AD 78-01-09 R2
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Short Brothers PLC | SD3-30 | Airworthiness Directives; SHORT BROTHERS LIMITED Model SD3-30 Airplanes |
Unsafe Condition
Inability to inflate de-icing boots of pneumatic deicing system on the empennage caused by water freezing in system plumbing.
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Required Actions
Manually drain water from the pneumatic deicing system plumbing before each flight in known icing conditions, following Short Brothers, Ltd. Alert Service Bulletin SD3-30-A04, Revision 1. Place a placard in the cockpit stating daily drainage requirement. Compliance may be terminated by installing automatic water drainage per Modification Service Bulletin SD3-30-04, Revision 2.
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Compliance Time
Prior to each flight in which the airplane may be subject to known icing conditions
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Affected Aircraft
Model SD3-30 airplanes, Serial Numbers SH 3002, SH 3004 through SH 3007, inclusive, and SH 3009 through SH 3011, inclusive, 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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