AD 71-24-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | FH1100 Manufacturing Corporation | 1100 | Airworthiness Directives; Fairchild Hiller Models 1100 and FH-1100 Helicopters |
| aircraft | FH1100 Manufacturing Corporation | FH-1100 | Airworthiness Directives; Fairchild Hiller Models 1100 and FH-1100 Helicopters |
Unsafe Condition
Fatigue failure of the transmission mount strut, P/N 24-28031, due to internal corrosion.
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Required Actions
Replace P/N 24-28031 left side, lateral, adjustable transmission strut with P/N 24-28031-11 strut in accordance with Section 28 of the FH-1100 Service Manual or an alternate method approved by the FAA. Apply RTV-102 sealant or equivalent to the threads of MS-21252 fork fitting and under AN316-5R retaining nut upon installation.
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Compliance Time
within the next 30 days after the effective date of this AD
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Affected Aircraft
Fairchild Hiller Models 1100 and FH-1100 Helicopters certificated in all categories.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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