AD 75-20-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | B24R | Airworthiness Directives; BEECH Model B24R Airplanes. |
Unsafe Condition
Propeller governor failure due to Rust Ban Preservative Oil or insufficient total time in service (less than 25 hours).
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Drain Rust Ban Preservative Oil and refill with SAE 30 or SAE 50 mineral oil or engine manufacturer's recommended oil. Remove and replace propeller governor with new or serviceable P/N A210490 if total time in service is less than 25 hours. Use FAR 21.197 to fly to a location where AD can be accomplished if propeller governor properly governs RPM during pre-flight runup.
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Compliance Time
Prior to further flight
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Affected Aircraft
BEECH Model B24R airplanes with serial numbers MC-151 thru MC-302, MC-304, MC-307, MC-309, MC-310, MC-312 thru MC-315, MC-317, MC-324, MC-328, MC-333, MC-336, MC-344, MC-345, MC-347 thru MC-357, MC-359, and MC-361 thru MC-364.
AI-generated summary from the source AD text. Verify against the official source before acting.
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_75-20-08.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 75-20-08 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BEECH Model B24R Airplanes. Subject: Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 09/15/1975 Make: Textron Aviation Inc. Model: B24R Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 75-20-08 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2374 AD NUMBER: 75-20-08 SUBJECT HEADING: Airworthiness Directives; BEECH Model B24R Airplanes. ACTION: SUMMARY: DATES: Effective September 15, 1975 ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 75-20-08 BEECH: Amendment 39-2374. Applies to Model B24R (Serial Numbers MC-151 thru MC-302, MC-304, MC-307, MC-309, MC-310, MC-312 thru MC-315, MC-317, MC-324, MC-328, MC-333, MC-336, MC-344, MC-345, MC-347 thru MC-357, MC-359 and MC-361 thru MC-364) airplanes. Compliance: Required as indicated, unless already accomplished. To preclude the possibility of propeller governor failure, accomplish the following: 1) Unless previously accomplished, prior to further flight, drain the Rust Ban Preservative Oil installed by the airplane manufacturer and refill with SAE 30 or SAE 50 straight mineral oil or the type and grade of oil recommended by the engine manufacturer. 2) If the airplane has less than 25 hours' total time in service, prior to further flight, remove the propeller governor and replace with a new or serviceable P/N A210490 propeller governor. 3) Aircraft may be flown to a place where the AD can be accomplished in accordance with FAR 21.197 providing the propeller governor is found to govern engine RPM properly during pre-flight runup. Beechcraft Service Instruction No. 0765-254 pertains to this subject. This amendment becomes effective October 3, 1975, to all persons except those to whom it was made effective earlier by air mail letter issued September 15, 1975. FOOTER:
Document Text
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AD Final Rules - DRS_75-20-08.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 75-20-08 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BEECH Model B24R Airplanes. Subject: Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 09/15/1975 Make: Textron Aviation Inc. Model: B24R Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 75-20-08 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2374 AD NUMBER: 75-20-08 SUBJECT HEADING: Airworthiness Directives; BEECH Model B24R Airplanes. ACTION: SUMMARY: DATES: Effective September 15, 1975 ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 75-20-08 BEECH: Amendment 39-2374. Applies to Model B24R (Serial Numbers MC-151 thru MC-302, MC-304, MC-307, MC-309, MC-310, MC-312 thru MC-315, MC-317, MC-324, MC-328, MC-333, MC-336, MC-344, MC-345, MC-347 thru MC-357, MC-359 and MC-361 thru MC-364) airplanes. Compliance: Required as indicated, unless already accomplished. To preclude the possibility of propeller governor failure, accomplish the following: 1) Unless previously accomplished, prior to further flight, drain the Rust Ban Preservative Oil installed by the airplane manufacturer and refill with SAE 30 or SAE 50 straight mineral oil or the type and grade of oil recommended by the engine manufacturer. 2) If the airplane has less than 25 hours' total time in service, prior to further flight, remove the propeller governor and replace with a new or serviceable P/N A210490 propeller governor. 3) Aircraft may be flown to a place where the AD can be accomplished in accordance with FAR 21.197 providing the propeller governor is found to govern engine RPM properly during pre-flight runup. Beechcraft Service Instruction No. 0765-254 pertains to this subject. This amendment becomes effective October 3, 1975, to all persons except those to whom it was made effective earlier by air mail letter issued September 15, 1975. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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