AD 98-19-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron Canada Limited | 407 | Airworthiness Directives; Bell Helicopter Textron Canada (BHTC) Model 407 Helicopters |
Unsafe Condition
Failure of the engine-to-transmission driveshaft (part number 206-340-300-103) could result in loss of engine drive to the rotor system, damage to critical structural components, and subsequent loss of control of the helicopter due to its life limit being less than the stated 2,500 hours total time-in-service (TIS).
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the driveshaft, part number 206-340-300-103, with an airworthy driveshaft, part number 206-340-300-105, prior to or upon accumulating 50 hours total time-in-service (TIS). Establish a component record card for the new driveshaft and revise the Airworthiness Limitations section of the maintenance manual to set a retirement life of 5,000 hours TIS for the new part number.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Required prior to or upon accumulating 50 hours total time-in-service (TIS) on driveshaft, P/N 206-340-300-103.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bell Helicopter Textron Canada Limited Model 407 helicopters with engine-to-transmission driveshaft, part number 206-340-300-103, installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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