AD 59-07-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-24 | Airworthiness Directives; Piper Model PA-24-180 Aircraft |
Unsafe Condition
Inadequate clearance between oil cooler lines and exhaust stack, which could lead to heat damage or failure of the oil cooler lines.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect clearance between oil cooler lines and exhaust stack; reform lines or reposition fittings to achieve a minimum 3/8-inch clearance; install Piper P/N 451 855 adapters if necessary; ensure no interference with cowl.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
not later than June 1, 1959
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Piper Model PA-24-180 Comanche Aircraft
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Oil Cooler Lines Clearance
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_59-07-05.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 59-07-05 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper Model PA-24-180 Aircraft Subject: Oil Cooler Lines Clearance Status: Current Citation: This information is not available. Citation Publish Date: 06/09/1959 Effective Date: Make: Piper Aircraft Inc. Model: PA-24 Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: AIR-700: Compliance & Airworthiness Division Office of Primary Responsibility: AIR-720: Operational Safety Branch CFR Part Reference: Part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: 59-07-05 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 59-07-05 SUBJECT HEADING: Airworthiness Directives; Piper Model PA-24-180 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 59-07-05 PIPER: Applies to PA-24-180 Comanche Aircraft. Compliance required not later than June 1, 1959. Inspection has shown the clearance between oil cooler lines and exhaust stack is not adequate on some aircraft. Clearance between the lines and the stack should be a minimum of three-eights of an inch. In the event inadequate clearance exists, the oil cooler lines should be reformed or the fittings in the cooler should be repositioned slightly so that proper clearance can be obtained. If necessary, adapters Piper P/N 451 855 (Weatherhead No. 3200 x 6) can be installed between the oil cooler and the oil cooler line fittings. When providing for the proper clearance make certain there is no interference between the oil cooler lines and the cowl. (Piper Service Bulletin No. 167 dated January 6, 1959, covers this item.) FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_59-07-05.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 59-07-05 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Piper Model PA-24-180 Aircraft Subject: Oil Cooler Lines Clearance Status: Current Citation: This information is not available. Citation Publish Date: 06/09/1959 Effective Date: Make: Piper Aircraft Inc. Model: PA-24 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: 59-07-05 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 59-07-05 SUBJECT HEADING: Airworthiness Directives; Piper Model PA-24-180 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 59-07-05 PIPER: Applies to PA-24-180 Comanche Aircraft. Compliance required not later than June 1, 1959. Inspection has shown the clearance between oil cooler lines and exhaust stack is not adequate on some aircraft. Clearance between the lines and the stack should be a minimum of three-eights of an inch. In the event inadequate clearance exists, the oil cooler lines should be reformed or the fittings in the cooler should be repositioned slightly so that proper clearance can be obtained. If necessary, adapters Piper P/N 451 855 (Weatherhead No. 3200 x 6) can be installed between the oil cooler and the oil cooler line fittings. When providing for the proper clearance make certain there is no interference between the oil cooler lines and the cowl. (Piper Service Bulletin No. 167 dated January 6, 1959, covers this item.) 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.
Related Airworthiness Directives
2024-14-03
final ruleAirworthiness Directives; Various Airplanes
Unsafe Condition: an un-commanded automatic pitch trim runaway when the autopilot was first engaged, which could result in un-commanded automatic pitch trim runaway and loss of control of the airplane.
2023-09-09 Recurring
final ruleAirworthiness Directives; Various Airplanes, Helicopters, and Engines
Unsafe Condition: Multiple failures of spot-welded, multi-segment v-band couplings at the tailpipe to the turbocharger exhaust housing flange.
2022-03-15
final ruleAirworthiness Directives; Various Airplanes
Unsafe Condition: The displayed fuel quantity can have an error as much as four gallons/fuel tank with the display indicating four gallons with an empty tank. In the context of this event, the end level effect is th...
2015-24-05
final ruleAirworthiness Directives; Piper Aircraft, Inc. Airplanes
Unsafe Condition: Fuel starvation due to the shape of the wing fuel tanks and fuel below a certain level in the tank allowing fuel to move away from the tank outlet during certain maneuvers.