AD 72-21-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-20 | Airworthiness Directives; Piper Models PA-20 and PA-22 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-20-115 | Airworthiness Directives; Piper Models PA-20 and PA-22 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-20-135 | Airworthiness Directives; Piper Models PA-20 and PA-22 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-20S | Airworthiness Directives; Piper Models PA-20 and PA-22 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-20S-115 | Airworthiness Directives; Piper Models PA-20 and PA-22 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-20S-135 | Airworthiness Directives; Piper Models PA-20 and PA-22 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-22 | Airworthiness Directives; Piper Models PA-20 and PA-22 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-22-108 | Airworthiness Directives; Piper Models PA-20 and PA-22 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-22-135 | Airworthiness Directives; Piper Models PA-20 and PA-22 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-22-150 | Airworthiness Directives; Piper Models PA-20 and PA-22 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-22-160 | Airworthiness Directives; Piper Models PA-20 and PA-22 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-22S-135 | Airworthiness Directives; Piper Models PA-20 and PA-22 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-22S-150 | Airworthiness Directives; Piper Models PA-20 and PA-22 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-22S-160 | Airworthiness Directives; Piper Models PA-20 and PA-22 Aircraft |
Unsafe Condition
Fuel line failure due to flexible fuel line assembly P/N 70322-32 routed from fuel strainer to carburetor.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Identify flexible fuel line assembly using metal identification band. Replace P/N 70322-32 hose with P/N 17766-66 or equivalent approved part. Ensure installation prevents abrasion, interference chafing, and heat damage.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 100 hours in service or at next annual inspection, whichever occurs first, after the effective date of this AD unless already accomplished
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Piper Models PA-20 (S/N 20-1 and up) and PA-22 (S/N 22-1 to 22-9393 inclusive)
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Fuel Line Failure
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_72-21-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 72-21-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper Models PA-20 and PA-22 Aircraft Subject: Fuel Line Failure Status: Current Citation: This information is not available. Citation Publish Date: 10/07/1972 Effective Date: 10/13/1972 Make: Piper Aircraft Inc. Model: PA-20 | PA-20-115 | PA-20-135 | PA-20S | PA-20S-115 | PA-20S-135 | PA-22 | PA-22-108 | PA-22-135 | P...Show more Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: AIR-700: Compliance & Airworthiness Division Office of Primary Responsibility: AIR-720: Operational Safety Branch CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 72-21-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1533 AD NUMBER: 72-21-03 SUBJECT HEADING: Airworthiness Directives; Piper Models PA-20 and PA-22 Aircraft ACTION: SUMMARY: DATES: Effective October 13, 1972. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 72-21-03 PIPER: Amdt. 39-1533. Applies to all PA-20 type aircraft S/N 20-1 and up and PA-22 type aircraft S/N 22-1 to 22-9393 inclusive. Compliance required within 100 hours in service or at next annual inspection, whichever occurs first, after the effective date of this AD unless already accomplished. To prevent potential in-flight fire due to fuel line failure, accomplish the following: Identify the flexible fuel line assembly routed from fuel strainer to the carburetor. A metal identification band permanently affixed to each line may be used for this purpose. Replace any P/N 70322-32 hose assembly with P/N 17766-66 hose assembly or an equivalent part approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region. If the fuel line cannot be identified, it shall also be replaced with P/N 17766-66. Installation and routing of replacement hose assemblies shall be accomplished so as to prevent abrasion, interference chafing, and heat damage. Upon request, and submission of substantiating data through an FAA Maintenance Inspector, the Chief, Engineering and Manufacturing Branch, FAA Eastern Region, may adjust the compliance time specified in this AD. (Piper Service Bulletin No. 351 dated 3 May 1972 pertains to this subject.) This amendment is effective October 13, 1972. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_72-21-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 72-21-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper Models PA-20 and PA-22 Aircraft Subject: Fuel Line Failure Status: Current Citation: This information is not available. Citation Publish Date: 10/07/1972 Effective Date: 10/13/1972 Make: Piper Aircraft Inc. Model: PA-20 | PA-20-115 | PA-20-135 | PA-20S | PA-20S-115 | PA-20S-135 | PA-22 | PA-22-108 | PA-22-135 | P...Show more Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: AIR-700: Compliance & Airworthiness Division Office of Primary Responsibility: AIR-720: Operational Safety Branch CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 72-21-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1533 AD NUMBER: 72-21-03 SUBJECT HEADING: Airworthiness Directives; Piper Models PA-20 and PA-22 Aircraft ACTION: SUMMARY: DATES: Effective October 13, 1972. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 72-21-03 PIPER: Amdt. 39-1533. Applies to all PA-20 type aircraft S/N 20-1 and up and PA-22 type aircraft S/N 22-1 to 22-9393 inclusive. Compliance required within 100 hours in service or at next annual inspection, whichever occurs first, after the effective date of this AD unless already accomplished. To prevent potential in-flight fire due to fuel line failure, accomplish the following: Identify the flexible fuel line assembly routed from fuel strainer to the carburetor. A metal identification band permanently affixed to each line may be used for this purpose. Replace any P/N 70322-32 hose assembly with P/N 17766-66 hose assembly or an equivalent part approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region. If the fuel line cannot be identified, it shall also be replaced with P/N 17766-66. Installation and routing of replacement hose assemblies shall be accomplished so as to prevent abrasion, interference chafing, and heat damage. Upon request, and submission of substantiating data through an FAA Maintenance Inspector, the Chief, Engineering and Manufacturing Branch, FAA Eastern Region, may adjust the compliance time specified in this AD. (Piper Service Bulletin No. 351 dated 3 May 1972 pertains to this subject.) This amendment is effective October 13, 1972. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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