AD 74-18-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | A100 | Airworthiness Directives; BEECH Model A100 Airplanes |
| aircraft | Textron Aviation Inc. | A100-1 (U-21J) | Airworthiness Directives; BEECH Model A100 Airplanes |
| aircraft | Textron Aviation Inc. | A100A | Airworthiness Directives; BEECH Model A100 Airplanes |
| aircraft | Textron Aviation Inc. | A100C | Airworthiness Directives; BEECH Model A100 Airplanes |
Unsafe Condition
Fuel transfer sump drain line tube assemblies may contact the reverse current diode heat sink, causing potential fuel leakage and electrical system damage.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Visually inspect for minimum one-half inch separation between fuel transfer sump drain line tube assemblies and reverse current diode heat sink. Hand form and temporarily support with clamps/brackets as needed. Replace existing tube assemblies with new ones (P/N 100-920001-205 LH and P/N 100-920001-206 RH) within 200 hours' time-in-service after AD effective date.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Prior to further flight and within 200 hours' time-in-service after the effective date of this AD
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Affected Aircraft
BEECH Model A100 airplanes with serial numbers B-90 through B-92, B-94 through B-102, B-104, B-105, B-107 through B-109, B-111, B-115, B-116, B-118, B-119, and B-121 through B-204, except those equipped with the optional 300 ampere generator system.
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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