Airworthiness Directives; Textron Aviation, Inc. (Type Certificate Previously Held by Cessna Aircraft Company) Airplanes
Published Date: 2/6/2026
Rule
Summary
If you own a Textron Aviation Model 525B airplane, listen up! The FAA says you need to update your maintenance manual with stricter inspection rules to catch potential engine mount cracks early. This change kicks in on March 13, 2026, so get ready to keep your plane safe and sound without breaking the bank.
Analyzed Economic Effects
2 provisions identified: 0 benefits, 1 costs, 1 mixed.
Revised Inspection Intervals for Engine and Stabilizer
The AD updates inspection intervals for specific engine mount and vertical stabilizer spar-cap tasks. For example, task 54-50-00-250 (Forward Engine Mount Channel Flange) is revised to inspections at 6,100 hours TIS then 4,100 hours TIS thereafter; task 54-50-00-252 (Aft Engine Beam Aft Upper Angle) to 14,100 hours TIS then every 2,700 hours TIS; task 54-50-00-254 to 16,300 hours TIS then every 11,600 hours TIS; task 54-50-00-255 to 15,600 hours TIS then every 11,100 hours TIS; task 55-40-00-250 to 9,000 hours TIS then every 7,000 hours TIS; task 55-40-00-251 to 17,700 hours TIS then every 14,900 hours TIS; and task 55-40-00-252 to 23,600 hours TIS then every 12,100 hours TIS.
Must Revise Maintenance Manual Quickly
If you own or operate a Textron Model 525B airplane, you must revise the Airworthiness Limitations Section (ALS) of the aircraft maintenance manual (AMM) and your approved maintenance/inspection program within 150 hours time-in-service (TIS) or 12 months after March 13, 2026, whichever is first. The FAA estimates this paperwork change costs 1 work-hour ($85) per airplane and affects 601 U.S.-registered Model 525B airplanes (total estimated cost $51,085).
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