AD 82-01-05 R2

final rule

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

AD Number
82-01-05 R2
Status
final_rule
Effective Date
Product Category
aircraft
Docket
Unknown
FR Citation
This information is not available.

Applicability

TypeManufacturerModelDetails
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.

AI-generated summary from the source AD text. Verify against the official source before acting.

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.

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, and at intervals not to exceed 220 hours time-in-service thereafter

AI-generated summary from the source AD text. Verify against the official source before acting.

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
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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

Show stored source text (verify against official source)
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

Rights: U.S. Government Public Domain

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