AD 99-04-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | 1900 | Airworthiness Directives; Raytheon Aircraft Company Models 1900, 1900C, and 1900D Airplanes |
| aircraft | Textron Aviation Inc. | 1900C | Airworthiness Directives; Raytheon Aircraft Company Models 1900, 1900C, and 1900D Airplanes |
| aircraft | Textron Aviation Inc. | 1900C (C-12J) | Airworthiness Directives; Raytheon Aircraft Company Models 1900, 1900C, and 1900D Airplanes |
| aircraft | Textron Aviation Inc. | 1900D | Airworthiness Directives; Raytheon Aircraft Company Models 1900, 1900C, and 1900D Airplanes |
Unsafe Condition
Fatigue cracks in the end cap of main landing gear hydraulic actuators manufactured by Frisby Aerospace could cause the main landing gear to fail to lock down, leading to loss of control during landing, taxi, or ground operations.
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Required Actions
Inspect main landing gear hydraulic actuators for Frisby Aerospace part numbers 114-380041-11 or 114-380041-13 per Raytheon SB.32-3141. Remove any affected actuators and either replace with approved parts per maintenance manual or rework using Frisby Aerospace SB 1FA10043-0001.
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Compliance Time
Within specified time frames based on actuator time-in-service (TIS): for example, within next 600 hours TIS after effective date (March 26, 1999) if actuator has 6,000-6,999 hours TIS, or earlier if nearing 6,600 hours TIS. Actions must be completed prior to further flight after inspection.
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Affected Aircraft
Raytheon Aircraft Company Models 1900 (serials UA-2, UA-3), 1900C (UB-1-UB-74, UC-1-UC-174), 1900C (C-12J) (UD-1-UD-6), and 1900D (UE-1-UE-299).
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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