FAA Orders Disconnect of Faulty Recorder on Bombardier Jets
Published Date: 11/18/2025
Rule
Summary
If you fly a Bombardier CL-600-2B16 (604 Variant), listen up! The FAA found that a flap system recorder can mess with the flap controls, causing warning messages or unexpected flap moves. Starting December 23, 2025, you must disconnect this recorder and never install it again to keep flights safe—no big costs, just peace of mind.
Analyzed Economic Effects
2 provisions identified: 1 benefits, 1 costs, 0 mixed.
Mandatory FSOBR Disconnect and Ban
If you operate or fly on a Bombardier CL-600-2B16 (604 Variant), the FAA requires disconnecting the flap system on-board recorder (FSOBR) and bans reinstalling it. As of December 23, 2025, no person may reconnect or install FSOBR unit part number 604-70201-1 or FSOBR harness part number 604-57140-3 on any airplane; the AD was issued to address Flap Fail messages and possible uncommanded flap movement that could lead to loss of control.
Compliance Time and Operator Cost
For airplanes that have incorporated Bombardier Service Bulletin 604-27-035, 605-27-006, or 650-27-001 as of December 23, 2025, operators must disconnect the FSOBR within 1,000 flight hours or 14 months (whichever occurs first) after that date. The FAA estimates up to 3 work-hours at $85/hour (up to $255) per airplane to comply, affecting 442 U.S.-registered airplanes for a total estimated cost up to $112,710; the manufacturer may cover some costs under warranty.
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