Maintenance and Modifications
ExecuJet Replaces Challenger 604 Gearbox in South Africa
Work was required under a service bulletin issued by engine manufacturer GE Aerospace
ExecuJet MRO Services South Africa in Johannesburg
ExecuJet MRO Services South Africa in Johannesburg is an authorized service center for GE’s CF34-3B1 engine.

ExecuJet MRO Services South Africa has completed its first replacement of an engine accessory gearbox (AGB) on a Bombardier Challenger 604. The work was conducted to fulfill the requirements of a service bulletin issued by GE Aerospace, maker of the twinjet’s CF34-3B1 engines.

The facility in Johannesburg replaced the AGB on a Nigerian-registered Challenger while it was undergoing a 96-month scheduled aircraft maintenance check. Conducted on-wing to reduce downtime, the work started with a borescope procedure to confirm that the AGB needed to be replaced.