{"id":"F2006B07466","name":"AD/TPE 331/54 - Fuel Manifold","slug":"ad-tpe-331-54-fuel-manifold","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":49840,"registerId":"commonwealth-F2006B07466-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/TPE 331/54 - Fuel Manifold","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 106 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nAlliedSignal (Garrett/AiResearch) Turbine Engines \\- TPE 331 Series\n\nAD/TPE 331/54 Fuel Manifold 1/99\n\nApplicability: AlliedSignal TPE331-8, \\-10, \\-11, and \\-12 series turboprop engines with fuel manifold, Part Number (P/N) 3102469-1 or -2.\n\nRequirement: 1. Inspect fuel manifolds P/Ns 3102469-1 or \\-2, for the “Hoses Unlimited, Inc.” name on the manifold identification bands.\n\n2. Remove from service any fuel manifold, P/N 3102469-1 or -2 that has the “Hoses Unlimited, Inc.” name on the identification band and replace with a serviceable fuel manifold in accordance with the applicable AlliedSignal engine maintenance manual.\n\nNote 1: FAA AD 98-12-09 refers.\n\nCompliance: 1. At first access to the fuel manifolds, at the next hot section inspection, or 3 years after the effective date of this AD, whichever occurs first.\n\nNote 2: First access to the fuel manifold is defined as any repair, modification, removal, or testing of the fuel manifold assembly or components of the fuel manifold assembly.\n\n2. Before further flight following compliance with Requirement 1\\. This Airworthiness Directive becomes effective on 28 January 1999.\n\nBackground: Fuel manifold repairs carried out by Hoses Unlimited are not approved and could allow fuel leakage at the fuel manifold fittings, resulting in fuel spraying on hot turbine components, which could result in a fire.","sortOrder":0}],"analysis":{"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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Scope remains focused on removing specific, reportedly unapproved repairs to two fuel manifold part numbers on listed TPE331 variants. The instrument retains its original, narrowly targeted safety-remediation purpose (Applicability; Requirement; Background)."},"complexity_factors":["Narrow applicability to specific engine models and two part numbers (Applicability)","Simple pass/fail inspection criterion based on identification band text (Requirement 1)","Mandatory removal and replacement with a serviceable part per the engine maintenance manual — requires access to spare parts and maintenance resources (Requirement 2)","Multiple compliance triggers and a defined term for \"first access\" that creates scheduling choices (Compliance; Note 2)","Safety-critical consequence but limited regulatory discretion — prescriptive rather than standards-based (Requirement; Background)"],"plain_english_summary":"This Airworthiness Directive requires operators of AlliedSignal TPE331-8/ -10/ -11/ -12 engines with fuel manifold P/N 3102469-1 or -2 to inspect the manifold identification band for the name “Hoses Unlimited, Inc.” and to remove and replace any manifold so identified before further flight (Requirement 1; Compliance). The rule targets a specific, safety-related defect: unapproved repairs that the regulator says could cause fuel leaks and fire risk (Background). Operators pay inspection and replacement costs; the regulator sets the timing and acceptable procedure."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific manufacturing defect by a specific repair station. It remains tightly focused on its original purpose of identifying and removing unapproved fuel manifolds."},"complexity_factors":["Very short document (under 300 words)","Only 2 defined part numbers to identify","Single, straightforward inspection requirement with clear visual identifier (company name on band)","Simple compliance timeline with 3 alternative triggers (first access, hot section inspection, or 3-year deadline)","No cross-references to other legislation beyond a single note referencing the corresponding FAA directive","No nested conditions or exceptions"],"plain_english_summary":"This Airworthiness Directive orders operators of AlliedSignal TPE331-8, -10, -11, and -12 series engines to inspect fuel manifolds for the \"Hoses Unlimited, Inc.\" ID band and remove/replace any affected P/N 3102469-1 or -2 manifolds before further flight.  \n\nThe action responds to unapproved repairs by Hoses Unlimited that can cause fuel leaks and spray onto hot parts, creating a significant fire risk. Operators must inspect at the next convenient maintenance, hot section check, or within three years."}},"importantCases":[],"_links":{"self":"/api/acts/ad-tpe-331-54-fuel-manifold","history":"/api/acts/ad-tpe-331-54-fuel-manifold/history","analysis":"/api/acts/ad-tpe-331-54-fuel-manifold/analysis","conflicts":"/api/acts/ad-tpe-331-54-fuel-manifold/conflicts","importantCases":"/api/acts/ad-tpe-331-54-fuel-manifold/important-cases","documents":"/api/acts/ad-tpe-331-54-fuel-manifold/documents"}}