# SAIB 2026-07: MAIN LANDING GEAR ATTACH SECTION, Trunnion Pins - Type: Special airworthiness information bulletin (advisory, not mandatory) - Status: Current - Revision: 0 - Issued: March 19, 2026 - Products: Learjet 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25 and 17 more - Product type: Aircraft, Small Airplane, Large Airplane - PDF: https://openairdocs.org/files/sha256/5b/45/5b45085696fa3bba4396956fc11261bbbbc53af14b919a136a509df833ff19c2 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID104986002320260319154109.0001 - DRS record last changed: March 19, 2026 - Page: https://openairdocs.org/saib/2026-07 ## Text FAA Aviation Safety **SPECIAL AIRWORTHINESS** INFORMATION BULLETIN SUBJ: MAIN LANDING GEAR ATTACH SECTION, Trunnion Pins SAIB: 2026-07 Date: March 19, 2026 This is information only. Recommendations aren’t mandatory. Introduction This Special Airworthiness Information Bulletin advises owners, operators, and maintainers of Learjet Inc. (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, 55C, and 60 airplanes of the potential for improper installation of the aft trunnion pin in the main landing gear, which could result in collapse of that gear during taxi, takeoff, or landing. This SAIB also provides recommended actions to address this concern. At this time, the airworthiness concern is not an unsafe condition that would warrant airworthiness directive (AD) action under Title 14 of the Code of Federal Regulations (14 CFR) part 39. Background The FAA is issuing this SAIB in response to feedback from industry stakeholders. There have been multiple events reported where the improper installation of the aft trunnion pin in the main landing gear has resulted in gear collapse, including an accident in Scottsdale, Arizona, on February 10, 2025. To address this airworthiness concern, Learjet released alert service bulletins (ASBs) for the affected models. These ASBs recommend a one-time inspection of the main landing gear aft trunnion pins and additional actions to ensure correct installation. See Table 1 for the applicable ASB by model. Table 1 Model Alert Service Bulletin Date Learjet 23/24/25 SB A23/24/25-32-20 Mar 7, 2025 Learjet 28/29 SB A28/29-32-21 Mar 7, 2025 Learjet 31 SB A31-32-25 Mar 7, 2025 Learjet 35/36 SB A35/36-32-29 Mar 7, 2025 Learjet 55 SB A55-32-26 Mar 7, 2025 Learjet 60 SB A60-32-42 Mar 7, 2025 Learjet also released temporary revisions to the maintenance manuals of the affected models to add warnings and notes to ensure future maintenance is performed correctly. Some of these temporary revisions have been incorporated into the respective manuals. See Table 2 for the status as of publication of this SAIB. Table 2 Model Revision / Temporary Revision Date Learjet 23 Temporary Revision No. 25-01 Mar 24, 2025 Learjet 24 Temporary Revision No. 25-01 Mar 24, 2025 Learjet 24B Temporary Revision No. 25-01 Mar 24, 2025 Learjet 24D/E/F Temporary Revision No. 25-01 Mar 24, 2025 Learjet 25 Temporary Revision No. 25-01 Mar 24, 2025 Learjet 25B/C/D/F Temporary Revision No. 32-29 Mar 24, 2025 Learjet 28/29 Maintenance Manual 32-11-00 Aug 12, 2025 Learjet 31/31A Maintenance Manual 32-11-00 Aug 12, 2025 Learjet 35/35A/36/36A Maintenance Manual 32-11-00 Sep 11, 2025 Learjet 55/55B/55C Maintenance Manual 32-11-00 Aug 12, 2025 Learjet 60/60XR Maintenance Manual 32-11-00 Jun 26, 2025 Recommendations The FAA recommends that all owners, operators, and maintainers of the affected airplanes perform the following actions at the earliest opportunity: • Review the information in the applicable Learjet ASB identified in Table 1, particularly for airplanes that have recently undergone maintenance of the main landing gear, and accomplish the actions included therein. • Incorporate the revisions of the applicable maintenance manual or temporary revisions identified in Table 2. For Further Information Contact Adam Hein, Aviation Safety Engineer, FAA, 1801 S Airport Road, Wichita, KS 67209; phone: (316) 946-4116; email: ccb-cos@faa.gov. For Related Service Information Contact Business Aircraft, Learjet Inc., One Learjet Way, MS 53, Wichita, KS 67277-7707; phone: (866) 538-1247; email: ac.ict@aero.bombardier.com; website: https://my.bombardier.com. ## Registered aircraft it may concern (OpenAirDocs) Registry models matched by make and model, the same way as ADs, most registered aircraft first. - [Learjet 60](https://openairdocs.org/model/learjet-60): 237 registered aircraft (airframe model) - [Gates Learjet 35A](https://openairdocs.org/model/gates-learjet-35a): 135 registered aircraft (airframe model) - [Learjet 31A](https://openairdocs.org/model/learjet-31a): 104 registered aircraft (airframe model) - [Gates Learjet 55](https://openairdocs.org/model/gates-learjet-55): 54 registered aircraft (airframe model) - [Learjet 35A](https://openairdocs.org/model/learjet-35a): 24 registered aircraft (airframe model) - [Gates Lear Jet 36A](https://openairdocs.org/model/gates-lear-jet-36a): 21 registered aircraft (airframe model) - [Gates Learjet 25D](https://openairdocs.org/model/gates-learjet-25d): 20 registered aircraft (airframe model) - [Gates Lear Jet 35](https://openairdocs.org/model/gates-lear-jet-35): 16 registered aircraft (airframe model) - [Learjet 31](https://openairdocs.org/model/learjet-31): 15 registered aircraft (airframe model) - [Gates Lear Jet 36](https://openairdocs.org/model/gates-lear-jet-36): 13 registered aircraft (airframe model) - [Gates Lear Jet 25B](https://openairdocs.org/model/gates-lear-jet-25b): 12 registered aircraft (airframe model) - [Gates Lear Jet 24D](https://openairdocs.org/model/gates-lear-jet-24d): 7 registered aircraft (airframe model) - [Learjet 24](https://openairdocs.org/model/learjet-24): 7 registered aircraft (airframe model) - [Gates Learjet 55C](https://openairdocs.org/model/gates-learjet-55c): 6 registered aircraft (airframe model) - [Learjet 23](https://openairdocs.org/model/learjet-23): 6 registered aircraft (airframe model) - [Gates Lear Jet 24F](https://openairdocs.org/model/gates-lear-jet-24f): 4 registered aircraft (airframe model) - [Learjet 24D](https://openairdocs.org/model/learjet-24d): 4 registered aircraft (airframe model) - [Learjet 55](https://openairdocs.org/model/learjet-55): 4 registered aircraft (airframe model) - [Gates Lear Jet 28](https://openairdocs.org/model/gates-lear-jet-28): 3 registered aircraft (airframe model) - [Gates Learjet 55B](https://openairdocs.org/model/gates-learjet-55b): 3 registered aircraft (airframe model) - [Learjet 24B](https://openairdocs.org/model/learjet-24b): 3 registered aircraft (airframe model) - [Gates Lear Jet 24E](https://openairdocs.org/model/gates-lear-jet-24e): 2 registered aircraft (airframe model) - [Learjet 24A](https://openairdocs.org/model/learjet-24a): 2 registered aircraft (airframe model) - [Learjet 25](https://openairdocs.org/model/learjet-25): 2 registered aircraft (airframe model) - [Learjet 60 XR](https://openairdocs.org/model/learjet-60-xr): 2 registered aircraft (airframe model) - [Gates Lear Jet 25](https://openairdocs.org/model/gates-lear-jet-25): 1 registered aircraft (airframe model) - [Gates Lear Jet 25C](https://openairdocs.org/model/gates-lear-jet-25c): 1 registered aircraft (airframe model) - [Gates Learjet 35A (C-21A)](https://openairdocs.org/model/gates-learjet-35a-c-21a): 1 registered aircraft (airframe model) - [Learjet 25D](https://openairdocs.org/model/learjet-25d): 1 registered aircraft (airframe model) - [Learjet 35](https://openairdocs.org/model/learjet-35): 1 registered aircraft (airframe model) - [Gates Lear Jet 24B](https://openairdocs.org/model/gates-lear-jet-24b): 0 registered aircraft (airframe model) - [Gates Lear Jet 24B-A](https://openairdocs.org/model/gates-lear-jet-24b-a): 0 registered aircraft (airframe model) - [Gates Lear Jet 24C](https://openairdocs.org/model/gates-lear-jet-24c): 0 registered aircraft (airframe model) - [Gates Lear Jet 24D-A](https://openairdocs.org/model/gates-lear-jet-24d-a): 0 registered aircraft (airframe model) - [Gates Lear Jet 25F](https://openairdocs.org/model/gates-lear-jet-25f): 0 registered aircraft (airframe model) - [Gates Lear Jet 29](https://openairdocs.org/model/gates-lear-jet-29): 0 registered aircraft (airframe model) - [Gates Learjet 24](https://openairdocs.org/model/gates-learjet-24): 0 registered aircraft (airframe model) - [Learjet 24F-A](https://openairdocs.org/model/learjet-24f-a): 0 registered aircraft (airframe model) - [Learjet 55C](https://openairdocs.org/model/learjet-55c): 0 registered aircraft (airframe model) --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.