AD 98-21-20
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | 1900 | Airworthiness Directives; Raytheon Aircraft Company Models 1900, 1900C, and 1900D Airplanes |
| aircraft | Textron Aviation Inc. | 1900C | Airworthiness Directives; Raytheon Aircraft Company Models 1900, 1900C, and 1900D Airplanes |
| aircraft | Textron Aviation Inc. | 1900C (C-12J) | Airworthiness Directives; Raytheon Aircraft Company Models 1900, 1900C, and 1900D Airplanes |
| aircraft | Textron Aviation Inc. | 1900D | Airworthiness Directives; Raytheon Aircraft Company Models 1900, 1900C, and 1900D Airplanes |
Unsafe Condition
Placards required by AD 97-04-02 are covering the atmospheric vents for the cabin door differential pressure lock, which could cause improper operation of the lock and obscure operating instructions for doors and exits.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Modify existing exterior placards with door operating instructions installed under AD 97-04-02; or remove existing placards and install new ones with operating instructions for airstair door, cargo door, and emergency exits. Compliance can also be achieved by installing placards per Raytheon Service Bulletin 2741 then modifying them per Beechcraft message 52-0506.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 200 hours time-in-service (TIS) after the effective date of this AD, unless already accomplished
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Raytheon Aircraft Company Models 1900 (UA-2, UA-3), 1900C (UB-1-UB-74, UC-1-UC-174), 1900C (C-12J) (UD-1-UD-6), and 1900D (UE-1-UE-268)
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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