Airworthiness Directive · Amendment 39-22539 · Reciprocating engine front section
BRP-Rotax GmbH & Co KG (Formerly BRP-POWERTRAIN GMBH & CO KG and Bombardier-Rotax GmbH) Engines and Various Aircraft
This AD applies to BRP-Rotax GmbH & Co KG (formerly BRP-POWERTRAIN GMBH & CO KG and Bombardier-Rotax GmbH) (Rotax) Model 912 F2, 912 F3, 912 F4, 912 iSc2 Sport, 912 iSc3 Sport, 912 S2, 912 S3, 912 S4, 914 F2, 914 F3, and 914 F4 engines; and Model 912 A, 912 A2, and 912 A3 engines installed on the aircraft identified in Table 1 to paragraph (c) of this AD that were included as part of the aircraft's type certification basis; with a propeller shaft having part number (P/N) 937047 and meeting at least one of the criteria of paragraphs (c)(1) or (2) of this AD.
| Type certificate holder | Aircraft model | Engine model |
|---|---|---|
| Aeromot-Industria Mecanico-Metalurgica Ltda | AMT-200 (Super Ximango) | 912 A2. |
| Diamond Aircraft Industries | HK 36 R “SUPER DIMONA” | 912 A. |
| Diamond Aircraft Industries GmbH | HK 36 TC & HK 36 TS | 912 A3. |
| Diamond Aircraft Industries Inc. | DA20-A1 | 912 A3. |
| HOAC-Austria | DV 20 KATANA | 912 A3. |
| Magnaghi Aeronautica S.p.A | Sky Arrow 650 TC | 912 A2. |
| SCHEIBE-AIRCRAFT-GMBH | SF 25C | 912 A2 or 912 A3. |
(1) Installed initially (on delivery) on engines having a serial number identified in paragraph 1.1) Applicability, Criterion A) Engine Serial number, of Rotax Service Bulletin (SB) SB-912-078/SB-914-059/SB-912 i-014, dated July 25, 2023 (published as a single document) (Rotax SB SB-912-078/SB-914-059/SB-912 i-014); or paragraph 1.1) Applicability, Criterion A) Engine Serial number, of Rotax SB SB-912-078UL/SB-914-059UL/SB-912 i-014iS, dated July 25, 2023 (published as a single document) (SB-912-078UL/SB-914-059UL/SB-912 i-014iS); or
(2) Delivered as a spare part and having a serial number identified in paragraph 1.1) Applicability, Criterion B) Spare parts, of Rotax SB SB-912-078/SB-914-059/SB-912 i-014; or paragraph 1.1) Applicability, Criterion B) Spare parts, of Rotax SB SB-912-078UL/SB-914-059UL/SB-912 i-014iS.
The FAA is adopting a new airworthiness directive (AD) for all BRP-Rotax GmbH & Co KG (Rotax) Model 912 F2, 912 F3, 912 F4, 912 iSc2 Sport, 912 iSc3 Sport, 912 S2, 912 S3, 912 S4, 914 F2, 914 F3, and 914 F4 engines; and Model 912 A, 912 A2, and 912 A3 engines included as part of the type certificated aircraft type design for various aircraft. This AD was prompted by a report of surface abnormalities on the affected propeller shaft, which could lead to increased wear of the propeller shaft bearings. This AD requires initial and repetitive inspections of the magnetic plug for the accumulation of metal chips to assess the condition of the propeller gearbox for wear of the propeller shaft bearings and removal of the affected propeller shaft from service and replacement with a part eligible for installation as a terminating action either immediately or at a certain time depending on inspection findings. This AD also prohibits installation of the affected propeller shaft on any engine. The FAA is issuing this AD to address the unsafe condition on these products.
(1) Before further flight after the effective date of this AD and thereafter at intervals not to exceed 10 flight hours (FHs), inspect the magnetic plug on the crankcase for the accumulation of metal chips. If the accumulation of metal chips is 3mm or greater, before further flight, remove the affected propeller shaft from service and replace with a part eligible for installation.
(2) Before exceeding 50 FHs since engine first operation or since first installation of the affected propeller shaft on an engine, as applicable; or within 10 days after the effective date of this AD, whichever occurs later; remove the affected propeller shaft from service and replace with a part eligible for installation.
(3) Replacement of the affected propeller shaft with a part eligible for installation constitutes terminating action for any inspection required by paragraph (g)(1) of this AD.
After the effective date of this AD, do not install a propeller shaft having P/N 937047 on any engine.
Where Rotax SB SB-912-078/SB-914-059/SB-912 i-014 specifies returning certain parts to the manufacturer, this AD does not include that requirement.
For the purpose of this AD, a “part eligible for installation” is any propeller shaft that does not have P/N 937047.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
