{"id":"F2006B10679","name":"AD/HU 369/16 - Passenger Interior - Modification","slug":"ad-hu-369-16-passenger-interior-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116622,"registerId":"commonwealth-F2006B10679-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HU 369/16 - Passenger Interior - Modification","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nMcDonnell Douglas (Hughes) and Kawasaki 369 Series Helicopters\n\nAD/HU 369/16 Passenger Interior \\- Modification 6/75\n\nApplicability: All model 369H with passenger interior in accordance with Hughes drawing 369H90035.\n\nRequirement: 1. Install two conspicuous placards worded:\n\n“DO NOT OCCUPY FOR TAKEOFF AND LANDING”.\n\nThe placards shall be located on the aft face of the forward divider, facing aft, centred on the divider above each seat cushion.\n\n2. Modify the passenger interior by installing occupant head and back support to the aft facing seats in accordance with a scheme approved by the Secretary and remove the placards installed in accordance with para. 1 above.\n\nCompliance: For Para. 1 \\- Within 25 hours time in service after 21 May 1975.\n\nFor Para. 2 \\- Before carriage of passengers in aft facing seats.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-purpose airworthiness directive from 1975 addressing a specific safety deficiency in a specific helicopter model. It has not expanded beyond its original scope; it remains a targeted technical safety order."},"complexity_factors":["Single, specific aircraft model and configuration (Hughes 369H with drawing 369H90035 interior)","Only 2 defined requirements (placards, then modification)","No nested exceptions or conditional logic — straightforward sequential compliance","Simple temporal compliance structure (hours in service, before carriage)","No cross-references to other legislation or complex definitional sections","Total length: approximately 150 words"],"plain_english_summary":"This is an **Airworthiness Directive** (a mandatory safety order) for a specific type of helicopter — the **McDonnell Douglas (Hughes) and Kawasaki 369 Series**, specifically the **369H model** with a particular passenger interior configuration.\n\n**What it does:**\nThis directive requires two safety modifications to helicopters with a specific passenger cabin layout:\n\n1. **Immediate fix:** Install warning signs (placards) on the forward divider behind the front seats that read **\"DO NOT OCCUPY FOR TAKEOFF AND LANDING\"**. These signs must face the rear seats and be positioned above each seat cushion.\n\n2. **Permanent fix:** Install proper head and back support for passengers sitting in the rear-facing seats. Once this proper support is installed and approved by the **Secretary** (the government official responsible for aviation safety at the time), the warning signs can be removed.\n\n**Who it affects:**\n- Owners and operators of **Hughes 369H helicopters** with the specific passenger interior (drawing number 369H90035)\n- Maintenance engineers working on these aircraft\n\n**Why it matters:**\nThis directive addresses a safety hazard where passengers in rear-facing seats lacked adequate protection during takeoff and landing — the most critical phases of flight. Without proper head and back support, passengers could be injured. The placards provide a temporary safety measure until the permanent structural modification is completed.\n\n**Deadlines:**\n- The warning signs must be installed within **25 flight hours** after 21 May 1975\n- The permanent modification must be done **before any passengers are carried** in those rear-facing seats"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This directive changes operational scope for affected 369H helicopters by imposing an immediate restriction on occupying aft‑facing seats for takeoff and landing (placards required) and by mandating a physical retrofit (head and back supports) approved by the Secretary before those seats may be used for passenger carriage. The instrument therefore alters how those seats may be used and places specific compliance obligations on operators (Applicability; Requirement paras. 1–2; Compliance)."},"complexity_factors":["Limited technical scope — affects a single helicopter model and a specific interior drawing (Applicability).","Two‑step compliance path: immediate simple placarding plus a later physical modification (Requirement paras. 1–2).","Regulatory discretion — the permanent modification must follow a scheme approved by the Secretary (Requirement para. 2).","Defined short deadline for the temporary measure (25 hours TIS) creates scheduling pressure (Compliance).","Clear, prescriptive wording and placement requirements for the placards reduce interpretive complexity (Requirement para. 1)."],"plain_english_summary":"Applies to McDonnell Douglas/Kawasaki model 369H helicopters with passenger interiors per Hughes drawing 369H90035. Operators must immediately fit two “DO NOT OCCUPY FOR TAKEOFF AND LANDING” placards on the forward divider (within 25 hours TIS after 21 May 1975) and, before any passenger uses aft‑facing seats for takeoff/landing, install Secretary‑approved head/back supports and then remove the placards. The rule imposes safety retrofit and short‑term capacity loss, with compliance and costs borne by the aircraft owner/operator."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hu-369-16-passenger-interior-modification","history":"/api/acts/ad-hu-369-16-passenger-interior-modification/history","analysis":"/api/acts/ad-hu-369-16-passenger-interior-modification/analysis","conflicts":"/api/acts/ad-hu-369-16-passenger-interior-modification/conflicts","importantCases":"/api/acts/ad-hu-369-16-passenger-interior-modification/important-cases","documents":"/api/acts/ad-hu-369-16-passenger-interior-modification/documents"}}