AD 73-23-07
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna Aircraft Company | 150 | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 150A | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 150B | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 150C | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 150D | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 150E | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 150F | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 150G | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 150H | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 150J | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 150K | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 150L | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 150M | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 172 | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 172A | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 172B | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 172C | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 172D | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 172E | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 172F (USAF T-41A) | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 172G | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 172H (USAF T-41A) | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 172I | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 172K | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 172L | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 172M | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 172N | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 172P | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 172Q | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 172R | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 172RG | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 172S | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 180 | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 180A | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 180B | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 180C | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 180D | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 180E | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 180F | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 180G | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 180H | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 180J | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 180K | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 182 | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 182A | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 182B | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 182C | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 182D | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 182E | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 182F | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 182G | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 182H | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 182J | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 182K | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 182L | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 182M | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 182N | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 182P | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 182Q | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 182R | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 182S | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 182T | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 185 | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 185A | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 185B | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 185C | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 185D | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | 185E | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | A150K | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | A150L | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
| aircraft | Cessna Aircraft Company | A150M | Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes |
Unsafe Condition
Defective spar attachment fittings (P/N 0523306) remaining in service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace P/N 0523306 wing attach fittings with Cessna Service Kit SK 150-45A (dated July 27, 1973) as referenced in Cessna Service Letter SE73-20 (dated August 17, 1973) or later FAA-approved revisions, or with any other airworthy part approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 50 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 150 (S/Ns 15074635 thru 15074799); Model A150 (S/Ns A1500415 thru 1500427); Model 172 (S/Ns 17261664 thru 17261808); Model 180 (S/Ns 18052335 thru 18052349); Model 182 (S/Ns 18261960 thru 18262105); Model 185 (S/Ns 18502199 thru 18502238)
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Defective Spar Attachment Fittings
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_73-23-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 73-23-07 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes Subject: Defective Spar Attachment Fittings Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 11/19/1973 Make: Cessna Aircraft Company Model: 150 | 150A | 150B | 150C | 150D | 150E | 150F | 150G | 150H | 150J | 150K | 150L | 150M | 172 | 172A...Show more 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: 73-23-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1744 AD NUMBER: 73-23-07 SUBJECT HEADING: Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes ACTION: SUMMARY: DATES: Effective November 19, 1973. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 73-23-07 CESSNA: Amdt. 39-1744. Applies to Model 150 (S/Ns 15074635 thru 15074799); Model A150 (S/Ns A1500415 thru 1500427); Model 172 (S/Ns 17261664 thru 17261808); Model 180 (S/Ns 18052335 thru 18052349); Model 182 (S/Ns 18261960 thru 18262105) and Model 185 (S/Ns 18502199 thru 18502238) airplanes. Compliance: Required as indicted, unless already accomplished. To prevent defective spar attachment fitting from remaining in service, within the next 50 hours' time in service after the effective date of this AD, replace P/N 0523306 wing attach fittings with Cessna Service Kit SK 150-45A, dated July 27, 1973, referred to in Cessna Service Letter SE73-20, dated August 17, 1973, or later FAA-approved revisions, or with any other airworthy part approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region. This amendment becomes effective November 19, 1973. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_73-23-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 73-23-07 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes Subject: Defective Spar Attachment Fittings Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 11/19/1973 Make: Cessna Aircraft Company Model: 150 | 150A | 150B | 150C | 150D | 150E | 150F | 150G | 150H | 150J | 150K | 150L | 150M | 172 | 172A...Show more 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: 73-23-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1744 AD NUMBER: 73-23-07 SUBJECT HEADING: Airworthiness Directives; CESSNA Models 150, A150, 172, 180, 182, 185 Airplanes ACTION: SUMMARY: DATES: Effective November 19, 1973. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 73-23-07 CESSNA: Amdt. 39-1744. Applies to Model 150 (S/Ns 15074635 thru 15074799); Model A150 (S/Ns A1500415 thru 1500427); Model 172 (S/Ns 17261664 thru 17261808); Model 180 (S/Ns 18052335 thru 18052349); Model 182 (S/Ns 18261960 thru 18262105) and Model 185 (S/Ns 18502199 thru 18502238) airplanes. Compliance: Required as indicted, unless already accomplished. To prevent defective spar attachment fitting from remaining in service, within the next 50 hours' time in service after the effective date of this AD, replace P/N 0523306 wing attach fittings with Cessna Service Kit SK 150-45A, dated July 27, 1973, referred to in Cessna Service Letter SE73-20, dated August 17, 1973, or later FAA-approved revisions, or with any other airworthy part approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region. This amendment becomes effective November 19, 1973. 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.
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