AD 66-18-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-23-250 (Navy UO-1) | Airworthiness Directives; Piper Model PA-23-250 and PA-E23-250 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-E23-250 | Airworthiness Directives; Piper Model PA-23-250 and PA-E23-250 Airplanes |
Unsafe Condition
Engine power failures due to induction system icing.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Attach an operating limitation placard to the instrument panel within 10 hours' time in service after the effective date. Modify the alternate air systems to provide heated alternate air within 100 hours' time in service after the effective date, in accordance with Piper Service Bulletin No. 230A and Kit No. 757021.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 10 hours' time in service after the effective date of this AD, until modified in accordance with (b), and within the next 100 hours' time in service after the effective date for modification.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Piper Model PA-23-250 (Navy UO-1) and PA-E23-250 Airplanes, Serial Numbers 27-2505 through 27-3139 and 27-3141 through 27-3275, not equipped with turbochargers.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Induction System Icing
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_66-18-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 66-18-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper Model PA-23-250 and PA-E23-250 Airplanes Subject: Induction System Icing Status: Current Citation: Federal Register: July 23, 1966 Citation Publish Date: 07/23/1966 Effective Date: 08/02/1966 Make: Piper Aircraft Inc. Model: PA-23-250 (Navy UO-1) | PA-E23-250 Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: AIR-700: Compliance & Airworthiness Division Office of Primary Responsibility: AIR-720: Operational Safety Branch CFR Part Reference: Part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: 66-18-03 CITATION: [Federal Register: July 23, 1966] PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-262 AD NUMBER: 66-18-03 SUBJECT HEADING: Airworthiness Directives; Piper Model PA-23-250 and PA-E23-250 Airplanes ACTION: SUMMARY: DATES: Effective August 2, 1966. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 66-18-03 PIPER: Amdt. 39-262 Part 39 Federal Register July 23, 1966. Applies to Model PA-23-250 and PA-E23-250 Airplanes, Serial Numbers 27-2505 through 27-3139 and 27- 3141 through 27-3275, Not Equipped With Turbochargers. Compliance required as indicated, unless already accomplished. To prevent engine power failures due to induction system icing, accomplish the following: (a) Within the next 10 hours' time in service after the effective date of this AD, until modified in accordance with (b), attach the following operating limitation placard to the instrument panel in full view of the pilot: "Do not operate into known or forecast icing conditions. Do not apply manual alternate air." (b) Within the next 100 hours' time in service after the effective date of this AD, modify alternate air systems to provide heated alternate air in accordance with Piper Service Bulletin No. 230A, dated May 6, 1966, incorporating Kit No. 757021. (Piper Service Bulletin No. 230, dated March 4, 1966, also pertains to this subject.) This directive effective August 2, 1966. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_66-18-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 66-18-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper Model PA-23-250 and PA-E23-250 Airplanes Subject: Induction System Icing Status: Current Citation: Federal Register: July 23, 1966 Citation Publish Date: 07/23/1966 Effective Date: 08/02/1966 Make: Piper Aircraft Inc. Model: PA-23-250 (Navy UO-1) | PA-E23-250 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: 66-18-03 CITATION: [Federal Register: July 23, 1966] PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-262 AD NUMBER: 66-18-03 SUBJECT HEADING: Airworthiness Directives; Piper Model PA-23-250 and PA-E23-250 Airplanes ACTION: SUMMARY: DATES: Effective August 2, 1966. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 66-18-03 PIPER: Amdt. 39-262 Part 39 Federal Register July 23, 1966. Applies to Model PA-23-250 and PA-E23-250 Airplanes, Serial Numbers 27-2505 through 27-3139 and 27- 3141 through 27-3275, Not Equipped With Turbochargers. Compliance required as indicated, unless already accomplished. To prevent engine power failures due to induction system icing, accomplish the following: (a) Within the next 10 hours' time in service after the effective date of this AD, until modified in accordance with (b), attach the following operating limitation placard to the instrument panel in full view of the pilot: "Do not operate into known or forecast icing conditions. Do not apply manual alternate air." (b) Within the next 100 hours' time in service after the effective date of this AD, modify alternate air systems to provide heated alternate air in accordance with Piper Service Bulletin No. 230A, dated May 6, 1966, incorporating Kit No. 757021. (Piper Service Bulletin No. 230, dated March 4, 1966, also pertains to this subject.) This directive effective August 2, 1966. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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