{"id":"F2011L01720","name":"AD/F100/30 Amdt 1 - Flight Warning Computer Replacement","slug":"ad-f100-30-amdt-1-flight-warning-computer-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":126204,"registerId":"commonwealth-F2011L01720-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Fokker F100 (F28 Mk 0070) Series Aeropla","sectionType":"division","heading":"Fokker F100 (F28 Mk 0070) Series Aeroplanes","content":"### Fokker F100 (F28 Mk 0070) Series Aeroplanes\n\n| AD/F100/30 Amdt 1 | Flight Warning Computer Replacement | 17/2011 |\n| ----------------- | ----------------------------------- | ------- |\n\n| Applicability: | All F28 Mk 0070 aeroplanes.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | Replace the Flight Warning Computer (FWC) with a modified unit, part number80-0610-3-45, in accordance with Fokker Service Bulletin (SB) F100-31-051 dated 15 August 1998.Modify the wiring in accordance with Fokker SB F100-31-047 Revision 1 dated21 March 1997.Note: Netherlands AD 1998-110 and EASA AD 2008-0090 refer.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |\n| Compliance:    | 1. Prior to 22 October 2001.2. Either concurrently with, or prior to Requirement 1.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |\n|                | This amendment becomes effective on 25 August 2011.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |\n| Background:    | In-service experience with Fokker 70 aircraft has shown that full transition to another flight phase could take up to eight seconds from the moment that all relevant input conditions are met. This may lead to alerts being generated during phases of flight where they should be suppressed. This directive introduces a new FWC that reduces the time delay between phases of flight to the lowest minimum attainable.The new computer also changes the flight phase inhibition definition of the REVERSER ENG 1(2) alerts so that these alerts are no longer inhibited during initial climb between 400 and 1000 ft radio altitude.Amendment 1 is issued to remove F28 Mk 100 aeroplane from the applicability as the AD requirement for this aeroplane type has been superseded by CASA AD/F100/89 (EASA AD 2008-0090) which requires FWC P/N 80-0610-3-45 to be replaced with P/N 80-0610-3-55 on all F28 Mk 100 aeroplanes. |\n\n|     | There is no change to the initial requirement of the AD. The initial issue of this Airworthiness Directive became effective on 22 April 1999. |\n| --- | --------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png)  \nMike Higgins  \nDelegate of the Civil Aviation Safety Authority\n\n23 August 2011","sortOrder":0},{"sectionNumber":"AD/F100/30 Amdt 1","sectionType":"part","heading":"AD/F100/30 Amdt 1","content":"## AD/F100/30 Amdt 1","sortOrder":1},{"sectionNumber":"Flight Warning Computer Replacement","sectionType":"part","heading":"Flight Warning Computer Replacement","content":"## Flight Warning Computer Replacement","sortOrder":2},{"sectionNumber":"17/2011","sectionType":"part","heading":"17/2011","content":"## 17/2011","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Amendment 1 removed the F28 Mk100 aeroplane from the applicability because that type is covered by a separate AD requiring a different FWC P/N; the original technical requirement for F28 Mk 0070 remains unchanged. The amendment thus narrowed the instrument's fleet scope while leaving the core replacement obligation intact (Background; Requirement)."},"complexity_factors":["Technical specificity: replacement of a safety‑critical avionics unit (FWC P/N 80-0610-3-45) requires certified parts and skilled technicians (Requirement).","Concurrent tasks: wiring modification must be done concurrently with, or before, the FWC replacement, coordinating work scope and scheduling (Requirement; Compliance).","Referenced materials: compliance depends on following external Fokker Service Bulletins (F100-31-051 and F100-31-047 Rev 1) and cross-referenced ADs (Requirement).","Regulatory timing: a fixed compliance deadline (22 October 2001) imposes scheduling and potential operational disruption (Compliance).","Applicability nuance: amendment removes a related aircraft subtype (F28 Mk100) from scope, requiring attention to fleet distinctions (Background)."],"plain_english_summary":"This directive requires fitting a modified Flight Warning Computer (FWC P/N 80-0610-3-45) and associated wiring changes to Fokker F100 (F28 Mk 0070) aeroplanes, carried out in accordance with Fokker Service Bulletins. It aims to reduce flight‑phase transition delay that can produce inappropriate alerts (Requirement; Background). Operators must complete the work by 22 October 2001, imposing maintenance cost, scheduled downtime and a technical installation burden; the amendment removes F28 Mk100 from applicability (Compliance; Background)."},"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":true,"description":"The scope has narrowed. The original 1999 directive applied to both F28 Mk 0070 (F100) and F28 Mk 0100 (F70) aircraft. This 2011 amendment removes the F70 from applicability because that aircraft type is now covered by a separate, newer directive (CASA AD/F100/89). The substantive safety requirement for F100 aircraft remains unchanged."},"complexity_factors":["Very short document (under 400 words)","Only 2 substantive requirements (computer replacement + wiring modification)","Single defined term (FWC = Flight Warning Computer)","Simple compliance structure with 2 sequential deadlines","No nested exceptions or conditional logic","Clear cross-reference to manufacturer service bulletins (SB F100-31-051 and SB F100-31-047)","Amendment logic is straightforward: remove F70 applicability, keep F100 requirement unchanged"],"plain_english_summary":"This AD mandates replacement of the Flight Warning Computer and associated wiring on Fokker F100 aircraft to fix an up-to-8‑second phase-switching delay that could cause spurious or missing cockpit warnings (including reverser warnings during initial climb). It applies to all F100s (compliance date was 22 Oct 2001). The 2011 amendment simply narrows scope by removing F70s—F100 requirements remain unchanged."}},"importantCases":[],"_links":{"self":"/api/acts/ad-f100-30-amdt-1-flight-warning-computer-replacement","history":"/api/acts/ad-f100-30-amdt-1-flight-warning-computer-replacement/history","analysis":"/api/acts/ad-f100-30-amdt-1-flight-warning-computer-replacement/analysis","conflicts":"/api/acts/ad-f100-30-amdt-1-flight-warning-computer-replacement/conflicts","importantCases":"/api/acts/ad-f100-30-amdt-1-flight-warning-computer-replacement/important-cases","documents":"/api/acts/ad-f100-30-amdt-1-flight-warning-computer-replacement/documents"}}