AD 99-18-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Short Brothers PLC | SD3-30 | Airworthiness Directives; Short Brothers Model SD3-SHERPA, SD3-60 SHERPA, SD3-30, and SD3-60 Series Airplanes |
| aircraft | Short Brothers PLC | SD3-60 | Airworthiness Directives; Short Brothers Model SD3-SHERPA, SD3-60 SHERPA, SD3-30, and SD3-60 Series Airplanes |
| aircraft | Short Brothers PLC | SD3-60 SHERPA | Airworthiness Directives; Short Brothers Model SD3-SHERPA, SD3-60 SHERPA, SD3-30, and SD3-60 Series Airplanes |
| aircraft | Short Brothers PLC | SD3-SHERPA | Airworthiness Directives; Short Brothers Model SD3-SHERPA, SD3-60 SHERPA, SD3-30, and SD3-60 Series Airplanes |
Unsafe Condition
Bolts coming loose on the elevator control torque tube bearing housing retaining plate, which could cause reduced movement of the elevator controls and consequent reduced controllability of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace existing bolts securing the elevator control torque tube bearing housing retaining plate with hex head bolts torqued to 35 lb-in. Compliance must be done in accordance with specified Shorts Service Bulletins.
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Compliance Time
Within 6 months after the effective date of this AD (October 6, 1999).
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Affected Aircraft
Short Brothers Model SD3-SHERPA, SD3-60 SHERPA, SD3-30, and SD3-60 series airplanes, certificated in any category.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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