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Airworthiness Directive

AD 2025-07-02 90 FR 14719 Superseded

Federal Aviation Administration · 14 CFR part 39

Requires repetitive operational checks of the battery backup function with removal of the engine from service if insufficient battery power is found, one-time inspections of the oil spray nozzle and generator stator assembly…

Superseded by AD 2025-15-03Federal Register (opens in a new tab)FAA DRS (opens in a new tab)

FR document
2025-05852
Amendment
39-23003
Published
2025-04-04
Effective
2025-04-21
Models covered
2

Last live check: 2026-08-19

Printed from https://aircraftdirectives.com/ad/2025-07-02 · AircraftDirectives restates official FAA and manufacturer records; the official sources named on this sheet control. Not an airworthiness determination.

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AD

2025-07-02

FR doc 2025-05852 · 90 FR 14719

AD 2025-07-02Published 2025-04-04Effective 2025-04-21

Superseded by 2025-15-03

Supersedence is read from the Federal Register text of the newer AD — the FAA publishes no structured field for it — and names only ADs held in our index.

FAA rule - 14 CFR 39

FAA rule. Compliance with an applicable AD is required under 14 CFR 39.7. Check its effective date, applicability, compliance times and current status.

Requires repetitive operational checks of the battery backup function with removal of the engine from service if insufficient battery power is found, one-time inspections of the oil spray nozzle and generator stator assembly, and, depending on the results of the inspections, replacement with parts eligible for installation.

Full official abstract

The FAA is adopting a new airworthiness directive (AD) for certain BRP-Rotax GmbH & Co KG (Rotax) Model 912 iSc2 Sport, 912 iSc3 Sport, 915 iSc2 C24, and 915 iSc3 C24 engines. This AD was prompted by a report of deviations during the manufacturing process that caused incorrect application of a certain thread-locker to certain sprag clutch housing and oil spray nozzles. This AD requires repetitive operational checks of the battery backup function with removal of the engine from service if insufficient battery power is found, one-time inspections of the oil spray nozzle and generator stator assembly, and, depending on the results of the inspections, replacement with parts eligible for installation. The FAA is issuing this AD to address the unsafe condition on these products.

More directives for Rotax 912

  1. AD 2026-16-11 Airworthiness Directives; BRP-Rotax GmbH & Co KG (Formerly BRP-Powertrai... Effective 2026-08-28
  2. AD 2025-15-03 Airworthiness Directives; BRP-Rotax GmbH & Co KG (Formerly BRP-POWERTRAI... Effective 2025-08-06
  3. AD 2023-17-13 Airworthiness Directives; BRP-Rotax GmbH & Co KG (Formerly BRP-POWERTRAI... Effective 2023-09-20
  4. AD 2019-21-12 Airworthiness Directives; BRP-Rotax GmbH & Co KG Engines Effective 2019-11-19
  5. AD 2019-10-04 Airworthiness Directives; BRP-Rotax GmbH & Co KG Engines Effective 2019-07-10

All Rotax 912 directives

View on Federal Register (opens in a new tab) View this AD in FAA DRS (opens in a new tab) Print AD packet (opens the full Federal Register document in a new tab)

Applies to 2 models in our index