AD 2026-04-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; BRP-Rotax GmbH & Co KG (Formerly BRP-POWERTRAIN GMBH & CO KG and Bombardier-Rotax GmbH) Engines |
Unsafe Condition
an occurrence was reported of the M40 x 1.5 collar nut that had not been installed on the propeller gearbox of a recently manufactured engine, which could result in the propeller shaft being pulled out of the gearbox housing during operation.
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Required Actions
a visual inspection of the propeller gearbox to determine if a collar nut is installed on the propeller shaft and, if not installed, replacement of the propeller gearbox with a serviceable propeller gearbox, before further flight, accomplishing further action in accordance with a method approved by the Manager, International Validation Branch, FAA; EASA; or Rotax' EASA Design Organization Approval (DOA).
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Compliance Time
Before further flight
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Affected Aircraft
BRP-Rotax GmbH & Co KG (Formerly BRP-POWERTRAIN GMBH & CO KG and Bombardier-Rotax GmbH) Model 915 iSc2 C24 and 915 iSc3 C24 engines.
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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