AD 77-23-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-23-250 | Airworthiness Directives; Piper Models PA-23-250 and PA-E23-250 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-23-250 (Navy UO-1) | Airworthiness Directives; Piper Models PA-23-250 and PA-E23-250 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-E23-250 | Airworthiness Directives; Piper Models PA-23-250 and PA-E23-250 Airplanes |
Unsafe Condition
Fuel flow interruption and engine power loss due to possible adverse fuel vaporization during crossfeed operation.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Incorporate the applicable flight manual revision listed in Piper Service Bulletin No. 530 into the FAA-DOA Approved Airplane Flight Manual. The Chief, Engineering & Manufacturing Branch, may adjust the inspection interval upon request with substantiating data.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 10 hours in service 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-23-250 and PA-E23-250, serial numbers 27-2000 to 27-2504 (fuel injected only) and 27-2505 to 27-7754044.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Fuel Flow
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_77-23-09.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 77-23-09 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper Models PA-23-250 and PA-E23-250 Airplanes Subject: Fuel Flow Status: Current Citation: This information is not available. Citation Publish Date: 12/18/1978 Effective Date: 12/19/1978 Make: Piper Aircraft Inc. Model: PA-23-250 | PA-23-250 (Navy UO-1) | PA-E23-250 Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: AIR-700: Compliance & Airworthiness Division Office of Primary Responsibility: AIR-720: Operational Safety Branch CFR Part Reference: Part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: 77-23-09 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3368 AD NUMBER: 77-23-09 SUBJECT HEADING: Airworthiness Directives; Piper Models PA-23-250 and PA-E23-250 Airplanes ACTION: SUMMARY: DATES: Effective December 19, 1978. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 77-23-09 PIPER: Amendment 39-3077 as amended by amendment 39-3368. Applies to Models PA-23-250 and PA-E23-250 Serial Numbers 27-2000 to 27-2504 (fuel injected only) and 27-2505 to 27-7754044. Compliance required within 10 hours in service after the effective date of this AD unless already accomplished. In order to prevent fuel flow interruption and engine power loss due to possible adverse fuel vaporization during crossfeed operation, accomplish the following: a. Incorporate the applicable flight manual revision, as listed below, into the FAA-DOA Approved Airplane Flight Manual in accordance with Piper Service Bulletin No. 530: Airplane Flight Manual Revisions No. Model PA-23-250: 27-2000 to 27-2504 Incl. Fuel Injected Only 1204 27-2505 to 27-3943 Incl. 4800# Gross Weight Only 1308 27-2505 to 27-3943 Incl. 5200# Gross Weight Only 1360 27-3837, 27-3944 to 27-4573 Incl. 5200# Gross Weight Only 1520 27-4426, 27-4574 to 27-7554168 Incl. 5200# Gross Weight Only 1630 27-7654001 to 27-7754044 Incl. 5200# Gross Weight Only 1948 Model PA-E23-250: 27-2505 to 27-3943 Incl. 4995# Gross Weight Only 1378 27-3837, 27-3944 to 27-4573 Incl. 4995# Gross Weight Only 1521 27-4574 to 27-7554168 Incl. 4995# Gross Weight Only 1631 b. The Chief, Engineering & Manufacturing Branch, AEA-210, FAA Eastern Region, may adjust the inspection interval specified in this airworthiness directive upon request of an owner or operator submitted with substantiating data through an FAA maintenance inspector. c. The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to Piper Aircraft Corp., 820 East Bald Eagle Street, Lock Haven, Pennsylvania 17745. These documents may also be examined at FAA Eastern Region Federal Building, JFK International Airport, Jamaica, New York 11430 and at FAA Headquarters, 800 Independence Avenue, S.W., Washington, D.C. A historical file on this AD which includes the incorporated material in full is maintained by the FAA at its headquarters in Washington, D.C. and at the Federal Aviation Administration, Eastern Region. (Piper Service Bulletin No. 530, dated December 10, 1976, pertains to this subject.) Amendment 39-3077 was effective November 18, 1977. This amendment 39-3368 is effective December 19, 1978. FOOTER:
Document Text
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AD Final Rules - DRS_77-23-09.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 77-23-09 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper Models PA-23-250 and PA-E23-250 Airplanes Subject: Fuel Flow Status: Current Citation: This information is not available. Citation Publish Date: 12/18/1978 Effective Date: 12/19/1978 Make: Piper Aircraft Inc. Model: PA-23-250 | 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: 77-23-09 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3368 AD NUMBER: 77-23-09 SUBJECT HEADING: Airworthiness Directives; Piper Models PA-23-250 and PA-E23-250 Airplanes ACTION: SUMMARY: DATES: Effective December 19, 1978. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 77-23-09 PIPER: Amendment 39-3077 as amended by amendment 39-3368. Applies to Models PA-23-250 and PA-E23-250 Serial Numbers 27-2000 to 27-2504 (fuel injected only) and 27-2505 to 27-7754044. Compliance required within 10 hours in service after the effective date of this AD unless already accomplished. In order to prevent fuel flow interruption and engine power loss due to possible adverse fuel vaporization during crossfeed operation, accomplish the following: a. Incorporate the applicable flight manual revision, as listed below, into the FAA-DOA Approved Airplane Flight Manual in accordance with Piper Service Bulletin No. 530: Airplane Flight Manual Revisions No. Model PA-23-250: 27-2000 to 27-2504 Incl. Fuel Injected Only 1204 27-2505 to 27-3943 Incl. 4800# Gross Weight Only 1308 27-2505 to 27-3943 Incl. 5200# Gross Weight Only 1360 27-3837, 27-3944 to 27-4573 Incl. 5200# Gross Weight Only 1520 27-4426, 27-4574 to 27-7554168 Incl. 5200# Gross Weight Only 1630 27-7654001 to 27-7754044 Incl. 5200# Gross Weight Only 1948 Model PA-E23-250: 27-2505 to 27-3943 Incl. 4995# Gross Weight Only 1378 27-3837, 27-3944 to 27-4573 Incl. 4995# Gross Weight Only 1521 27-4574 to 27-7554168 Incl. 4995# Gross Weight Only 1631 b. The Chief, Engineering & Manufacturing Branch, AEA-210, FAA Eastern Region, may adjust the inspection interval specified in this airworthiness directive upon request of an owner or operator submitted with substantiating data through an FAA maintenance inspector. c. The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to Piper Aircraft Corp., 820 East Bald Eagle Street, Lock Haven, Pennsylvania 17745. These documents may also be examined at FAA Eastern Region Federal Building, JFK International Airport, Jamaica, New York 11430 and at FAA Headquarters, 800 Independence Avenue, S.W., Washington, D.C. A historical file on this AD which includes the incorporated material in full is maintained by the FAA at its headquarters in Washington, D.C. and at the Federal Aviation Administration, Eastern Region. (Piper Service Bulletin No. 530, dated December 10, 1976, pertains to this subject.) Amendment 39-3077 was effective November 18, 1977. This amendment 39-3368 is effective December 19, 1978. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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