AD 2011-25-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; BRP-Powertrain GmbH & Co. KG Reciprocating Engines |
| engine | Rotax | 912 F2 | Airworthiness Directives; BRP-Powertrain GmbH & Co. KG Reciprocating Engines |
Unsafe Condition
A deviation in the manufacturing process of certain part number (P/N) 888164 crankshafts may have resulted in a latent defect, leading to crack formation on the power takeoff side of the crankshaft journal, possibly resulting in failure of the crankshaft support bearing, in-flight engine shutdown, and forced landing.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the crankshafts for cracks on the power takeoff side of the crankshaft journal. Replace any crankshafts found to have cracks or that do not meet the specified standards. Follow the procedures outlined in BRP-Powertrain GmbH & Co. KG Mandatory Alert Service Bulletins ASB-912-059 and ASB 914-042.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 4 operating hours
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
BRP-Powertrain GmbH & Co. KG Rotax 912 F2, 912 F3, 912 F4, 912 S2, 912 S3, 912 S4, 914 F2, 914 F3, and 914 F4 reciprocating engines with part number (P/N) 888164 crankshafts installed.
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.