{"id":"F2006L03003","name":"AD/TBM 700/45 Amdt 1 - Nose Landing Gear Actuator Hinge Pin","slug":"ad-tbm-700-45-amdt-1-nose-landing-gear-actuator-hinge-pin","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":60287,"registerId":"commonwealth-F2006L03003-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Aerospatiale (Socata) TBM 700 Series Aer","sectionType":"division","heading":"Aerospatiale (Socata) TBM 700 Series Aeroplanes","content":"### Aerospatiale (Socata) TBM 700 Series Aeroplanes\n\n| AD/TBM 700/45 Amdt 1 | Nose Landing Gear Actuator Hinge Pin | 11/2006 TX |\n| -------------------- | ------------------------------------ | ---------- |\n\n| Applicability: | All TBM 700 A and B aircraft fitted with Nose Landing Gear (NLG) part number (P/N) 21130-001-02 whose serial number (S/N) are ranging from B155 to B173 inclusive and S/N EUR 174 to EUR 240 inclusive.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Verify the NLG serial number to determine its applicability to this AD. If the NLG S/N is not listed in the applicability section of this AD no further action is required.2. For aircraft with applicable NLG serial number, incorporate the operational procedure as detailed in paragraph A of the accomplishment instructions of EADS SOCATA Service Bulletin (SB) No. 70-147 or later EASA approved revision into the AFM.Special flight permits may be issued for Aircraft fitted with the applicable NLG serial number, to reach an approved Maintenance Centre to check the batch number and to do the pin check.3. Identify the Pin batch number as instructed in paragraph B of the accomplishment instructions of EADS SOCATA SB No. 70-147 or later EASA approved revision.For aircraft with the correct pin batches numbers, no further action is required. Return the aircraft to service as instructed in the EADS SOCATA SB No. 70-147 or later EASA approved revision.4. For aircraft with pins from the defective pin batches numbers or for which the batch number is unreadable, action in accordance with paragraph B 5, C & D of the accomplishment instructions of EADS SOCATA SB No. 70-147 or later EASA approved revision.5. Replace any pin as instructed in the accomplishment instructions of the EADS SOCATA SB No. 70-147 or later EASA approved revision. |\n\n|             | 6. Perform a dimensional check on any hinge pin listed in EADS SOCATA Service Bulletin (SB) No. 70-147 or later EASA approved revision.7. Do not install on any EADS SOCATA TBM700 series aeroplane, NLG actuator hinge pins coming from the three defectives batches identified as EUR BC 21344-000-01, EUR BD 21344-000-01 & EUR SF 21344-000-01 on Nose Landing Gear P/N 21130-001-02.Note: EASA Emergency AD 2006-0271-E dated 4 September 2006 refers. This AD supersedes EASA AD 2006-0226-E.                                                                                                                                                                     |\n| ----------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Compliance: | 1. Before further flight after the effective date of this AD.2. Before further flight after the effective date of this AD.3. Before further flight after the effective date of this AD.4. Before further flight after the effective date of this AD.5. Any out of tolerance pin, before further flight after the effective date of this AD.Any pin from the defective batches, with satisfactory dimensional check, before3 October 2006.6. After any “Pancake” or “three-point” landing after the effective date of this AD.7. From the effective date of this AD.                                                                                                     |\n|             | This Amendment becomes effective on 8 September 2006.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |\n| Background: | This AD results from one report of a Nose Landing Gear (NLG) hinge pin rupture that caused an uncommanded NLG retraction.Investigations identified the unsafe condition as that resulting from an incomplete thermal treatment done on three hinge pin batches lowering their mechanical properties with a high risk of deformation under service loads.These AD requirements are first to identify the concerned NLG and second to detect the defective hinge pins on aircraft and subsequently carry out replacement of those pins prior to pin rupture.This amendment is issued to extend the landing gear applicability as listed in the original issue of this AD. |\n\n|     | The original issue of this AD became effective on 26 July 2006. |\n| --- | --------------------------------------------------------------- |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n6 September 2006","sortOrder":0},{"sectionNumber":"AD/TBM 700/45 Amdt 1","sectionType":"part","heading":"AD/TBM 700/45 Amdt 1","content":"## AD/TBM 700/45 Amdt 1","sortOrder":1},{"sectionNumber":"Nose Landing Gear Actuator Hinge Pin","sectionType":"part","heading":"Nose Landing Gear Actuator Hinge Pin","content":"## Nose Landing Gear Actuator Hinge Pin","sortOrder":2},{"sectionNumber":"11/2006 TX","sectionType":"part","heading":"11/2006 TX","content":"## 11/2006 TX","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"This amendment expanded the set of affected landing‑gear serial numbers compared with the original issue of the AD. The Background explicitly states the amendment ‘‘is issued to extend the landing gear applicability as listed in the original issue of this AD.’’ Mechanically, that means more TBM 700 aircraft (those with NLG S/N in the added ranges B155–B173 and EUR 174–EUR 240 inclusive) are now subject to the inspection, AFM amendment and mandatory checks/replacements, increasing the number of operators and maintenance organisations required to comply."},"complexity_factors":["Cross‑reference to an external technical document (EADS SOCATA Service Bulletin No. 70-147) and any later EASA‑approved revisions","Conditional branching: different actions if pin batch is acceptable, defective, or unreadable (Requirements 3–5)","Multiple time triggers and event‑based triggers (e.g. \"before further flight\", and \"after any 'pancake' or 'three‑point' landing\") (Compliance)","Specific applicability defined by part number and two serial‑number ranges (Applicability)","Prohibition on future installation of pins from three specifically identified defective batches (Requirement 7)","Limited number of numbered requirements but several distinct tasks (AFM amendment, batch identification, dimensional check, replacement)","Dependency on readable batch markings (practical implementation complication)","Reference to prior and superseded EASA ADs (note and background), indicating regulatory lineage"],"plain_english_summary":"**What this instrument does (mechanically)**\n\n- It requires operators of certain Aerospatiale (SOCATA) TBM 700 A and B aeroplanes to check whether the aircraft have a particular Nose Landing Gear (NLG) part (P/N 21130-001-02) with specific serial numbers (S/N B155–B173 inclusive and S/N EUR 174–EUR 240 inclusive). (Applicability)\n- If an aircraft has an applicable NLG, the operator must incorporate a specified operational procedure from EADS SOCATA Service Bulletin (SB) No. 70-147 (or a later EASA‑approved revision) into the aircraft flight manual (AFM). (Requirement 2)\n- The NLG pin batch number must be inspected and identified according to the steps in the Service Bulletin. Pins from three named defective batches (EUR BC 21344-000-01, EUR BD 21344-000-01, EUR SF 21344-000-01) are not allowed to be installed on any TBM700. (Requirements 3, 7)\n- If a pin is from a defective batch or the batch number cannot be read, the operator must follow further specific remedial steps and replace the pin as instructed in the Service Bulletin. Dimensional checks on listed hinge pins must be performed as instructed. (Requirements 4–6)\n- Timing: most of these checks and required actions must be done “before further flight” after the AD’s effective date; some actions also follow particular events (for example, after a “pancake” or three‑point landing). (Compliance)\n\n**Who this affects**\n\n- Aircraft owners/operators and pilots of the listed TBM 700 A and B aeroplanes (those whose NLG P/N and S/N fall in the stated ranges). (Applicability)\n- Maintenance organisations and maintenance personnel who will carry out batch identification, dimensional checks and any replacements. (Requirements 3–6)\n- The regulator that issues any special flight permits to allow limited flight to a maintenance base. (Requirement 2)\n\n**Why it matters (stated safety issue and how the rule addresses it)**\n\n- The AD responds to one reported instance of an NLG hinge‑pin rupture that led to an uncommanded NLG retraction. Investigations identified an incomplete thermal treatment on three hinge‑pin batches that reduced mechanical properties and increased the risk of deformation or rupture under load. (Background)\n- The required actions are designed to: (a) identify aircraft with the affected gear, (b) detect potentially defective pins, and (c) remove or replace defective pins before they can fail in service. (Requirements and Background)\n\n**Practical effects, costs and incentives**\n\n- Who pays: aircraft owners/operators pay for the inspections, AFM amendment, any dimensional checks, and replacement parts and labour. (Requirements 2–6)\n- Aircraft downtime: because most checks and corrective actions are required “before further flight,” affected aircraft may be grounded until the checks are completed or a special flight permit is obtained to move to an approved maintenance centre. This imposes immediate operational costs (lost flights, scheduling disruption). (Compliance; Requirement 2)\n- Parts and maintenance demand: removal of pins from the three defective batches creates demand for replacement parts and maintenance hours. Maintenance organisations benefit from this work; parts suppliers who can provide acceptable replacement pins may see increased demand. (Requirements 4–6)\n- Risk of delays: if batch numbers are unreadable or replacement stock is scarce, operators could face longer grounding times. (Requirement 4 and Compliance)\n- Behavioural changes: operators may institute routine batch‑checking on inventory, pilots/operators will need the AFM update and to follow the operational procedure, and maintenance shops will need processes for dimensional checks and recordkeeping. (Requirement 2; Requirements 5–6)\n\n**Trade‑offs, implementation risks and compliance burden**\n\n- Trade‑offs: the AD trades immediate operational disruption and replacement cost against reducing the risk of in‑flight gear failure. (Background vs Requirements)\n- Implementation risks: accurate identification of batch numbers is critical; unreadable markings force the more onerous replacement route. Reliance on an external Service Bulletin (SB No. 70‑147 or later EASA‑approved revision) means the detailed technical steps sit outside the AD text and depend on access to and correct application of that SB. (Requirements’ cross‑reference to the SB)\n- Compliance burden: short deadline language (“before further flight”) creates an urgent compliance requirement that can be costly for small operators, who may have fewer spare parts or access to maintenance facilities. (Compliance)\n\n**Who decides and discretion**\n\n- The regulator (delegate of CASA, as signed in the instrument) enforces the AD and may issue special flight permits to allow limited ferry flights to maintenance facilities. The detailed technical actions are determined by the Service Bulletin and any later EASA‑approved revisions cited in the AD. (Requirement 2; signature block)\n\n**Concentrated benefits and potential for market effects**\n\n- Concentrated benefits likely accrue to maintenance organisations and parts suppliers who provide acceptable replacement hinge pins and inspection services. Costs are dispersed across affected TBM 700 operators. The AD narrows the pool of acceptable pins (by banning three specific batch numbers), increasing demand for compliant pins and maintenance. (Requirements 4–7)\n\n**References within the instrument**\n\n- Applicability: serial number and part‑number limits. (Applicability)\n- Requirements 1–7: stepwise actions from checking S/N, AFM amendment, batch identification, remedial action for defective/unreadable pins, replacement, dimensional checks, and installation ban for three defective batches. (Requirement)\n- Compliance: timing for each required action. (Compliance)\n- Background: cause (incomplete thermal treatment on some hinge‑pin batches) and reason for amendment (extension of landing‑gear applicability). (Background)\n\n"},"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":4,"scope_assessment":{"changed":true,"description":"This Amendment 1 explicitly expands the scope beyond the original AD issued 26 July 2006. The background section states it was issued 'to extend the landing gear applicability as listed in the original issue of this AD.' The serial number ranges were broadened to include additional aircraft after further investigation revealed the defective hinge pin batches affected more planes than initially identified."},"complexity_factors":["Multiple cross-references to external EADS SOCATA Service Bulletin No. 70-147 (must consult separate document for actual procedures)","Nested conditional logic: applicability depends on serial number range, then batch number identification, then dimensional check results","Seven distinct compliance requirements with different deadlines (some immediate, some by specific date)","Technical aviation terminology requiring specialized knowledge (AFM, NLG, P/N, S/N, Service Bulletin)","Amendment structure requires understanding of relationship to superseded EASA ADs and previous version of this AD"],"plain_english_summary":"This mandatory CASA Airworthiness Directive targets Socata TBM 700 A/B aircraft with specified nose-gear serials after discovery of hinge pins with incomplete heat treatment that can fracture and cause nose‑wheel collapse. Affected owners/operators must verify gear serials, inspect and identify pin batch numbers, replace pins from defective batches or with unreadable marks, adopt a temporary AFM procedure, and measure pins after hard landings; defective pins must never be re‑installed. The amendment widens the original AD after the issue proved more widespread."}},"importantCases":[],"_links":{"self":"/api/acts/ad-tbm-700-45-amdt-1-nose-landing-gear-actuator-hinge-pin","history":"/api/acts/ad-tbm-700-45-amdt-1-nose-landing-gear-actuator-hinge-pin/history","analysis":"/api/acts/ad-tbm-700-45-amdt-1-nose-landing-gear-actuator-hinge-pin/analysis","conflicts":"/api/acts/ad-tbm-700-45-amdt-1-nose-landing-gear-actuator-hinge-pin/conflicts","importantCases":"/api/acts/ad-tbm-700-45-amdt-1-nose-landing-gear-actuator-hinge-pin/important-cases","documents":"/api/acts/ad-tbm-700-45-amdt-1-nose-landing-gear-actuator-hinge-pin/documents"}}