{"id":"F2006L01679","name":"AD/PHZL/82 Amdt 1 - Hub Certified Service Life","slug":"ad-phzl-82-amdt-1-hub-certified-service-life","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":59418,"registerId":"commonwealth-F2006L01679-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Propellers - Variable Pitch - Hartzell","sectionType":"division","heading":"Propellers - Variable Pitch - Hartzell","content":"### Propellers - Variable Pitch - Hartzell\n\n| AD/PHZL/82 Amdt 1 | Hub Certified Service Life | 7/2006 |\n| ----------------- | -------------------------- | ------ |\n\n| Applicability: | Hartzell Propeller Inc., Model HD-E6C-3B/E13890K propellers with D-5108-( ) hubs installed.Note 1: These propellers are installed on, but not limited to, Fairchild Dornier GmbH 328-100 series aeroplanes.Note 2: The parentheses indicate the presence or absence of an additional letter(s) which vary the basic propeller hub model designation. This AD still applies regardless of whether these letters are present or absent on the propeller hub model designation.                         |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Remove from service D-5108-( ) hubs and replace with a serviceable hub.2. Do not install any D- 5108-( ) hub that has accumulated 37,400 flight hours.Note 3: FAA AD 2003-04-01 Amdt 39-13049 refers.                                                                                                                                                                                                                                                                                             |\n| Compliance:    | 1. Before exceeding 37,400 flight hours.2. After the effective date of this AD.                                                                                                                                                                                                                                                                                                                                                                                                                      |\n|                | This Amendment becomes effective on 6 July 2006.                                                                                                                                                                                                                                                                                                                                                                                                                                                     |\n| Background:    | This AD requires the reduction of the original hub certified service (fatigue) life from unlimited hours to 37,400 flight hours. This amendment is prompted by a revaluation by Hartzell Propeller Inc. of the D-5108-( ) original hub service life certification calculations. The actions specified by this AD are intended to prevent fatigue failure of D-5108-( ) hubs, which may result in loss of aeroplane control.This amendment corrects a typographical error in Requirement 1 of the AD. |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n24 May 2006","sortOrder":0},{"sectionNumber":"AD/PHZL/82 Amdt 1","sectionType":"part","heading":"AD/PHZL/82 Amdt 1","content":"## AD/PHZL/82 Amdt 1","sortOrder":1},{"sectionNumber":"Hub Certified Service Life","sectionType":"part","heading":"Hub Certified Service Life","content":"## Hub Certified Service Life","sortOrder":2},{"sectionNumber":"7/2006","sectionType":"part","heading":"7/2006","content":"## 7/2006","sortOrder":3}],"analysis":{"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"},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"Yes. The amendment replaces an earlier 'unlimited' certified hub life with a capped service life of 37,400 flight hours, thereby expanding the set of hubs that must be retired by a specific hour limit. It applies to D-5108-( ) hubs installed on, but not limited to, Fairchild Dornier 328-100 series aeroplanes and was prompted by Hartzell Propeller Inc.'s revaluation of original certification calculations; it also corrects a typographical error in Requirement 1 (Applicability, Requirement, Background)."},"complexity_factors":["Single bright-line life limit (37,400 fh) simplifies compliance but requires accurate hour-tracking for each hub (Requirement, Compliance).","Applicability uses model variant parentheses (D-5108-( )) which can complicate hub identification for operators and maintenance personnel (Applicability).","Instruction to 'remove and replace with a serviceable hub' leaves 'serviceable' undefined in the text, creating potential interpretive burden for maintainers (Requirement).","Cross-reference to FAA AD 2003-04-01 adds an external regulatory dependency for technical context and possible procedures (Requirement note).","Amendment corrects a typographical error in Requirement 1, so implementers must reconcile versions and ensure they follow the corrected text (Background).","Compliance timing has two triggers (before exceeding hours; after effective date), so scheduling retirements requires coordination to avoid unintended overflight (Compliance)."],"plain_english_summary":"This amendment sets a firm fatigue service-life limit for Hartzell D-5108-( ) propeller hubs: 37,400 flight hours. Owners/operators must remove and replace any such hub before it surpasses that hour limit and must not install hubs that have already reached 37,400 hours; the AD took effect 6 July 2006. The change follows a Hartzell re‑evaluation and is intended to prevent fatigue failure that could lead to loss of aircraft control; replacement costs and logistics fall to operators/owners."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment maintains the original scope of AD/PHZL/82. It corrects a typographical error and confirms the reduced service life limit, but does not expand the directive to new aircraft types, hub models, or operational requirements beyond the original safety purpose."},"complexity_factors":["Single, specific mechanical component targeted (D-5108 hub series)","Only one numerical threshold to track (37,400 flight hours)","Two straightforward requirements: remove old hubs, don't install over-limit hubs","Minimal cross-referencing (one FAA AD mentioned in a note only)","No nested conditions, exceptions, or alternative compliance methods","Short document with clear applicability table"],"plain_english_summary":"This AD imposes a mandatory life limit of 37,400 flight hours on specific Hartzell propeller hubs (HD‑E6C‑3B/E13890K with D‑5108 hubs) used on certain aircraft, notably Fairchild Dornier 328‑100s, and prohibits installing hubs at or beyond that limit. It’s effective immediately (from 6 July 2006) after Hartzell revised fatigue life estimates to reduce the risk of catastrophic hub failure."}},"importantCases":[],"_links":{"self":"/api/acts/ad-phzl-82-amdt-1-hub-certified-service-life","history":"/api/acts/ad-phzl-82-amdt-1-hub-certified-service-life/history","analysis":"/api/acts/ad-phzl-82-amdt-1-hub-certified-service-life/analysis","conflicts":"/api/acts/ad-phzl-82-amdt-1-hub-certified-service-life/conflicts","importantCases":"/api/acts/ad-phzl-82-amdt-1-hub-certified-service-life/important-cases","documents":"/api/acts/ad-phzl-82-amdt-1-hub-certified-service-life/documents"}}