AD 68-07-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna Aircraft Company | 177 | Airworthiness Directives; CESSNA Model 177 Airplanes |
Unsafe Condition
Oscillation in the longitudinal control system
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install Cessna P/N 170094-1 in accordance with Cessna Service Letter No. SE68-13. The part may be removed if replaced by P/N 1709007-1 per SE68-14 or an approved alternative method.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 10 hours' time in service after November 16, 1968
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Cessna Model 177, Serial Numbers 177-00001 through 177-01152
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Longitudinal Control System
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_68-07-09.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 68-07-09 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; CESSNA Model 177 Airplanes Subject: Longitudinal Control System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 11/16/1968 Make: Cessna Aircraft Company Model: 177 Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 68-07-09 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-682 AD NUMBER: 68-07-09 SUBJECT HEADING: Airworthiness Directives; CESSNA Model 177 Airplanes ACTION: SUMMARY: DATES: Effective November 16, 1968. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 68-07-09 CESSNA: Amdt. 39-682. Applies to Model 177, Serial Numbers 177-00001 through 177-01152, aircraft. Compliance: Required as indicated, unless already accomplished. To prevent oscillation in the longitudinal control system, accomplish the following: (a) Within 10 hours' time in service after the effective date of this airworthiness directive, modify the flap system by the installation of Cessna P/N 170094-1, in accordance with the instructions contained in Cessna Service Letter No. SE68-13, dated March 30, 1968, or any other method approved by the Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, Central Region. (b) Cessna P/N 170094-1 referred to in paragraph (a) may be removed when Cessna P/N 1709007-1 is installed in accordance with Cessna Service Letter SE68-14, operation 23 and attachments, dated April 11, 1968, as revised April 22, 1968, or when any other modification is installed which has been approved by Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, Central Region. This amendment becomes effective November 16, 1968. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_68-07-09.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 68-07-09 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; CESSNA Model 177 Airplanes Subject: Longitudinal Control System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 11/16/1968 Make: Cessna Aircraft Company Model: 177 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: 68-07-09 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-682 AD NUMBER: 68-07-09 SUBJECT HEADING: Airworthiness Directives; CESSNA Model 177 Airplanes ACTION: SUMMARY: DATES: Effective November 16, 1968. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 68-07-09 CESSNA: Amdt. 39-682. Applies to Model 177, Serial Numbers 177-00001 through 177-01152, aircraft. Compliance: Required as indicated, unless already accomplished. To prevent oscillation in the longitudinal control system, accomplish the following: (a) Within 10 hours' time in service after the effective date of this airworthiness directive, modify the flap system by the installation of Cessna P/N 170094-1, in accordance with the instructions contained in Cessna Service Letter No. SE68-13, dated March 30, 1968, or any other method approved by the Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, Central Region. (b) Cessna P/N 170094-1 referred to in paragraph (a) may be removed when Cessna P/N 1709007-1 is installed in accordance with Cessna Service Letter SE68-14, operation 23 and attachments, dated April 11, 1968, as revised April 22, 1968, or when any other modification is installed which has been approved by Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, Central Region. This amendment becomes effective November 16, 1968. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.
Related Airworthiness Directives
2011-10-09 Recurring
final ruleAirworthiness Directives; Cessna Aircraft Company Models 150, 152, 170, 172, 175, 177, 180, 182, 185, 188, 190, 195, 206, 207, 210, T303, 336, and 337 Airplanes
Unsafe Condition: Excessive wear on seat rail and seat rail holes, seat pin engagement, seat rollers, washers, axle bolts or bushings, wall thickness of roller housing and the tang, and lock pin springs may lead to ...
2008-26-10
final ruleAirworthiness Directives; Cessna Aircraft Company 172, 175, 177, 180, 182, 185, 188, 206, 207, 208, 210, 303, 336, and 337 Series Airplanes
Unsafe Condition: Obstruction of the alternate static air source selector valve port by the part number identification placard, which could result in erroneous indications from the altimeter, airspeed, and vertical ...
2006-12-07
final ruleAirworthiness Directives; Engine Components Inc. (ECi) Reciprocating Engine Cylinder Assemblies
Unsafe Condition: Cracks in the cylinder assemblies and possible engine failure caused by separation of a cylinder head.
2005-01-19
final ruleAirworthiness Directives; GARMIN International Inc. GTX 33, GTX 33D, GTX 330, and GTX 330D Mode S Transponders
Unsafe Condition: The GTX 33/33D/330/330D Mode S transponders may detect the S1 (suppression) interrogating pulse below the minimum trigger level (MTL) and, in some circumstances, not reply. This could lead to inacc...