{"id":"F2007L03973","name":"AD/F100/82 Amdt 1 - Piccolo Tube Peri-Seals","slug":"ad-f100-82-amdt-1-piccolo-tube-peri-seals","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":70690,"registerId":"commonwealth-F2007L03973-current","compilationNumber":null,"startDate":"2026-04-02","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/F100/82 Amdt 1 | Piccolo Tube Peri-Seals | 11/2007 |\n| ----------------- | ----------------------- | ------- |\n\n| Applicability: | Fokker Aircraft B.V. Model F28 Mark 0070 and Mark 0100 aircraft, all serial numbers, unless modified per Fokker Service Bulletin SBFI00-30-022. |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement: | 1. Inspect the Piccolo Tubes and their surrounding area and replace the Peri-seals in accordance with Part 3 Accomplishment Instructions of Fokker Service Bulletin SBF100-30-028 dated 18 May 2006 or a later NAA approved revision.2. Do not install a spare wing leading edge section on any of the aircraft affected by this directive, unless it has been modified in accordance with CSBD14000-57-007 or a later NAA approved revision.Note: EASA AD 2007-0229 dated 25 August 2007 refers. This AD supersedesCAA-NL AD NL-2006-011. |\n| Compliance: | 1. Remains unchanged as: Within the next 4,000 flight hours or 24 calendar months after the effective date of 23 November 2006 (the original issue of this AD), whichever occurs first, unless previously accomplished.2. From 15 August 2008. |\n| | This Amendment becomes effective on 25 October 2007. |\n| Background: | In 1997, Fokker introduced a new type of Peri-seal (SBF100-30-022). The old type was known to be subject to deterioration, which, in combination with improper installation, can cause leakage of hot wing anti-icing air from the Peri-seal housing. This results in an uncontrolled flow of high-pressure hot air to enter the forward (anti-icing) plenum chamber of the wing leading edge, potentially damaging the anti-icing barrier webs. Subsequently, the wing auxiliary spar can also be damaged by high-pressure hot air. Analysis at the time showed that any resulting damage (known to occur at inboard positions only) would not affect the wing load capability. For this reason, the modification was not classified as MANDATORY and no AD action was warranted. However, through a recent occurrence, it was discovered that deterioration of the Peri-seals enables the piccolo tubes to vibrate, resulting in a broken piccolo tube. In this case, the location of the failure was more outboard than previous occurrences. This condition, if not corrected, may cause heat damage to the front spar that potentially affects the wing’s load capability. |\n\n| | Since an unsafe condition has been identified that is likely to exist or develop on aircraft of this type design, this Airworthiness Directive requires inspection of the Piccolo Tubes and the surrounding structure to establish correct installation, as well as the replacement of the 460-series Peri-seals by the improved 600-series, which have a higher temperature limit. A new MRB task will be introduced to require the repetitive replacement (life limit) of the new Pen-seals to prevent long-term degradation.Since the issuance of original issue of this AD, Fokker has developed a modification, published as Component Service Bulletin (CSB) D14000-57-007, for spare wing leading edge sections that may still contain the 460-series Peri-seals. For that reason, this AD retains the requirements of AD NL-2006-011 and adds a limit for the allowed use of unmodified wing leading edge section as replacement part.The original issue of this AD became effective on 23 November 2006. |\n| --- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png) \nCharles Lenarcic \nDelegate of the Civil Aviation Safety Authority\n\n10 September 2007","sortOrder":0},{"sectionNumber":"AD/F100/82 Amdt 1","sectionType":"part","heading":"AD/F100/82 Amdt 1","content":"## AD/F100/82 Amdt 1","sortOrder":1},{"sectionNumber":"Piccolo Tube Peri-Seals","sectionType":"part","heading":"Piccolo Tube Peri-Seals","content":"## Piccolo Tube Peri-Seals","sortOrder":2},{"sectionNumber":"11/2007","sectionType":"part","heading":"11/2007","content":"## 11/2007","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":true,"description":"This amendment retains the original inspection and replacement requirement but expands scope by adding a prohibition on installing unmodified spare wing leading‑edge sections (Requirement) and by introducing a repetitive replacement (life‑limit) MRB task to prevent long‑term Peri‑seal degradation (Background). It supersedes the prior AD NL‑2006‑011 and thus narrows permitted spare‑part use while making the improved Peri‑seal replacement a continuing maintenance obligation."},"complexity_factors":["Technical maintenance action on wing anti‑ice system components (piccolo tubes and Peri‑seals) requiring specific parts and installation standards (Requirement; Background).","Multiple external documents and approvals referenced: Fokker Service Bulletin SBF100‑30‑028, CSBD14000‑57‑007, and NAA‑approved revisions (Requirement; Applicability).","Time/usage compliance window (4,000 flight hours or 24 months) and effective dates set by the regulator, creating scheduling and operational constraints (Compliance).","Introduction of a repetitive replacement (life‑limit) MRB task to prevent long‑term degradation, implying ongoing maintenance and recordkeeping obligations (Background).","Applicability to all serial numbers except those already modified increases administrative tracking to identify exempted airframes (Applicability).","Prohibition on installing certain spare parts unless modified imposes parts‑management and supply‑chain impacts for operators and MROs (Requirement)."],"plain_english_summary":"This Airworthiness Directive requires operators of Fokker F28 Mark 0070 and Mark 0100 (F100) aircraft to inspect piccolo tubes and replace 460‑series Peri‑seals with improved 600‑series Peri‑seals per Fokker Service Bulletin SBF100‑30‑028, and bans fitting spare wing leading‑edge sections unless modified per CSBD14000‑57‑007 (Requirement; Applicability). Operators must comply within 4,000 flight hours or 24 months from the original AD date and follow the stated effective dates (Compliance)."},"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"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment remains tightly focused on its original purpose: addressing Peri-seal deterioration in Fokker F100 aircraft. The amendment adds one additional requirement (restrictions on spare wing leading edge sections) that directly supports the original safety goal. This is a natural evolution rather than scope creep."},"complexity_factors":["Short, single-purpose directive focused on one specific mechanical issue","Only 2 main requirements with clear cross-references to manufacturer service bulletins","Simple compliance timeline with two alternative deadlines","Technical terminology is explained in the background section (Peri-seals, Piccolo Tubes, plenum chamber)","Limited conditional logic — mainly applicability exclusions for already-modified aircraft","No nested definitions or extensive interpretation sections"],"plain_english_summary":"This CASA Airworthiness Directive mandates that operators of Fokker F100 (F28 Mk 0070/0100) inspect Piccolo Tubes and seals in the wing anti‑icing system, replace old Peri‑seals with improved heat‑resistant seals, and refrain from using unmodified spare leading edge sections. Deteriorating seals can leak hot air, cause tube vibration/breakage, and risk spar damage—an unsafe condition. Compliance is required within 4,000 flight hours or 24 months from 23 Nov 2006 (with some tasks by 15 Aug 2008)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-f100-82-amdt-1-piccolo-tube-peri-seals","history":"/api/acts/ad-f100-82-amdt-1-piccolo-tube-peri-seals/history","analysis":"/api/acts/ad-f100-82-amdt-1-piccolo-tube-peri-seals/analysis","conflicts":"/api/acts/ad-f100-82-amdt-1-piccolo-tube-peri-seals/conflicts","importantCases":"/api/acts/ad-f100-82-amdt-1-piccolo-tube-peri-seals/important-cases","documents":"/api/acts/ad-f100-82-amdt-1-piccolo-tube-peri-seals/documents"}}