{"id":"F2005L01315","name":"AD/HU 269/111 - Lateral Control Trim Actuator Assembly","slug":"ad-hu-269-111-lateral-control-trim-actuator-assembly","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":35061,"registerId":"commonwealth-F2005L01315-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Schweizer (Hughes) 269 Series Helicopter","sectionType":"division","heading":"Schweizer (Hughes) 269 Series Helicopters","content":"### Schweizer (Hughes) 269 Series Helicopters\n\n| AD/HU 269/111 | Lateral Control Trim Actuator Assembly | 8/2005 TX |\n| ------------- | -------------------------------------- | --------- |\n\n| Applicability: | Model 269C, serial number (S/N) 1865 through 1874 with a prefix of S; Model 269C-1, S/N 0169 through 0191; and Model 269D, Configuration A, S/N 0044 through 0050 with an A suffix, helicopters, with a lateral control trim actuator assembly, part number (P/N) 269A7316-13, installed, except for an actuator assembly containing a number 30 twist drill drilled hole in the lateral trim control housing through the wall of the inner spring tube socket.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. For Model 269C, S/N 1865 through 1874, with a prefix of S, and Model 269C-1, S/N 0169 through 0191.(a) Inspect the lateral control trim actuator assembly for a scuffmark, indentation, or outer spring guide tube deformation. Inspect for security of the inner spring tube in the socket of the lateral trim control housing by rotating and pulling on the inner spring tube. Examine the resin bead around the base of the inner spring tube and housing socket. Resin should be translucent dark pink in colour to indicate a good bond. Conduct the inspection by following the Procedures in Part I of Schweizer Service Bulletin B-283.1 or C1B- 017.1, both dated 4 March 2005, respectively, as applicable.(b) If a scuffmark, indentation, or deformation exists on the outer spring tube, or the inner spring tube is loose or has motion, or the bonding is separated, remove the lateral control trim actuator assembly; modify the trim control housing and the inner spring tube; and test run the actuator assembly. Modify and test run the actuator assembly by following the Procedures in Part II of Schweizer Service Bulletin B-283.1 or C1B- 017.1, as applicable.(c) If no scuffmark, indentation, or deformation exists on the outer spring tube, or the inner spring tube is not loose, or the bonding is not separated, modify the lateral control trim actuator assembly as required by Requirement 1(b) of this Directive.2. For Model 269D, Configuration A, S/N 0044 through 0050 with a suffix of A.Modify the lateral control trim actuator assembly by following the Procedures in Schweizer Service Bulletin DB-012, paragraphs a through i, dated 8 February 2005. |\n\n|             | Note: FAA AD 2005-10-12 Amdt 39-14089 refers.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Compliance: | For Requirement 1(a) Before further flight after the effective date of this AD.For Requirement 1(b) Before further flight after the effective date of this AD.For Requirement 1(c) Within the next 25 hours time-in-service (TIS) following the inspection as detailed in Requirement 1(a) of this Directive.For Requirement 2 Within the next 50 hours TIS after the effective date of this Directive.                                                                                                                                                                                                                              |\n|             | This Airworthiness Directive becomes effective on 2 June 2005.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |\n| Background: | This Directive requires inspecting, modifying, and testing the lateral control trim actuator assembly on certain serial-numbered helicopters following three reported incidents of the inner spring tube separating from the lateral trim control housing resulting in a lateral cyclic control restriction. The actions specified in this Directive are intended to prevent separation of the inner spring tube from the lateral trim control housing and the associated loss of trim control, increased local resistance to right cyclic stick movement, and an emergency landing or subsequent loss of control of the helicopter. |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n30 May 2005","sortOrder":0},{"sectionNumber":"AD/HU 269/111","sectionType":"part","heading":"AD/HU 269/111","content":"## AD/HU 269/111","sortOrder":1},{"sectionNumber":"Lateral Control Trim Actuator Assembly","sectionType":"part","heading":"Lateral Control Trim Actuator Assembly","content":"## Lateral Control Trim Actuator Assembly","sortOrder":2},{"sectionNumber":"8/2005 TX","sectionType":"part","heading":"8/2005 TX","content":"## 8/2005 TX","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This is a standard, targeted Airworthiness Directive addressing a specific safety defect in a defined fleet of helicopters. The scope remains precisely limited to the identified safety issue and affected aircraft population."},"complexity_factors":["Highly specific applicability criteria involving multiple model variants, serial number ranges, and alphanumeric prefixes/suffixes","Nested conditional requirements: different actions required depending on inspection findings (damage found vs. no damage found)","Cross-references to external technical documents (Schweizer Service Bulletins B-283.1, C1B-017.1, and DB-012) without reproducing their content","Multiple compliance deadlines based on different triggers (effective date, inspection completion, flight hours accumulated)","Exception clause excluding already-modified parts (those with \"number 30 twist drill\" hole)","Technical aviation terminology requiring specialized knowledge (TIS = Time-In-Service, cyclic control, resin bonding, spring tube sockets)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) that requires specific maintenance actions on certain helicopters.\n\n**What it does:**\nThis directive orders owners and operators of specific Schweizer (formerly Hughes) 269 series helicopters to inspect and potentially repair a component called the **lateral control trim actuator assembly** — a part that helps pilots adjust and hold the helicopter's cyclic control (the stick that controls forward/backward and left/right movement).\n\n**Who it affects:**\n- **Model 269C** helicopters with serial numbers 1865–1874 (prefix \"S\")\n- **Model 269C-1** helicopters with serial numbers 0169–0191  \n- **Model 269D (Configuration A)** helicopters with serial numbers 0044–0050 (suffix \"A\")\n\nOnly helicopters with a specific part installed (part number 269A7316-13) are affected, unless that part has already been modified with a specific repair (a \"number 30 twist drill\" hole).\n\n**What must be done:**\n- **For 269C and 269C-1 models:** Inspect the actuator assembly for damage, loose parts, or failed bonding (glue). If problems are found, remove and repair the assembly immediately. If no problems are found, still modify the assembly within 25 flight hours.\n- **For 269D models:** Modify the assembly within 50 flight hours — no inspection needed first.\n\n**Why it matters:**\nThree incidents were reported where an inner spring tube separated from its housing, causing restricted movement of the cyclic control stick. This could make the helicopter harder to control, potentially leading to loss of control or an emergency landing. The directive prevents this dangerous failure."},"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":false,"description":"This Directive stays within the original safety-focused purpose: prevent separation of the inner spring tube from the lateral trim control housing on a narrowly defined set of Schweizer 269-series helicopters. It does not broaden applicability beyond the specified P/N and serial numbers; the only narrowing feature is the stated exemption for actuator assemblies that already have the number 30 twist-drill hole. The Directive prescribes inspection and retrofit/modification actions consistent with that original safety objective and does not add unrelated regulatory requirements."},"complexity_factors":["Model- and serial-number-specific applicability (multiple serial ranges across three models and a suffix requirement)","Single part-number applicability (P/N 269A7316-13) with a specific physical exemption (number 30 twist-drill hole)","Multiple conditional paths: inspect → if defect then remove/modify/test; if no defect still modify within 25 TIS","Different procedures required by model group: Part I/II of Service Bulletins B-283.1 or C1B-017.1 versus DB-012 for 269D","Different compliance timings: 'before further flight' for inspection/removal, 25 hours TIS for modification after inspection, 50 hours TIS for 269D group","Cross-reference to external technical documents (manufacturer Service Bulletins) which contain the detailed technical steps","Specific inspection criteria (physical scuff/indentation/deformation, pull/rotate test, resin colour check) that require judgement by maintenance personnel","Testing requirement after modification (test run) and recording of compliance","Reference to a parallel FAA Airworthiness Directive (FAA AD 2005-10-12) for related guidance"],"plain_english_summary":"This Directive requires owners/operators of specified Schweizer (Hughes) 269C/269C-1/269D (Config A) helicopters with actuator P/N 269A7316-13 to inspect and, within short TIS windows, modify and test the lateral control trim actuator to prevent inner spring-tube separation that has caused lateral cyclic control restriction. It mandates inspections before further flight and places inspection/modification, downtime and cost responsibility on operators and maintenance organisations to eliminate a risk of loss of trim or control."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-hu-269-111-lateral-control-trim-actuator-assembly","history":"/api/acts/ad-hu-269-111-lateral-control-trim-actuator-assembly/history","analysis":"/api/acts/ad-hu-269-111-lateral-control-trim-actuator-assembly/analysis","conflicts":"/api/acts/ad-hu-269-111-lateral-control-trim-actuator-assembly/conflicts","importantCases":"/api/acts/ad-hu-269-111-lateral-control-trim-actuator-assembly/important-cases","documents":"/api/acts/ad-hu-269-111-lateral-control-trim-actuator-assembly/documents"}}