Gulfstream Owners Fix Tail Wiring from Pesky Water Leaks
Published Date: 5/8/2026
Rule
Summary
If you own or operate a Gulfstream G280 airplane, listen up! The FAA found water sneaking into some electrical parts near the tail, causing warning messages that could affect flight controls. Starting June 12, 2026, you’ll need to upgrade the tail’s electrical wiring to keep things safe—expect some time and cost to get this done.
Analyzed Economic Effects
3 provisions identified: 1 benefits, 2 costs, 0 mixed.
Mandatory G280 tail-wiring retrofit
If you own or operate a Gulfstream G280 airplane, you must retrofit the flight controls empennage electrical harness by following CAAI AD ISR I-27-2025-03-06 R1 (replace backshells of electrical connectors at the vertical tail compartment). This AD is effective June 12, 2026 and compliance is required within the times specified in that referenced CAAI AD.
Estimated $10,000 per-plane compliance cost
The FAA estimates the retrofit will take 80 work-hours at $85/hour ($6,800) plus $3,200 in parts, for a total estimated cost of $10,000 per airplane. The FAA estimates this AD affects 140 U.S.-registered Gulfstream G280 airplanes, with a total cost on U.S. operators of $1,400,000; the manufacturer says some or all costs may be covered under warranty.
Water in connectors can risk loss of control
The FAA found water accumulating in electrical connectors under the tail, which caused empennage flight-control crew alerting messages. The unsafe condition, if not fixed, could, in combination with other failures or scenarios, result in loss of controllability of the airplane.
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