AD 2011-21-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc. Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Bombardier, Inc. Airplanes |
Unsafe Condition
During or after heavy rain, the pitot-static tubing may become partially or completely blocked by water, which fails to enter the drain bottles due to check valves in the drain bottles. This can result in erroneous airspeed and altitude indications.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the water accumulator assemblies in the primary pitot-static system with new water accumulator assemblies to improve drainage of the pitot-static tubing.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
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Affected Aircraft
Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440), serial numbers 7003 through 7067 inclusive, 7069 through 7990 inclusive, 8000 through 8107 inclusive, and subsequent; all Model CL-600-2C10 (Regional Jet Series 700, 701, & 702); all Model CL-600-2D15 (Regional Jet Series 705); and all Model CL-600-2D24 (Regional Jet Series 900) airplanes.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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