AD 82-01-05 R2
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Learjet Inc. | 23 | Airworthiness Directives; Gates Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25D, 25F, 28, 29, 35, 35A, 36 and 36A Series Airplanes |
| aircraft | Learjet Inc. | 24 | Airworthiness Directives; Gates Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25D, 25F, 28, 29, 35, 35A, 36 and 36A Series Airplanes |
| aircraft | Learjet Inc. | 24A | Airworthiness Directives; Gates Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25D, 25F, 28, 29, 35, 35A, 36 and 36A Series Airplanes |
| aircraft | Learjet Inc. | 24B | Airworthiness Directives; Gates Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25D, 25F, 28, 29, 35, 35A, 36 and 36A Series Airplanes |
| aircraft | Learjet Inc. | 24B-A | Airworthiness Directives; Gates Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25D, 25F, 28, 29, 35, 35A, 36 and 36A Series Airplanes |
| aircraft | Learjet Inc. | 24C | Airworthiness Directives; Gates Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25D, 25F, 28, 29, 35, 35A, 36 and 36A Series Airplanes |
| aircraft | Learjet Inc. | 24D | Airworthiness Directives; Gates Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25D, 25F, 28, 29, 35, 35A, 36 and 36A Series Airplanes |
| aircraft | Learjet Inc. | 24D-A | Airworthiness Directives; Gates Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25D, 25F, 28, 29, 35, 35A, 36 and 36A Series Airplanes |
| aircraft | Learjet Inc. | 24E | Airworthiness Directives; Gates Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25D, 25F, 28, 29, 35, 35A, 36 and 36A Series Airplanes |
| aircraft | Learjet Inc. | 24F | Airworthiness Directives; Gates Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25D, 25F, 28, 29, 35, 35A, 36 and 36A Series Airplanes |
| aircraft | Learjet Inc. | 24F-A | Airworthiness Directives; Gates Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25D, 25F, 28, 29, 35, 35A, 36 and 36A Series Airplanes |
| aircraft | Learjet Inc. | 25D | Airworthiness Directives; Gates Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25D, 25F, 28, 29, 35, 35A, 36 and 36A Series Airplanes |
| aircraft | Learjet Inc. | 25F | Airworthiness Directives; Gates Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25D, 25F, 28, 29, 35, 35A, 36 and 36A Series Airplanes |
| aircraft | Learjet Inc. | 28 | Airworthiness Directives; Gates Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25D, 25F, 28, 29, 35, 35A, 36 and 36A Series Airplanes |
| aircraft | Learjet Inc. | 29 | Airworthiness Directives; Gates Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25D, 25F, 28, 29, 35, 35A, 36 and 36A Series Airplanes |
| aircraft | Learjet Inc. | 35 | Airworthiness Directives; Gates Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25D, 25F, 28, 29, 35, 35A, 36 and 36A Series Airplanes |
| aircraft | Learjet Inc. | 35A (C-21A) | Airworthiness Directives; Gates Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25D, 25F, 28, 29, 35, 35A, 36 and 36A Series Airplanes |
| aircraft | Learjet Inc. | 36 | Airworthiness Directives; Gates Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25D, 25F, 28, 29, 35, 35A, 36 and 36A Series Airplanes |
| aircraft | Learjet Inc. | 36A | Airworthiness Directives; Gates Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25D, 25F, 28, 29, 35, 35A, 36 and 36A Series Airplanes |
Unsafe Condition
Failure of the Stall Warning Accelerometer Unit could result in an inoperative stall warning system, which may not provide adequate warning of an impending stall.
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Required Actions
Inspect the Stall Warning Accelerometer Unit in accordance with specified service bulletins within 50 hours time-in-service if not inspected in the last 200 hours before the AD effective date. Subsequent inspections must occur at intervals not exceeding 220 hours time-in-service. Exemption applies for models 35 and 36 with Kit 83-2.
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Compliance Time
Within the next 50 hours time-in-service, and at intervals not to exceed 220 hours time-in-service thereafter
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Affected Aircraft
Gates Learjet Models 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25D, 25F, 28, 29, 35, 35A, 36, 36A with specified serial ranges as listed in the AD text.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Stall Warning Accelerometer Unit
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_82-01-05_R.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 82-01-05 R2 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Gates Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 2...Show more Subject: Stall Warning Accelerometer Unit Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 04/10/1986 Make: Learjet Inc. Model: 23 | 24 | 24A | 24B | 24B-A | 24C | 24D | 24D-A | 24E | 24F | 24F-A | 25D | 25F | 28 | 29 | 35 | 35A...Show more Product Type: Aircraft Product Subtype: Small/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: 82-01-05 R2 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-5245 AD NUMBER: 82-01-05 R2 SUBJECT HEADING: Airworthiness Directives; Gates Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25D, 25F, 28, 29, 35, 35A, 36 and 36A Series Airplanes ACTION: SUMMARY: DATES: Effective April 10, 1986. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 82-01-05 R2 GATES LEARJET: Amendment 39-4297 as amended by Amendment 39-4746 is further amended by Amendment 39-5245. Applies to the following models and serial number airplanes certificated in any category. MODEL SERIAL NUMBER 23 23-003 through 23-099 24, 24A 24A-011, 24A-012, 24-015, 24-019, 24-031, 24-043, 24-050, 24-051, 24-055,24-060, 24-065, 24-087, 24-096, and 24-100 through 24-180 24B, 24B-A 24-181 through 24-217, 24-219 through 24-229 24C, 24D, 24D-A 24-218, 24-230 through 24-328 24E, 24F, 24F-A 24-329 through 24-357 25D, 25F 25-206 through 25-336, 25-338 and on 28 28-001 and on 29 29-001 and on 35, 35A 35-001 through 35-505 36, 36A 36-001 through 36-053 COMPLIANCE: Required as indicated. A. To assure proper operation of the Stall Warning Accelerometer Unit, unless previously inspected in the last 200 hours time-in-service before the effective date of this AD, within the next 50 hours time-in-service, and at intervals not to exceed 220 hours time-in-service thereafter, perform the inspection of the Stall Warning Accelerometer in accordance with Gates Learjet Service Bulletins (SB) 23/24/25-301B, SB 28/29-27-3B, or SB 35/36-27-12B, as appropriate. Models 35 and 36 series airplanes incorporating Gates Learjet Airplane Accessory Kit 83-2 are exempt from the requirements of this AD. B. Airplanes may be flown in accordance with FAR 21.197 to a location where modifications required by this AD can be accomplished. C. Alternate means of compliance which provide an acceptable level of safety may be used when approved by the Manager, Wichita Aircraft Certification Office, FAA, Central Region, 1801 Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas 67209. All persons affected by this directive who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to Gates Learjet Corporation, P.O. Box 7707, Wichita, Kansas 67277. These documents may be examined at FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or FAA, Central Region, Wichita Aircraft Certification Office, 1801 Airport Road, Room 100, Mid- Continent Airport, Wichita, Kansas. Amendment 39-4297 became effective on January 8, 1982. Amendment 39-4746 became effective on October 31, 1983. This Amendment 39-5245 becomes effective on April 10, 1986. FOOTER:
Document Text
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AD Final Rules - DRS_82-01-05_R.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 82-01-05 R2 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Gates Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 2...Show more Subject: Stall Warning Accelerometer Unit Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 04/10/1986 Make: Learjet Inc. Model: 23 | 24 | 24A | 24B | 24B-A | 24C | 24D | 24D-A | 24E | 24F | 24F-A | 25D | 25F | 28 | 29 | 35 | 35A...Show more Product Type: Aircraft Product Subtype: Small/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: 82-01-05 R2 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-5245 AD NUMBER: 82-01-05 R2 SUBJECT HEADING: Airworthiness Directives; Gates Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25D, 25F, 28, 29, 35, 35A, 36 and 36A Series Airplanes ACTION: SUMMARY: DATES: Effective April 10, 1986. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 82-01-05 R2 GATES LEARJET: Amendment 39-4297 as amended by Amendment 39-4746 is further amended by Amendment 39-5245. Applies to the following models and serial number airplanes certificated in any category. MODEL SERIAL NUMBER 23 23-003 through 23-099 24, 24A 24A-011, 24A-012, 24-015, 24-019, 24-031, 24-043, 24-050, 24-051, 24-055,24-060, 24-065, 24-087, 24-096, and 24-100 through 24-180 24B, 24B-A 24-181 through 24-217, 24-219 through 24-229 24C, 24D, 24D-A 24-218, 24-230 through 24-328 24E, 24F, 24F-A 24-329 through 24-357 25D, 25F 25-206 through 25-336, 25-338 and on 28 28-001 and on 29 29-001 and on 35, 35A 35-001 through 35-505 36, 36A 36-001 through 36-053 COMPLIANCE: Required as indicated. A. To assure proper operation of the Stall Warning Accelerometer Unit, unless previously inspected in the last 200 hours time-in-service before the effective date of this AD, within the next 50 hours time-in-service, and at intervals not to exceed 220 hours time-in-service thereafter, perform the inspection of the Stall Warning Accelerometer in accordance with Gates Learjet Service Bulletins (SB) 23/24/25-301B, SB 28/29-27-3B, or SB 35/36-27-12B, as appropriate. Models 35 and 36 series airplanes incorporating Gates Learjet Airplane Accessory Kit 83-2 are exempt from the requirements of this AD. B. Airplanes may be flown in accordance with FAR 21.197 to a location where modifications required by this AD can be accomplished. C. Alternate means of compliance which provide an acceptable level of safety may be used when approved by the Manager, Wichita Aircraft Certification Office, FAA, Central Region, 1801 Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas 67209. All persons affected by this directive who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to Gates Learjet Corporation, P.O. Box 7707, Wichita, Kansas 67277. These documents may be examined at FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or FAA, Central Region, Wichita Aircraft Certification Office, 1801 Airport Road, Room 100, Mid- Continent Airport, Wichita, Kansas. Amendment 39-4297 became effective on January 8, 1982. Amendment 39-4746 became effective on October 31, 1983. This Amendment 39-5245 becomes effective on April 10, 1986. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
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