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.
Federal Register Abstract
Improperly Installed Seats
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_78-13-05.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 78-13-05 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; CESSNA Models 340, 340A, 402B, 404, 414, 414A, 421, 421A, 421B and 421C Airplanes Subject: Improperly Installed Seats Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 07/05/1978 Make: Cessna Aircraft Company Model: 340 | 340A | 402B | 404 | 414 | 414A | 421 | 421A | 421B | 421C Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 78-13-05 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3250 AD NUMBER: 78-13-05 SUBJECT HEADING: Airworthiness Directives; CESSNA Models 340, 340A, 402B, 404, 414, 414A, 421, 421A, 421B and 421C Airplanes ACTION: SUMMARY: DATES: Effective July 5, 1978. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 78-13-05 CESSNA: Amendment 39-3250. Applies to the following models and serial number airplanes certificated in all categories: MODEL SERIAL NUMBERS 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 421C 421C0001 through 421C0478 COMPLIANCE: Required as indicated unless already accomplished. To detect seats with seat-to-seat track fittings improperly installed and seats installed facing the wrong direction, which if allowed to go uncorrected, could result in seat failure in those situations where the seats and seat belts are relied on to restrain the passengers, within 25 hours time-in-service after the effective date of this AD accomplish the following: A) 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, all in accordance with Cessna Multi-Engine Service Letter ME78-17, dated May 15, 1978, or later revisions. B) Any equivalent method of compliance with this AD must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region. This amendment becomes effective on July 5, 1978. FOOTER:
Document Text
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AD Final Rules - DRS_78-13-05.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 78-13-05 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; CESSNA Models 340, 340A, 402B, 404, 414, 414A, 421, 421A, 421B and 421C Airplanes Subject: Improperly Installed Seats Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 07/05/1978 Make: Cessna Aircraft Company Model: 340 | 340A | 402B | 404 | 414 | 414A | 421 | 421A | 421B | 421C Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 78-13-05 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3250 AD NUMBER: 78-13-05 SUBJECT HEADING: Airworthiness Directives; CESSNA Models 340, 340A, 402B, 404, 414, 414A, 421, 421A, 421B and 421C Airplanes ACTION: SUMMARY: DATES: Effective July 5, 1978. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 78-13-05 CESSNA: Amendment 39-3250. Applies to the following models and serial number airplanes certificated in all categories: MODEL SERIAL NUMBERS 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 421C 421C0001 through 421C0478 COMPLIANCE: Required as indicated unless already accomplished. To detect seats with seat-to-seat track fittings improperly installed and seats installed facing the wrong direction, which if allowed to go uncorrected, could result in seat failure in those situations where the seats and seat belts are relied on to restrain the passengers, within 25 hours time-in-service after the effective date of this AD accomplish the following: A) 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, all in accordance with Cessna Multi-Engine Service Letter ME78-17, dated May 15, 1978, or later revisions. B) Any equivalent method of compliance with this AD must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region. This amendment becomes effective on July 5, 1978. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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