AD 2004-23-15
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | MD | Various | Airworthiness Directives; MD Helicopters, Inc. Model MD900 Helicopters |
Unsafe Condition
Failure of a Notar fan system tension-torsion (TT) strap resulting in loss of directional control and subsequent loss of control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Reduce the life limit of certain TT straps from 3034 to 2500 hours time-in-service (TIS). Inspect each TT strap visually and by x-ray within 10 hours TIS if it has accumulated 1190 or more hours TIS, or before accumulating 1200 hours TIS if it has less than 1190 hours TIS. Replace any unairworthy part before further flight. Report discovery of any unairworthy TT strap within 7 days.
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Compliance Time
Within 10 hours TIS for inspection and replacement, and within 7 days for reporting unairworthy parts.
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Affected Aircraft
MD Helicopters, Inc. Model MD900 helicopters with TT straps part numbers 900R3442009-103, 900R6442009-103, 900R3442009-101, or 500N5311-5 installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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