AD 72-21-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aerotek II, Inc. | B-1 | Airworthiness Directives; Aero Commander Models B-1 and B-1A Series Airplanes |
| aircraft | Aerotek II, Inc. | B-1A | Airworthiness Directives; Aero Commander Models B-1 and B-1A Series Airplanes |
Unsafe Condition
Failures of the landing gear shock struts, specifically P/N 18004-1 and P/N 18004-2, which could lead to loss of structural integrity.
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Required Actions
Remove and discard main landing gear shock struts P/N 18004-1/-2 along with all hardware except wire cutters P/N 18026. Install replacement struts P/N 18045-1/-2 with specified hardware including NAS 1306 bolts, AN 960 washers, and AN 365 nuts. Replace wire cutters with AN 3-6A bolts, AN 960-10 washers, and AN 365-1032 nuts on both struts.
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Compliance Time
within the next 100 hours' time in service after the effective date of this AD
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Affected Aircraft
Aerotek II, Inc. Models B-1 and B-1A series airplanes, serial numbers 10,000 through 10,035
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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