AD 73-09-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-22 | Airworthiness Directives; Piper Models PA-22-150, PA-22S-150, PA-22-160, and PA-22S-160 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-22-108 | Airworthiness Directives; Piper Models PA-22-150, PA-22S-150, PA-22-160, and PA-22S-160 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-22-135 | Airworthiness Directives; Piper Models PA-22-150, PA-22S-150, PA-22-160, and PA-22S-160 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-22-150 | Airworthiness Directives; Piper Models PA-22-150, PA-22S-150, PA-22-160, and PA-22S-160 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-22-160 | Airworthiness Directives; Piper Models PA-22-150, PA-22S-150, PA-22-160, and PA-22S-160 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-22S-135 | Airworthiness Directives; Piper Models PA-22-150, PA-22S-150, PA-22-160, and PA-22S-160 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-22S-150 | Airworthiness Directives; Piper Models PA-22-150, PA-22S-150, PA-22-160, and PA-22S-160 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-22S-160 | Airworthiness Directives; Piper Models PA-22-150, PA-22S-150, PA-22-160, and PA-22S-160 Aircraft |
Unsafe Condition
Power interruption and acceleration hangup resulting from abrupt throttle movement.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Attach an operating limitation placard near the throttle with 1/8 inch minimum lettering stating 'DO NOT OPEN THROTTLE RAPIDLY - (IDLE TO FULL THROTTLE, 2 SECONDS MINIMUM)'
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 10 hours 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
Piper Models PA-22-150, PA-22S-150, PA-22-160, PA-22S-160 equipped with Lycoming O-320 series engines and Marvel Schebler Carburetors Model MA-4-SPA, Part Numbers 10-3678-11, 10-3678-12, 10-3678-32, and other PA-22 type aircraft modified to these engine/carburetor configurations.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Operating Limitation Placard - Throttle Hangup
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_73-09-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 73-09-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper Models PA-22-150, PA-22S-150, PA-22-160, and PA-22S-160 Aircraft Subject: Operating Limitation Placard - Throttle Hangup Status: Current Citation: This information is not available. Citation Publish Date: 05/03/1973 Effective Date: 05/07/1973 Make: Piper Aircraft Inc. Model: PA-22 | PA-22-108 | PA-22-135 | PA-22-150 | PA-22-160 | PA-22S-135 | PA-22S-150 | PA-22S-160 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: 73-09-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1631 AD NUMBER: 73-09-06 SUBJECT HEADING: Airworthiness Directives; Piper Models PA-22-150, PA-22S-150, PA-22-160, and PA-22S-160 Aircraft ACTION: SUMMARY: DATES: Effective May 7, 1973. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 73-09-06 PIPER: Amendment 39-1631. Applies to Model PA-22-150, PA-22S-150, PA-22-160 and PA-22S-160 aircraft equipped with Lycoming O-320 series engines and Marvel Schebler Carburetors Model MA-4-SPA, Part Numbers 10-3678-11, 10-3678-12, 10-3678-32, and to other PA-22 type aircraft which have been modified to these engine/carburetor configurations. Compliance required within the next 10 hours in service after the effective date of this AD, unless already accomplished. To prevent power interruption and acceleration hangup resulting from abrupt throttle movement, accomplish the following: Attach the following operating limitation placard to the instrument panel near the throttle in full view of the pilot. Use 1/8 inch min. size lettering. "DO NOT OPEN THROTTLE RAPIDLY - (IDLE TO FULL THROTTLE, 2 SECONDS MINIMUM)" The placard may be fabricated by the owner or operator. This amendment is effective May 7, 1973. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_73-09-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 73-09-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper Models PA-22-150, PA-22S-150, PA-22-160, and PA-22S-160 Aircraft Subject: Operating Limitation Placard - Throttle Hangup Status: Current Citation: This information is not available. Citation Publish Date: 05/03/1973 Effective Date: 05/07/1973 Make: Piper Aircraft Inc. Model: PA-22 | PA-22-108 | PA-22-135 | PA-22-150 | PA-22-160 | PA-22S-135 | PA-22S-150 | PA-22S-160 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: 73-09-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1631 AD NUMBER: 73-09-06 SUBJECT HEADING: Airworthiness Directives; Piper Models PA-22-150, PA-22S-150, PA-22-160, and PA-22S-160 Aircraft ACTION: SUMMARY: DATES: Effective May 7, 1973. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 73-09-06 PIPER: Amendment 39-1631. Applies to Model PA-22-150, PA-22S-150, PA-22-160 and PA-22S-160 aircraft equipped with Lycoming O-320 series engines and Marvel Schebler Carburetors Model MA-4-SPA, Part Numbers 10-3678-11, 10-3678-12, 10-3678-32, and to other PA-22 type aircraft which have been modified to these engine/carburetor configurations. Compliance required within the next 10 hours in service after the effective date of this AD, unless already accomplished. To prevent power interruption and acceleration hangup resulting from abrupt throttle movement, accomplish the following: Attach the following operating limitation placard to the instrument panel near the throttle in full view of the pilot. Use 1/8 inch min. size lettering. "DO NOT OPEN THROTTLE RAPIDLY - (IDLE TO FULL THROTTLE, 2 SECONDS MINIMUM)" The placard may be fabricated by the owner or operator. This amendment is effective May 7, 1973. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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