{"id":"F2017L00563","name":"AD/A320/77 Amdt 1 - Loral DFDR F800 Damping Rack Installation","slug":"ad-a320-77-amdt-1-loral-dfdr-f800-damping-rack-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":96336,"registerId":"commonwealth-F2017L00563-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Airbus A319, A320 and A321 Series Aeropl","sectionType":"part","heading":"Airbus A319, A320 and A321 Series Aeroplanes","content":"# Airbus A319, A320 and A321 Series Aeroplanes\n\n| AD/A320/77 Amdt 1 | Loral DFDR F800 Damping Rack Installation | 11/2017 |\n| ----------------- | ----------------------------------------- | ------- |\n\n| Applicability: | All Airbus A320 series aeroplanes, models -111, -211, -212, -231 and -232, equipped with a Loral Data Systems Digital Flight Data Recorder (DFDR) F800, without Airbus modification 24959 or Airbus Service Bulletin (SB) A320-31-1088 as in force from time to time incorporated.                                                         |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | Install a DFDR rack incorporating improved damping and reroute the cable harness in accordance with Airbus SB A320-31-1088 as in force from time to time.Note 1: This AD is based on DGAC AD 96-272-098(B)R1.Note 2: The words “as in force from time to time” require compliance with the most recent version of the referenced document. |\n| Compliance:    | Prior to 31 July 1998.Note 3: Previous compliance with any requirement in AD/A320/77 constitutes compliance with the same requirement in this AD.                                                                                                                                                                                          |\n|                | This AD commences on 26 May 2017.                                                                                                                                                                                                                                                                                                          |\n| Background:    | Airbus advised that under certain flight conditions the DFDR may not record all necessary data correctly. Actions specified by this Directive are designed to rectify this discrepancy.Amendment 1 is issued to clarify the AD applicability and update the DGAC AD reference to the latest revision.                                      |\n\n![](image.001.jpeg)\n\nPieter van Dijk  \nDelegate of the Civil Aviation Safety Authority\n\n18 May 2017","sortOrder":0},{"sectionNumber":"AD/A320/77 Amdt 1","sectionType":"part","heading":"AD/A320/77 Amdt 1","content":"## AD/A320/77 Amdt 1","sortOrder":1},{"sectionNumber":"Loral DFDR F800 Damping Rack Installatio","sectionType":"part","heading":"Loral DFDR F800 Damping Rack Installation","content":"## Loral DFDR F800 Damping Rack Installation","sortOrder":2},{"sectionNumber":"11/2017","sectionType":"part","heading":"11/2017","content":"## 11/2017","sortOrder":3}],"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment maintains the original scope. Amendment 1 only clarifies applicability language and updates a reference number; it does not expand the safety issue addressed or add new requirements beyond the original intent of ensuring proper DFDR function."},"complexity_factors":["Single, specific technical requirement with clear reference to external standard (Airbus Service Bulletin)","Narrow applicability criteria limited to specific aircraft models and equipment configurations","Only 2 defined technical terms requiring clarification (DFDR, SB)","No nested conditional logic or exceptions beyond standard applicability exclusions","Short document (approximately 250 words) with straightforward compliance pathway","Single cross-reference to French DGAC AD with updated revision number"],"plain_english_summary":"This CASA Airworthiness Directive mandates owners/operators of certain Airbus A319/A320/A321 (-111, -211, -212, -231, -232) fitted with a Loral F800 flight data recorder to install an improved DFDR mounting rack and reroute its wiring (unless Airbus mod 24959 or the Service Bulletin was already done).  \n\nIt fixes a vibration/mounting issue that can cause loss of flight-data capture, helping preserve critical information for investigations; Amendment 1 clarifies affected aircraft and aligns the French authority reference."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Amendment 1 clarifies applicability and updates the referenced DGAC AD to the latest revision but does not expand the substantive corrective action: the mandate to install the improved-damping DFDR rack and reroute the harness remains. The AD also confirms that previous compliance with the original AD satisfies this requirement (Background; Compliance Note 3)."},"complexity_factors":["External dependency: mandates compliance with Airbus Service Bulletin A320-31-1088 'as in force from time to time', creating an ongoing reference to an externally updated document (Requirement; Note 2).","Conditional applicability: applies only to aircraft fitted with a Loral DFDR F800 and without Airbus mod 24959 or prior incorporation of the SB, requiring operators to check modification status (Applicability).","Temporal contradiction: compliance date is 'prior to 31 July 1998' while the AD records commencement of 26 May 2017, creating interpretive and implementation uncertainty (Compliance).","Delegated technical detail: the AD directs installation per the Airbus SB rather than containing installation steps itself, shifting implementation detail to the manufacturer document (Requirement).","Inter-authority update: references and updates a DGAC AD revision and contains a clause that prior compliance satisfies the AD, which can complicate assessing whether further action is required (Background; Compliance Note 3).","Operator burden: cost and scheduling of the modification rest with aircraft operators, who must plan downtime and procurement to comply (Requirement/Compliance)."],"plain_english_summary":"This AD requires operators of Airbus A319/A320/A321 aeroplanes fitted with a Loral DFDR F800 (and without Airbus modification 24959 or SB A320‑31‑1088 incorporated) to install an improved-damping DFDR rack and reroute the cable harness per Airbus SB A320‑31‑1088. Operators must pay for and schedule the modification to restore reliable flight-data recording. Compliance required prior to 31 July 1998 (note: this date predates the amendment's commencement on 26 May 2017, indicating this is a re‑issued or clarified requirement; see source for full temporal context)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-a320-77-amdt-1-loral-dfdr-f800-damping-rack-installation","history":"/api/acts/ad-a320-77-amdt-1-loral-dfdr-f800-damping-rack-installation/history","analysis":"/api/acts/ad-a320-77-amdt-1-loral-dfdr-f800-damping-rack-installation/analysis","conflicts":"/api/acts/ad-a320-77-amdt-1-loral-dfdr-f800-damping-rack-installation/conflicts","importantCases":"/api/acts/ad-a320-77-amdt-1-loral-dfdr-f800-damping-rack-installation/important-cases","documents":"/api/acts/ad-a320-77-amdt-1-loral-dfdr-f800-damping-rack-installation/documents"}}