{"id":"F2005L01367","name":"AD/F100/66 - Wing Rear Spar Lower Girder","slug":"ad-f100-66-wing-rear-spar-lower-girder","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":35192,"registerId":"commonwealth-F2005L01367-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Fokker F100 (F28 Mk 100) Series Aeroplan","sectionType":"division","heading":"Fokker F100 (F28 Mk 100) Series Aeroplanes","content":"### Fokker F100 (F28 Mk 100) Series Aeroplanes\n\n| AD/F100/66 | Wing Rear Spar Lower Girder | 7/2005 |\n| ---------- | --------------------------- | ------ |\n\n| Applicability: | All Model F28 Mk 0070 and F28 Mk 0100 aircraft.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Inspect the wing rear spar lower girder between STA 8700 and STA 9200, in accordance with Part 1 of Section 3 Accomplishment Instructions of Fokker Services Service Bulletin (SB) F100-57-038, dated 15 April 2005, or laterCAA-NL approved revision.2. If corrosion is found, remove the corrosion in accordance with Part 2 of Section 3 Accomplishment Instructions of SB F100-57-038, or later CAA-NL approved revision. Measure the damage and if the damage limits are not exceeded, the aircraft may be returned to service after restoration of the surface protection.3. If damage limits are exceeded, contact Fokker Services and repair in accordance with the repair advice as provided by Fokker Services.4. Irrespective of the results, report all findings to Fokker Services.Note: Netherlands CAA AD NL-2005-006 refers. |\n| Compliance:    | 1. At the next scheduled or unscheduled maintenance check within 4,000 flight hours after 7 July 2005, but not later than 15 April 2007.2. Before further flight.3. Before further flight.4. Within 7 days after the inspection.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |\n|                | This Airworthiness Directive becomes effective on 7 July 2005.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |\n\n| Background: | The Netherlands CAA received reports of corrosion of the wing spar lower girder between wing stations STA 8700 and STA 9200. Such corrosion, if undetected, could lead to deterioration of the structural strength of the wing rear spar. |\n| ----------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n19 May 2005","sortOrder":0},{"sectionNumber":"AD/F100/66","sectionType":"part","heading":"AD/F100/66","content":"## AD/F100/66","sortOrder":1},{"sectionNumber":"Wing Rear Spar Lower Girder","sectionType":"part","heading":"Wing Rear Spar Lower Girder","content":"## Wing Rear Spar Lower Girder","sortOrder":2},{"sectionNumber":"7/2005","sectionType":"part","heading":"7/2005","content":"## 7/2005","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, targeted airworthiness directive addressing a specific safety issue (corrosion in a particular aircraft component). The scope remains precisely limited to the identified safety risk and affected aircraft models."},"complexity_factors":["Single, specific technical requirement (one inspection location)","Only 4 compliance items with clear sequential logic","References external technical document (Fokker Service Bulletin) but provides specific identification","Minimal defined terms (only aircraft model designations and structural station references)","No nested exceptions or conditional cross-referencing within the instrument itself","Straightforward timeline: one deadline for inspection, immediate action for repairs"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's aviation regulator (CASA) requiring specific inspections or repairs to aircraft.\n\n**What it does:**\nOrders owners and operators of **Fokker F100 aircraft** (also known as F28 Mk 0070 and F28 Mk 0100 models) to inspect a critical part of the wing — specifically the **rear spar lower girder** (a structural beam that helps hold the wing together) — for **corrosion** (rust or chemical damage to metal).\n\n**Who it affects:**\nAnyone who owns, operates, or maintains these specific Fokker aircraft in Australia.\n\n**What must happen:**\n- **Inspect** the wing structure between two specific points (STA 8700 and STA 9200) following Fokker's official service bulletin\n- **If corrosion is found:** remove it, measure the damage, and either repair it or return the aircraft to service if within safe limits\n- **If damage is too severe:** contact Fokker for repair instructions before flying again\n- **Report all findings** to Fokker Services within 7 days\n\n**When:**\nThe inspection must happen within 4,000 flight hours after 7 July 2005, but no later than 15 April 2007. Any corrosion found must be addressed before the aircraft flies again.\n\n**Why it matters:**\nCorrosion in this structural component could weaken the wing and potentially cause structural failure. This AD prevents accidents by catching the problem early."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD is narrowly targeted to a single safety issue: corrosion in the wing rear spar lower girder on specified Fokker F28 Mk 0070 and Mk 0100 models. The requirements (inspect, remove corrosion, measure, repair if limits exceeded, report) and the referenced Service Bulletin are all directly tied to that stated purpose. The instrument does not extend regulatory obligations beyond that original, stated safety scope (no additional models, no broader inspection regimes, no new certification or operational restrictions beyond required repairs and reporting)."},"complexity_factors":["Short, single‑issue directive focused on corrosion of one structural area (wing rear spar lower girder between STA 8700 and STA 9200)","Four required actions (inspect; remove corrosion and measure; contact OEM and repair if limits exceeded; report findings)","Two external document references: Fokker Services Service Bulletin F100-57-038 (Part 1 & Part 2 of Section 3) and CAA‑NL approved revisions","Compliance timing has one numerical window (within 4,000 flight hours or by a calendar date) plus immediate-before‑flight requirements for repairs","One conditional branch: actions differ depending on whether corrosion is found and whether damage limits are exceeded","Mandated OEM involvement for repair advice (requires contacting Fokker Services) and mandatory reporting within 7 days"],"plain_english_summary":"This instrument mandates an inspection of the wing rear spar lower girder on all Fokker F28 Mk 0070 and Mk 0100 aeroplanes for corrosion, removal and measurement of any corrosion found, and repair where damage exceeds specified limits using Fokker Services’ advice. Operators and maintenance organisations must report findings to Fokker within seven days. Inspection must occur within 4,000 flight hours after 7 July 2005 or by 15 April 2007; repairs that exceed limits must be completed before further flight."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-f100-66-wing-rear-spar-lower-girder","history":"/api/acts/ad-f100-66-wing-rear-spar-lower-girder/history","analysis":"/api/acts/ad-f100-66-wing-rear-spar-lower-girder/analysis","conflicts":"/api/acts/ad-f100-66-wing-rear-spar-lower-girder/conflicts","importantCases":"/api/acts/ad-f100-66-wing-rear-spar-lower-girder/important-cases","documents":"/api/acts/ad-f100-66-wing-rear-spar-lower-girder/documents"}}