AD 2011-07-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc. Model BD-100-1A10 (Challenger 300) Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Bombardier, Inc. Model BD-100-1A10 (Challenger 300) Airplanes |
Unsafe Condition
Partial blockage of a safety valve cabin pressure-sensing port, caused by accumulation of lint/dust on the grid of the port plug, in conjunction with a dormant failure/leakage of the safety valve manometric capsule, which did not allow sufficient airflow to compensate for the rate of leakage, resulting in the opening of the safety valve and possible loss of cabin pressure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Revise the maintenance schedule, clean safety valves, remove material from the area surrounding the safety valves, and modify safety valves with a gridless cabin pressure-sensing port plug. Conduct a detailed visual inspection of safety valves and surrounding areas for discrepant material and contamination in safety valve pressure ports. If contamination is found, inspect for RTV on pressure sensing port conduits. Remove discrepant materials, clean valve surfaces, and secure insulation as applicable. If RTV is detected, clean surfaces and install a new safety valve as applicable.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 12 months of the effective date (May 5, 2011)
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bombardier, Inc. Model BD-100-1A10 (Challenger 300) airplanes, serial numbers 20001 through 20274 inclusive, certificated in any category.
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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.