AD 70-22-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | 65-90 | Airworthiness Directives; BEECH Model 65-90 Airplanes |
Unsafe Condition
Failure of the ventilating air blower for the fuel burning heater during ground operations may result in overheat damage and fire hazard.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install Beech Differential Pressure Switch Kit No. 90-3053S in accordance with Beech Service Instruction No. 0372-412, or a later FAA approved revision or an equivalent modification approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 50 hours' time 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
BEECH Model 65-90 airplanes with serial numbers LJ-1 thru LJ-75
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Heater Pressure Switch
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_70-22-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 70-22-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BEECH Model 65-90 Airplanes Subject: Heater Pressure Switch Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/24/1970 Make: Textron Aviation Inc. Model: 65-90 Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 70-22-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1094 AD NUMBER: 70-22-01 SUBJECT HEADING: Airworthiness Directives; BEECH Model 65-90 Airplanes ACTION: SUMMARY: DATES: Effective October 24, 1970. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 70-22-01 BEECH: Amendment 39-1094. Applies to Model 65-90 (Serial Numbers LJ-1 thru LJ-75) airplanes. Compliance: Required as indicated, unless already accomplished. To prevent overheat damage and fire hazard which may result from failure of the ventilating air blower for the fuel burning heater during ground operations, accomplish the following: Within the next 50 hours' time in service, after the effective date of this AD, install Beech Differential Pressure Switch Kit No. 90-3053S in accordance with Beech Service Instruction No. 0372-412, or a later FAA approved revision or any equivalent modification submitted to and approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region. This amendment becomes effective October 24, 1970. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_70-22-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 70-22-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BEECH Model 65-90 Airplanes Subject: Heater Pressure Switch Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/24/1970 Make: Textron Aviation Inc. Model: 65-90 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: 70-22-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1094 AD NUMBER: 70-22-01 SUBJECT HEADING: Airworthiness Directives; BEECH Model 65-90 Airplanes ACTION: SUMMARY: DATES: Effective October 24, 1970. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 70-22-01 BEECH: Amendment 39-1094. Applies to Model 65-90 (Serial Numbers LJ-1 thru LJ-75) airplanes. Compliance: Required as indicated, unless already accomplished. To prevent overheat damage and fire hazard which may result from failure of the ventilating air blower for the fuel burning heater during ground operations, accomplish the following: Within the next 50 hours' time in service, after the effective date of this AD, install Beech Differential Pressure Switch Kit No. 90-3053S in accordance with Beech Service Instruction No. 0372-412, or a later FAA approved revision or any equivalent modification submitted to and approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region. This amendment becomes effective October 24, 1970. 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
2023-10-02
final ruleAirworthiness Directives; Transport and Commuter Category Airplanes
Unsafe Condition: Radio altimeter anomalies that are undetected by the automation or pilot, particularly close to the ground (e.g., landing flare), could lead to loss of continued safe flight and landing. Additional...
2020-25-01
final ruleAirworthiness Directives; Textron Aviation, Inc. Airplanes (Type Certificate Previously Held by Beechcraft Corporation)
Unsafe Condition: Fatigue cracks in the lower forward wing fitting due to premature torque indication caused by washer P/N 90-380058-1 on the wing bolt.
2006-13-10
final ruleAirworthiness Directives; Raytheon Aircraft Company 65, 90, 99, and 100 Series Airplanes
Unsafe Condition: Water accumulation in the rudder trim tab, which could result in a change in the mass properties and possibly a lower flutter speed of the airplane. A lower airplane flutter speed could result in f...
2005-18-20
final ruleAirworthiness Directives; Goodrich De-icing and Specialty Systems “FASTprop” Propeller De-icers
Unsafe Condition: Goodrich De-icing and Specialty Systems 'FASTprop' propeller de-icers becoming loose or debonded, and detaching from propeller blades during operation.
