AD 2006-10-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier Model CL-600-2B19 (Regional Jet Series 100 and 440) Airplanes |
Unsafe Condition
Defective Leach TDH-series electrical relays affecting emergency equipment, including the passenger oxygen system, thrust reverse control system, and auxiliary power unit fire detection, warning, and extinguishing system.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the manufacturer's date code on specified electrical relays (K4WQ, K5WQ, K3QA, K4QA, K4WG, K1CN, K2CN) to identify defective relays. Replace any identified defective relays with serviceable ones prior to further flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 5,500 flight hours or 36 months after the effective date of the AD, whichever is first.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bombardier Model CL-600-2B19 (Regional Jet Series 100 and 440) airplanes, serial numbers 7003 and subsequent.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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