AD 78-13-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna Aircraft Company | 340 | Airworthiness Directives; CESSNA Models 340, 340A, 402B, 404, 414, 414A, 421, 421A, 421B and 421C Airplanes |
| aircraft | Cessna Aircraft Company | 340A | Airworthiness Directives; CESSNA Models 340, 340A, 402B, 404, 414, 414A, 421, 421A, 421B and 421C Airplanes |
| aircraft | Cessna Aircraft Company | 402B | Airworthiness Directives; CESSNA Models 340, 340A, 402B, 404, 414, 414A, 421, 421A, 421B and 421C Airplanes |
| aircraft | Cessna Aircraft Company | 404 | Airworthiness Directives; CESSNA Models 340, 340A, 402B, 404, 414, 414A, 421, 421A, 421B and 421C Airplanes |
| aircraft | Cessna Aircraft Company | 414 | Airworthiness Directives; CESSNA Models 340, 340A, 402B, 404, 414, 414A, 421, 421A, 421B and 421C Airplanes |
| aircraft | Cessna Aircraft Company | 414A | Airworthiness Directives; CESSNA Models 340, 340A, 402B, 404, 414, 414A, 421, 421A, 421B and 421C Airplanes |
| aircraft | Cessna Aircraft Company | 421 | Airworthiness Directives; CESSNA Models 340, 340A, 402B, 404, 414, 414A, 421, 421A, 421B and 421C Airplanes |
| aircraft | Cessna Aircraft Company | 421A | Airworthiness Directives; CESSNA Models 340, 340A, 402B, 404, 414, 414A, 421, 421A, 421B and 421C Airplanes |
| aircraft | Cessna Aircraft Company | 421B | Airworthiness Directives; CESSNA Models 340, 340A, 402B, 404, 414, 414A, 421, 421A, 421B and 421C Airplanes |
| aircraft | Cessna Aircraft Company | 421C | Airworthiness Directives; CESSNA Models 340, 340A, 402B, 404, 414, 414A, 421, 421A, 421B and 421C Airplanes |
Unsafe Condition
Seats with seat-to-seat track fittings improperly installed and seats installed facing the wrong direction, which could result in seat failure in situations where the seats and seat belts are relied on to restrain the passengers.
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Required Actions
Visually inspect all affected passenger seats for correct installation in the airplane and for proper assembly and correct any discrepancies prior to the next flight, in accordance with Cessna Multi-Engine Service Letter ME78-17. Equivalent methods must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region.
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Compliance Time
within 25 hours time-in-service after the effective date of this AD
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Affected Aircraft
Cessna Models 340 (340-0001 and up), 340A (340A0001 through 340A0472), 402B (402B0301 through 402B1332), 404 (404-0001 through 404-0223), 414 (414-0251 and up), 414A (414A0001 through 414A0042), 421 (421-0001 and up), 421A (421A0001 and up), 421B (421B0001 and up), and 421C (421C0001 through 421C0478)
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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