AD 75-24-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Learjet Inc. | 24A | Airworthiness Directives; Learjet Model 24A Airplane |
Unsafe Condition
The existing emergency exit on the right side of the fuselage may not provide adequate emergency exit for flight crew members when the airplane is modified per STC ST7RM and used in cargo operations.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install Alpine Aircraft Charters, Inc. STC SA14RM or equivalent approved by the Chief, Engineering and Manufacturing Branch, Rocky Mountain Region, or provide access to the existing emergency exit in an approved manner.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 150 hours time 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
Learjet Inc. Model 24A airplanes modified per STC ST7RM when used in cargo operations.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Crew Emergency Exit
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_75-24-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 75-24-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Learjet Model 24A Airplane Subject: Crew Emergency Exit Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 12/18/1975 Make: Learjet Inc. Model: 24A Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 75-24-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2423 AD NUMBER: 75-24-03 SUBJECT HEADING: Airworthiness Directives; Learjet Model 24A Airplane ACTION: SUMMARY: DATES: Effective December 18, 1975. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 75-24-03 LEARJET MODEL 24A: Amendment 39-2423. Applies only to airplanes modified per STC ST7RM when used in cargo operation. Compliance required within the next 150 hours time in service after the effective date of this AD, unless already accomplished. To provide an adequate emergency exit for flight crew members, install Alpine Aircraft Charters, Inc., STC SA14RM or equivalent approved by Chief, Engineering and Manufacturing Branch, Rocky Mountain Region, or provide access to the existing emergency exit on the right side of the fuselage in a manner approved by Chief, Engineering and Manufacturing Branch, Rocky Mountain Region. This amendment becomes effective on December 18, 1975. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_75-24-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 75-24-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Learjet Model 24A Airplane Subject: Crew Emergency Exit Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 12/18/1975 Make: Learjet Inc. Model: 24A Product Type: Aircraft Product Subtype: Large 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: 75-24-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2423 AD NUMBER: 75-24-03 SUBJECT HEADING: Airworthiness Directives; Learjet Model 24A Airplane ACTION: SUMMARY: DATES: Effective December 18, 1975. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 75-24-03 LEARJET MODEL 24A: Amendment 39-2423. Applies only to airplanes modified per STC ST7RM when used in cargo operation. Compliance required within the next 150 hours time in service after the effective date of this AD, unless already accomplished. To provide an adequate emergency exit for flight crew members, install Alpine Aircraft Charters, Inc., STC SA14RM or equivalent approved by Chief, Engineering and Manufacturing Branch, Rocky Mountain Region, or provide access to the existing emergency exit on the right side of the fuselage in a manner approved by Chief, Engineering and Manufacturing Branch, Rocky Mountain Region. This amendment becomes effective on December 18, 1975. 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
2007-04-18
final ruleAirworthiness Directives; Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, 25F, 28, 29, 31, 31A, 35, 35A (C-21A), 36, 36A, 55, 55B, and 55C Airplanes
Unsafe Condition: Inadvertent operation of a standby fuel pump due to an electrical system malfunction, which could result in inadvertent fuel transfer and over-limit fuel imbalance between the left and right wing f...
2005-23-03
final ruleAirworthiness Directives; Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, and 25F Airplanes
Unsafe Condition: Failure of the spherical accumulator for the main hydraulic system due to fatigue cracking on the threads, which could result in the loss of hydraulic power, damage to the surrounding airplane stru...
2005-23-06
final ruleAirworthiness Directives; Learjet Model 23, 24, 24A, 24B, 24B-A, 24D, 24D-A, 24E, 24F, 25, 25A, 25B, 25C, 25D, and 25F Airplanes Modified by Supplemental Type Certificate SA1731SW, SA1669SW, or SA1670SW
Unsafe Condition: Failure of the thrust reverser accumulator due to fatigue cracking on the female threads, which could result in the loss of hydraulic power and damage to the surrounding airplane structure.
2005-13-36
final ruleAirworthiness Directives; Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, 25F, 28, 29, 31, 31A, 35, 35A (C-21A), and 36 Airplanes
Unsafe Condition: Severe weakening of the aileron cable due to a defective swage, which could lead to reduced controllability of the airplane.
