intervals not to exceed 30 days until the replacement required by paragraph (b) is accomplished. Within 300 flight hours or 12 months after the effective date of this AD, whichever occurs first, replace the camrod of the squat switch assembly of the NLG with a new assembly in accordance with Bombardier Service Bulletin SB 45-32-8, Revision 2.
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Compliance Time
Within 300 flight hours or 12 months after the effective date of this AD, whichever occurs first.
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Affected Aircraft
Learjet Model 45 airplanes, certificated in any category; serial numbers (S/N) 45-005 through 45-071 inclusive, that have been modified per Bombardier Service Bulletin 45-32-3; and S/Ns 45-072 through 45-114 inclusive.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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