{"id":"F2006B02689","name":"AD/B727/166 - Argo-Tech/TRW Fuel Boost Pumps","slug":"ad-b727-166-argo-tech-trw-fuel-boost-pumps","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42005,"registerId":"commonwealth-F2006B02689-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.002.png)\n\n![](image.002.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.","sortOrder":0},{"sectionNumber":"AD/B727/166 Argo-Tech/TRW Fuel Boost Pum","sectionType":"part","heading":"AD/B727/166 Argo-Tech/TRW Fuel Boost Pumps 2/2000","content":"# AD/B727/166 Argo-Tech/TRW Fuel Boost Pumps 2/2000\n\nDM\n\nApplicability: Model 727-100 and -200 series aeroplanes equipped with Argo-Tech/TRW (Thompson Ramo Wooldbridge) fuel tank boost pumps having part numbers (P/N) 258000-2, -3, and -5, or 382300-1, -2, and -3.\n\nRequirement: 1. Unless accomplished previously, perform a one-time detailed visual inspection to detect discrepant breather plugs (including loose, damaged, and missing plugs) in the fuel tank boost pumps in accordance with Boeing Telex M-7200-98-03173, dated 21 October 1998 or Boeing Alert Service Bulletin 727-28A0125, Revision 1, dated 10 June 1999.\n\nNote 1: For the purposes of this directive, a detailed visual inspection is defined as: \"An intensive visual examination of a specific structural area, system, installation, or assembly to detect damage, failure, or irregularity. Available lighting is normally supplemented with a direct source of good lighting at intensity deemed appropriate by the inspector. Inspection aids such as mirror, magnifying lenses etc, may be used. Surface cleaning and elaborate access procedures may be required.\"\n\n    2. If any discrepancy is detected, during the Requirement 1 inspection, either install a new breather plug in accordance with Temporary Revision No. 28-1 of the Argo- Tech Overhaul Manual, dated 13 November 1998, or the alert service bulletin; or replace the boost pump with a new or serviceable pump, in accordance with procedures specified in Section 28-22-21 of the Boeing 727 Airplane Maintenance Manual (AMM). After the effective date of this directive, only Section 28-22-21 of the Boeing 727 AMM, dated 20 January 1999, shall be used for replacement of the boost pump.\n\n    3. No person shall install an Argo-Tech/TRW fuel tank boost pump having the P/N 258000-2, \\-3, or \\-5; or 382300-1, \\-2, or \\-3 on any aeroplane; unless that pump has been inspected and applicable corrective actions have been performed in accordance with the requirements of this directive.\n\nNote 2: FAA AD 99-24-06 Amdt 39-11430 refers.","sortOrder":1}],"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":true,"description":"This AD converts inspection and corrective guidance into mandatory requirements for the listed pumps and airplane models (Requirement 1–3). It imposes a one‑time inspection, prescribes corrective actions and explicitly forbids installing the listed P/Ns unless inspected and remediated. It also mandates use of a specific Boeing AMM version for pump replacement after the effective date (Requirement 2). These elements tighten prior maintenance options by making inspection, corrective action, and a specific replacement procedure compulsory."},"complexity_factors":["Narrow applicability by model and explicit pump part numbers (Applicability).","Single mandatory action (one‑time detailed visual inspection) but with a technically specific inspection definition (Requirement 1; Note 1).","Multiple corrective options required depending on findings (install breather plug per Argo‑Tech manual or replace pump per Boeing AMM) increasing operational choices (Requirement 2).","Dependency on external documents and dated revisions (Boeing Telex M‑7200‑98‑03173; Boeing Alert Service Bulletin 727‑28A0125 Rev 1; Temporary Revision No. 28‑1 of Argo‑Tech Overhaul Manual; Boeing 727 AMM Section 28‑22‑21 dated 20 Jan 1999) — compliance requires access to and use of those specific documents (Requirement 1–2).","Post‑effective‑date constraint requiring a specific AMM version for replacement adds a temporal compliance rule (Requirement 2).","Prohibition on installing listed pumps unless inspected and corrected creates an ongoing parts‑control/compliance obligation for installers and supply chains (Requirement 3)."],"plain_english_summary":"Requires operators of Boeing 727‑100/‑200 aeroplanes fitted with specified Argo‑Tech/TRW fuel boost pumps (listed P/Ns) to perform a one‑time detailed visual inspection for loose, damaged or missing breather plugs. If discrepancies are found, the directive requires installing a new breather plug or replacing the pump per the cited Boeing/Argo‑Tech manuals, and forbids installing those pump P/Ns unless inspected and corrected. It affects aircraft operators, maintenance organisations and parts installers and addresses an identified unsafe condition."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains its original narrow scope: addressing a specific unsafe condition in specific fuel pump models on specific aircraft types. The requirements remain tightly focused on inspection and replacement of breather plugs, with no expansion into broader operational or maintenance areas."},"complexity_factors":["Short, single-purpose directive with clear applicability section","Only 3 main requirements with straightforward conditional logic (if discrepancy found, then repair or replace)","4 defined terms or references: 'detailed visual inspection' (explicitly defined in Note 1), specific Boeing technical documents (Telex, Service Bulletin, Maintenance Manual), and Argo-Tech Overhaul Manual","Minimal cross-referencing: references to external technical documents rather than internal legislative cross-references","Single exception/nested condition: Requirement 2 branches based on inspection findings, but structure remains simple","Clear compliance timeline implied ('one-time' inspection, 'after the effective date' for manual version)"],"plain_english_summary":"This CASA safety order requires owners and operators of Boeing 727-100/200 aircraft fitted with certain Argo‑Tech/TRW fuel boost pumps to perform a one‑time detailed inspection for missing or faulty breather plugs and to fit replacement plugs or replace pumps if defects are found. It also bans installing the specified pump models unless the inspection and corrective actions have been completed.\n\nThe measure addresses fuel‑leak and fire risks from faulty breather plugs and aligns with FAA AD 99‑24‑06."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b727-166-argo-tech-trw-fuel-boost-pumps","history":"/api/acts/ad-b727-166-argo-tech-trw-fuel-boost-pumps/history","analysis":"/api/acts/ad-b727-166-argo-tech-trw-fuel-boost-pumps/analysis","conflicts":"/api/acts/ad-b727-166-argo-tech-trw-fuel-boost-pumps/conflicts","importantCases":"/api/acts/ad-b727-166-argo-tech-trw-fuel-boost-pumps/important-cases","documents":"/api/acts/ad-b727-166-argo-tech-trw-fuel-boost-pumps/documents"}}