Accidents
AD NPRM on CF34-3 Engine a Result of Hop-A-Jet Crash
Rule would require tests and maintenance actions following hung starts
GE CF34-3 engine
GE CF34-3 engine

The FAA has published a notice of proposed rulemaking (NPRM) for an airworthiness directive (AD) that would mandate tests and maintenance after hung starts for 1,152 CF34-1A, -3A/3A1/3A2, and -3B engines on U.S.-registered Bombardier Challenger 601s, 604s, 605s, and 650s. The AD is a result of the crash of a Hop-A-Jet Bombardier Challenger 604 on Feb. 9, 2024 ater a dual engine failure, and comments on the AD are due by June 15, 2026.

“The FAA is issuing this NPRM after determining that the unsafe condition described previously is likely to exist or develop on other products of the same type design,” according to the agency.