{"id":"F2007L01388","name":"AD/BEECH 55/95 - Landing Gear Up-lock Mechanism","slug":"ad-beech-55-95-landing-gear-up-lock-mechanism","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":65710,"registerId":"commonwealth-F2007L01388-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Beechcraft 55, 58 and 95-55 (Baron) Seri","sectionType":"division","heading":"Beechcraft 55, 58 and 95-55 (Baron) Series Aeroplanes","content":"### Beechcraft 55, 58 and 95-55 (Baron) Series Aeroplanes\n\n| AD/BEECH 55/95 | Landing Gear Up-lock Mechanism | 6/2007 |\n| -------------- | ------------------------------ | ------ |\n\n| Applicability: | Beechcraft (Baron) aircraft:Group 1:Model 58 serial numbers TH-1 through TH-174, inclusive; andModels 95-55, 95-A55, 95-B55, and 95-B55A serial numbers TC-1 through TC-1402, inclusive; andModels 95-C55, 95-C55A, D55, D55A, E55, and E55A serial numbers TE-1 through TE-846, inclusive.Group 2:Model 95-B55B (T-42A), S/N TF-1 through TF-70, 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:    | Group 1:1. 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.                                                                                                                                                                                                                                                                                                                                                                        |\n\n|             | 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.Group 2:1. Unless already accomplished, within 300 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 300 hours TIS after the effective date of this AD.4. Unless already accomplished, initially within 300 hours TIS, and repetitively thereafter, at intervals not to exceed 100 plus/minus 10 hours TIS. |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n|             | This Airworthiness Directive becomes effective on 7 June 2007.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |\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![](image.001.png)  \nDavid Punshon  \nDelegate of the Civil Aviation Safety Authority\n\n26 April 2007","sortOrder":0},{"sectionNumber":"AD/BEECH 55/95","sectionType":"part","heading":"AD/BEECH 55/95","content":"## AD/BEECH 55/95","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":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The supplied text does not indicate a change in scope from an earlier CASA instrument; it sets inspection/repair requirements for specified serial ranges and references the FAA AD supersession but does not state any narrowing or broadening of the AD's applicability relative to an original CASA intent."},"complexity_factors":["Multiple models and serial-number ranges create a non-uniform applicability set (Applicability).","Two compliance groups with different deadlines (Group 1: 100 hrs; Group 2: 300 hrs) and a mix of one‑off and repetitive tasks (Compliance).","Combination of inspection, parts replacement, hardware installation and recurrent lubrication—requires technical maintenance skills and specific parts (Requirement).","Reference to external service instructions at an FAA‑approved revision status imposes dependency on manufacturer/FAA documents (Requirement).","Compliance measured in flight hours introduces recordkeeping and operational scheduling burdens (Compliance).","Safety rationale tied to a single reported seizure incident, creating concentrated preventive obligations across many operators (Background)."],"plain_english_summary":"This AD orders operators of specified Beechcraft 55/58/95-series aeroplanes to inspect and, if necessary, modify the landing-gear up-lock: identify whether each up-lock roller is greasible, replace solid‑race rollers with greasible ones, fit hollow zerk mounting bolts, and lubricate the mechanism. The measure aims to reduce gear‑up landings after roller seizure. Compliance times differ by group (Group 1: ~100 hours; Group 2: ~300 hours) and include recurring lubrication inspections at roughly 100‑hour intervals."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific mechanical defect in specific aircraft models. The two-group structure reflects different risk profiles or usage patterns (military vs civilian), not scope creep."},"complexity_factors":["Multiple overlapping serial number ranges across 10+ aircraft models requiring careful cross-referencing to determine applicability","Two distinct compliance groups with different hour thresholds (100 vs 300 hours TIS)","Four separate technical requirements with different compliance deadlines for each group","Reference to external technical documents (Beechcraft Service Instructions SI 0448-211) and FAA Airworthiness Directives (2007-08-08, 72-22-01) for full context","Conditional language ('unless already accomplished', 'before further flight') creating branching compliance paths","Repetitive maintenance intervals (100 ± 10 hours) requiring ongoing tracking"],"plain_english_summary":"This AD mandates inspection and modification of the landing-gear up-lock rollers on specified Beechcraft Baron 55/58/95-55 series aircraft to prevent roller seizure that can cause gear‑up landings. It affects owners/operators of particular serial-numbered aircraft (two groups) and was prompted by a seizure incident on a T‑42A.\n\nGroup 1 must comply within 100 flight hours, Group 2 within 300; recurring lubrication is then required every 100 flight hours (±10 hours)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-55-95-landing-gear-up-lock-mechanism","history":"/api/acts/ad-beech-55-95-landing-gear-up-lock-mechanism/history","analysis":"/api/acts/ad-beech-55-95-landing-gear-up-lock-mechanism/analysis","conflicts":"/api/acts/ad-beech-55-95-landing-gear-up-lock-mechanism/conflicts","importantCases":"/api/acts/ad-beech-55-95-landing-gear-up-lock-mechanism/important-cases","documents":"/api/acts/ad-beech-55-95-landing-gear-up-lock-mechanism/documents"}}