AD 2011-05-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440) Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440) Airplanes |
Unsafe Condition
Numerous reported failures of the Regional Jet engine TCGB (P/Ns: 2100140-003, 2100140-005, 2100140-007) have occurred, some resulting in in-flight engine shutdowns. Post-incident investigations revealed that excessive wear within the engine TCGB could alter the rigging position or cause the throttle to jam, potentially leading to engine flame-out.
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Required Actions
Inspect the throttle control gearbox (TCGB) as per Bombardier Service Bulletin 601R-76-019, Revision D, dated September 23, 2010. Replace the TCGB with a serviceable unit if required. Incorporate new CMR Task C76-11-127-01 into the Bombardier CL-600-2B19 Maintenance Requirements Manual (MRM) as introduced by Bombardier Temporary Revision 2A-47 or 2A-53.
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Compliance Time
Before further flight
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Affected Aircraft
Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes with throttle control gearboxes (TCGB) P/Ns: 2100140-003, 2100140-005, and 2100140-007.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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