AD 68-14-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | 56TC | Airworthiness Directives; BEECH Model D55, 56TC, and E95 Airplanes |
| aircraft | Textron Aviation Inc. | D55 | Airworthiness Directives; BEECH Model D55, 56TC, and E95 Airplanes |
| aircraft | Textron Aviation Inc. | E95 | Airworthiness Directives; BEECH Model D55, 56TC, and E95 Airplanes |
Unsafe Condition
Simultaneous operation of the Model B5 Autopilot and the pneumatic de-icer system might cause the airplane to exceed structural limits.
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Required Actions
Aircraft must not operate the Model B5 Autopilot and pneumatic de-icer system simultaneously. Install a placard near the autopilot controller within ten hours time in service after receiving the telegram, stating 'Autopilot must be turned OFF whenever the de-icer system is ON.' The placard must remain until Brittain SB No. 68-1, Rev A or an approved equivalent modification is accomplished.
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Compliance Time
within ten hours time in service after receipt of the telegram
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Affected Aircraft
BEECH Model D55, 56TC, and E95 airplanes equipped with Beechcraft pneumatic deicer system and Beechcraft Model B5 Autopilot (manufactured as Brittain Model B-5P)
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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