AD 2001-07-11

final rule
Data completeness: 70%

Airworthiness Directives; Learjet Model 23, 24, 25, 28, 29, 31, 35, 36, and 55 Series Airplanes

AD Number
2001-07-11
Status
final_rule
Effective Date
Product Category
aircraft
Docket
Docket No. 2001-NM-76-AD
FR Citation
66 FR 19387

Applicability

TypeManufacturerModelDetails
aircraft Learjet 23 Airworthiness Directives; Learjet Model 23, 24, 25, 28, 29, 31, 35, 36, and 55 Series Airplanes

Unsafe Condition

Separation of tire tread from the main landing gear tires could cause damage to the structure and major systems of the airplane, and consequent reduced controllability of the airplane on the ground during takeoff and landing.

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

Required Actions

Within 5 days after the effective date of this AD, perform a general visual inspection of the main landing gear tires to determine if any tire has Goodyear part number (P/N) 178K23-5 within the serial number range of 0148xxxx through 0152xxxx. Replace any affected tires with new or serviceable tires having a part number containing a serial number outside the specified range.

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

Compliance Time

Within 5 days after the effective date of this AD

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

Affected Aircraft

All 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 military), 36, 36A, 55, 55B, and 55C airplanes, certificated in any category.

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

Source: Official FAA Source ↗

Retrieved: Apr 6, 2026

Rights: U.S. Government Public Domain

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View Official Source ↗ Find More ADs for Learjet 23

Related Airworthiness Directives

2007-04-18

final rule

Airworthiness 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: could result in inadvertent fuel transfer by the left or right wing fuel system and subsequent over-limit fuel imbalance between the left and right wing fuel loads.

Effective: Mar 23, 2007 Category: aircraft

2005-23-03

final rule

Airworthiness 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: could result in the loss of hydraulic power, damage to the surrounding airplane structure, and loss of airplane control.

Effective: Dec 19, 2005 Category: aircraft

2005-23-06

final rule

Airworthiness 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: could result in the loss of hydraulic power and damage to the surrounding airplane structure.

Effective: Dec 19, 2005 Category: aircraft

2005-16-09 Recurring

final rule

Airworthiness Directives; Learjet Model 23, 24, 25, 35, and 36 Airplanes

Unsafe Condition: The FAA is superseding an existing airworthiness directive (AD), which applies to certain Learjet Model 23, 24, 25, 35, and 36 airplanes. That AD currently requires repetitive inspections to detect...

Effective: Sep 13, 2005 Category: aircraft

View all Learjet ADs →