EASA AD US-2019-16-02: Engine Fuel Control - Fuel Pump Metering Unit - Replacement

What to do

Operators must remove the affected FPMU assembly within 20 engine hours after the AD's effective date or before accumulating 600 engine hours since new, whichever is later, and replace it with an approved part. After the effective date, installation of the affected FPMU assembly is prohibited. Maintenance and compliance teams should reference GHAE HF120 Service Bulletin 73-0016 Revision 02 dated May 13, 2019, for replacement procedures.

Summary

The Federal Register Volume 84, Number 154 (August 9, 2019) final rule titled "Engine Fuel Control - Fuel Pump Metering Unit - Replacement" is an Airworthiness Directive issued by the FAA for all GE Honda Aero Engines HF120 model turbofan engines equipped with fuel pump metering unit (FPMU) assembly part number 24100-Q0A-F000. This directive addresses damage found on the permanent magnetic alternator drive gear within the FPMU assembly that could lead to engine failure. The AD mandates replacement of the affected FPMU assembly with approved parts to ensure continued airworthiness and safety.

What changed

This new Airworthiness Directive requires removal of the affected FPMU assembly, P/N 24100-Q0A-F000, and replacement with a part eligible for installation, specifically P/N 24100-Q0A-G000 or P/N 24100-Q0A-F100, or a rebuilt and properly marked version of the original part. It also prohibits installation of the affected FPMU assembly after the effective date. The AD updates related service information and revises the JASC code and contact address based on comments received during the rulemaking process.

Why it matters

This AD is critical for aviation professionals because it prevents potential failure of the FPMU assembly, which could cause loss of thrust control and engine failure, posing significant safety risks. Operators and maintenance organizations must ensure compliance to avoid unsafe conditions and maintain regulatory adherence. The directive also clarifies part eligibility and installation prohibitions, aiding maintenance planning and parts management.