{"id":"F2007L01397","name":"AD/BEECH 56/34 - Landing Gear Up-lock Mechanism","slug":"ad-beech-56-34-landing-gear-up-lock-mechanism","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":65748,"registerId":"commonwealth-F2007L01397-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Beechcraft 56TC (Turbo Baron) Series Aer","sectionType":"division","heading":"Beechcraft 56TC (Turbo Baron) Series Aeroplanes","content":"### Beechcraft 56TC (Turbo Baron) Series Aeroplanes\n\n| AD/BEECH 56/34 | Landing Gear Up-lock Mechanism | 6/2007 |\n| -------------- | ------------------------------ | ------ |\n\n| Applicability: | Beechcraft (Turbo-Baron) aircraft models 56TC and A56TC serial numbers TG-1 through TG-94, inclusive.                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Using the information contained in Beechcraft Service Instructions (SI) No. 0448-211 at any FAA approved revision status:1. Determine if each up-lock roller is of the greasible type (one having a drilled and grooved inner race).2. Replace any non-greasible up-lock roller (one having a solid inner race) with the greasible type.3. Install hollow zerk-ended mounting bolts on the up-lock rollers.4. Lubricate the up-lock mechanism.Note: FAA 2007-08-08 Amendment 39-15025 dated 06 April 2007 refers. FAA AD 2007-08-08 supersedes FAA AD 72-22-01 Amendment 39-1544. |\n| Compliance:    | 1. Unless already accomplished, within 100 hours time in service (TIS) after the effective date of this AD.2. Before further flight, after the determination required by Requirement 1 of this AD.3. Unless already accomplished, within 100 hours TIS after the effective date of this AD.4. Unless already accomplished, initially within 100 plus/minus 10 hours TIS, and repetitively thereafter, at intervals not to exceed 100 plus/minus 10 hours TIS.                                                                                                                     |\n|                | This Airworthiness Directive becomes effective on 7 June 2007.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |\n\n| Background: | This AD results from a recent incident involving a Beechcraft Model 95-B55B(T-42A) airplane where a seizure of the uplock rollers occurred. The Requirements of this AD are aimed at decreasing the possibility of gear-up landings caused by seizure of the up-lock rollers. |\n| ----------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png)  \nDavid Punshon  \nDelegate of the Civil Aviation Safety Authority\n\n26 April 2007","sortOrder":0},{"sectionNumber":"AD/BEECH 56/34","sectionType":"part","heading":"AD/BEECH 56/34","content":"## AD/BEECH 56/34","sortOrder":1},{"sectionNumber":"Landing Gear Up-lock Mechanism","sectionType":"part","heading":"Landing Gear Up-lock Mechanism","content":"## Landing Gear Up-lock Mechanism","sortOrder":2},{"sectionNumber":"6/2007","sectionType":"part","heading":"6/2007","content":"## 6/2007","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This AD follows FAA AD 2007-08-08 and explicitly notes that the FAA action supersedes FAA AD 72-22-01. The current directive updates required hardware (greasable rollers and hollow zerk bolts) and adds recurring lubrication intervals, extending the ongoing maintenance obligation compared with the earlier AD identified in the notice (Background; Requirement)."},"complexity_factors":["Limited applicability to specific models and serial numbers narrows scope but requires checking serials (Applicability).","Multiple required actions: inspection, replacement of rollers, installation of specific bolts, and ongoing lubrication (Requirement).","Precise compliance timing: combinations of 'within 100 hours TIS', 'before further flight', and repetitive intervals of 100 ± 10 hours create scheduling constraints (Compliance).","Dependence on an external maintenance document at an FAA-approved revision status (Beechcraft Service Instructions No. 0448-211) introduces version-control and procedural reliance (Requirement).","Parts/fitment constraint: must source greasible rollers and hollow zerk-ended bolts; potential lead times and configuration checks increase logistical burden (Requirement).","Cross-reference to FAA ADs and supersession of an earlier FAA AD links domestic compliance to international airworthiness directives (Requirement/Background)."],"plain_english_summary":"Requires owners/operators of Beechcraft 56TC/A56TC aircraft (serials TG-1–TG-94) to inspect the landing-gear up-lock rollers, replace any non-greasable (solid-race) roller with a greasable type, fit hollow zerk-ended mounting bolts, and lubricate the up-lock mechanism per Beechcraft Service Instructions. Work must be done within specified flight-hour windows and includes recurring lubrication intervals. The aircraft operator pays for parts and maintenance; the Civil Aviation Safety Authority enforces compliance. The measure aims to reduce gear-up landings caused by seized up-lock rollers."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard, targeted Airworthiness Directive addressing a specific mechanical defect in a defined aircraft population. The scope remains precisely limited to the landing gear up-lock mechanism of 94 specific aircraft serial numbers, with no evidence of scope creep beyond the original safety purpose."},"complexity_factors":["Multiple repetitive formatting errors in source text (duplicate headings, fragmented table structure)","Four distinct compliance deadlines with different triggering conditions ('unless already accomplished', 'before further flight', 'plus/minus 10 hours' tolerance bands)","Cross-reference to external technical document (Beechcraft Service Instructions SI No. 0448-211) without reproducing its content","Reference to US FAA Airworthiness Directive (2007-08-08) and its predecessor (72-22-01) for background context","Technical aviation terminology requiring specialized knowledge ('up-lock roller', 'zerk-ended mounting bolts', 'time in service')"],"plain_english_summary":"Owners/operators of Beechcraft 56TC Turbo Baron (serials TG-1 to TG-94) must inspect and modify the landing-gear up-lock mechanism: confirm rollers are greasable, replace non-greasable rollers, fit hollow bolts with zerk grease fittings, and begin regular lubrication. Action required within 100 flight hours of 7 June 2007; greasing then at 90–110 flight hour intervals. This mandatory CASA AD prevents roller seizure that can cause gear‑up landings."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-56-34-landing-gear-up-lock-mechanism","history":"/api/acts/ad-beech-56-34-landing-gear-up-lock-mechanism/history","analysis":"/api/acts/ad-beech-56-34-landing-gear-up-lock-mechanism/analysis","conflicts":"/api/acts/ad-beech-56-34-landing-gear-up-lock-mechanism/conflicts","importantCases":"/api/acts/ad-beech-56-34-landing-gear-up-lock-mechanism/important-cases","documents":"/api/acts/ad-beech-56-34-landing-gear-up-lock-mechanism/documents"}}