AD 80-09-09
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna Aircraft Company | 500 | Airworthiness Directives; CESSNA Models 500, 501, 550 and 551 Airplanes |
| aircraft | Cessna Aircraft Company | 501 | Airworthiness Directives; CESSNA Models 500, 501, 550 and 551 Airplanes |
| aircraft | Cessna Aircraft Company | 550 | Airworthiness Directives; CESSNA Models 500, 501, 550 and 551 Airplanes |
| aircraft | Cessna Aircraft Company | 551 | Airworthiness Directives; CESSNA Models 500, 501, 550 and 551 Airplanes |
Unsafe Condition
Loss of attitude information to the crew due to insufficient power sources, distribution, or bus systems for the dual flight director installation, or improper placement of the copilot's second attitude indicator.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Insert specified operating limitations in the Airplane Flight Manual, relocate the copilot's second attitude indicator to designated panel positions, and use the insertion until replaced by FAA-approved revisions. Equivalent methods require approval from the FAA.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 100 hours time-in-service after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Cessna Models 500, 501, 550, and 551 with serial numbers as listed in the AD, equipped with Cessna-installed dual flight director indicators not modified for independent power sources or relocated indicators.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Dual Flight Director Installation
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_80-09-09.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 80-09-09 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; CESSNA Models 500, 501, 550 and 551 Airplanes Subject: Dual Flight Director Installation Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/12/1980 Make: Cessna Aircraft Company Model: 500 | 501 | 550 | 551 Product Type: Aircraft Product Subtype: Small/Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 80-09-09 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3768 AD NUMBER: 80-09-09 SUBJECT HEADING: Airworthiness Directives; CESSNA Models 500, 501, 550 and 551 Airplanes ACTION: SUMMARY: DATES: Effective May 12, 1980. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 80-09-09 CESSNA: Amendment 39-3768. Applies to the following airplanes, equipped with Cessna installed dual flight director indicators, unless modified to provide independent power sources, distribution and bus systems for the dual flight director installation or by relocating the copilot's second attitude indicator to the top center position of the copilot panel instrument "T". Model 500 Serial Numbers 500-0066 500-0303 500-0178 500-0304 500-0184 500-0342 500-0275 500-0343 500-0276 500-0344 500-0278 500-0346 500-0279 500-0359 500-0292 500-0364 500-0293 500-0371 500-0294 500-0370 500-0299 500-0373 500-0300 500-0379 Model 501 Serial Numbers 501-0016 501-0063 501-0024 501-0066 501-0027 501-0067 501-0034 501-0112 501-0052 501-0121 Model 550 Serial Numbers 550-0005 550-0079 550-0010 550-0091 550-0012 550-0095 550-0025 550-0098 550-0032 550-0100 550-0034 550-0106 550-0038 550-0110 550-0044 550-0114 550-0046 550-0116 550-0047 550-0121 550-0056 550-0124 550-0062 550-0126 550-0063 550-0130 550-0064 550-0134 550-0066 550-0136 550-0067 550-0138 550-0069 550-0141 550-0073 550-0152 550-0076 Model 551 Serial Numbers 551-0016 551-0024 551-0061 COMPLIANCE: Required as indicated, unless previously accomplished. To preclude the loss of attitude information to the crew, within the next 100 hours time-in-service after the effective date of this AD, accomplish the following: A) Insert the following information in the applicable FAA Approved Airplane Flight Manual, Section II, Operating Limitations, under the heading Dual Flight Director Installation and operate the airplane in accordance with this insertion: "The copilot's second attitude indicating system must be installed, operational, and remain operating throughout the flight for those airplanes equipped with the Dual Flight Director Installation." B) Relocate the copilot's second attitude indicator from the center instrument panel or right side instrument panel if applicable to one of the following positions on the copilot instrument panel. 1) Two instrument positions below the copilot airspeed indicator, or 2) One instrument position below the copilot's altimeter, or 3) Two instrument positions below the copilot's altimeter. C) Use Paragraph A of this AD or a duplicate thereof, as an amendment to the FAA Approved Airplane Flight Manual until replaced by the following applicable FAA Approved Cessna revision: Model Revision No. FAA Approved Date 500 43 April 15, 1980 501 13 April 18, 1980 550 13 April 15, 1980 551 10 April 18, 1980 D) Any equivalent method of compliance with this Airworthiness Directive must be approved by the Chief, Wichita Engineering and Manufacturing District Office, Federal Aviation Administration, Room 238, Terminal Building No. 2299, Mid-Continent Airport, Wichita, Kansas 67209. This amendment becomes effective May 12, 1980. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_80-09-09.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 80-09-09 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; CESSNA Models 500, 501, 550 and 551 Airplanes Subject: Dual Flight Director Installation Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/12/1980 Make: Cessna Aircraft Company Model: 500 | 501 | 550 | 551 Product Type: Aircraft Product Subtype: Small/Large 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: 80-09-09 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3768 AD NUMBER: 80-09-09 SUBJECT HEADING: Airworthiness Directives; CESSNA Models 500, 501, 550 and 551 Airplanes ACTION: SUMMARY: DATES: Effective May 12, 1980. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 80-09-09 CESSNA: Amendment 39-3768. Applies to the following airplanes, equipped with Cessna installed dual flight director indicators, unless modified to provide independent power sources, distribution and bus systems for the dual flight director installation or by relocating the copilot's second attitude indicator to the top center position of the copilot panel instrument "T". Model 500 Serial Numbers 500-0066 500-0303 500-0178 500-0304 500-0184 500-0342 500-0275 500-0343 500-0276 500-0344 500-0278 500-0346 500-0279 500-0359 500-0292 500-0364 500-0293 500-0371 500-0294 500-0370 500-0299 500-0373 500-0300 500-0379 Model 501 Serial Numbers 501-0016 501-0063 501-0024 501-0066 501-0027 501-0067 501-0034 501-0112 501-0052 501-0121 Model 550 Serial Numbers 550-0005 550-0079 550-0010 550-0091 550-0012 550-0095 550-0025 550-0098 550-0032 550-0100 550-0034 550-0106 550-0038 550-0110 550-0044 550-0114 550-0046 550-0116 550-0047 550-0121 550-0056 550-0124 550-0062 550-0126 550-0063 550-0130 550-0064 550-0134 550-0066 550-0136 550-0067 550-0138 550-0069 550-0141 550-0073 550-0152 550-0076 Model 551 Serial Numbers 551-0016 551-0024 551-0061 COMPLIANCE: Required as indicated, unless previously accomplished. To preclude the loss of attitude information to the crew, within the next 100 hours time-in-service after the effective date of this AD, accomplish the following: A) Insert the following information in the applicable FAA Approved Airplane Flight Manual, Section II, Operating Limitations, under the heading Dual Flight Director Installation and operate the airplane in accordance with this insertion: "The copilot's second attitude indicating system must be installed, operational, and remain operating throughout the flight for those airplanes equipped with the Dual Flight Director Installation." B) Relocate the copilot's second attitude indicator from the center instrument panel or right side instrument panel if applicable to one of the following positions on the copilot instrument panel. 1) Two instrument positions below the copilot airspeed indicator, or 2) One instrument position below the copilot's altimeter, or 3) Two instrument positions below the copilot's altimeter. C) Use Paragraph A of this AD or a duplicate thereof, as an amendment to the FAA Approved Airplane Flight Manual until replaced by the following applicable FAA Approved Cessna revision: Model Revision No. FAA Approved Date 500 43 April 15, 1980 501 13 April 18, 1980 550 13 April 15, 1980 551 10 April 18, 1980 D) Any equivalent method of compliance with this Airworthiness Directive must be approved by the Chief, Wichita Engineering and Manufacturing District Office, Federal Aviation Administration, Room 238, Terminal Building No. 2299, Mid-Continent Airport, Wichita, Kansas 67209. This amendment becomes effective May 12, 1980. FOOTER:
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Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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