{"id":"F2006B08961","name":"AD/DH114/49 - Flap To Flap Jack Connecting Pin","slug":"ad-dh114-49-flap-to-flap-jack-connecting-pin","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52535,"registerId":"commonwealth-F2006B08961-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DH114/49 - Flap To Flap Jack Connecting Pin","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  DH114 (Heron) Series Aeroplanes\n\n \n\nAD/DH114/49 Flap To Flap Jack Connecting Pin 1/89\n\nDM\n\n \n\nApplicability: All models.\n\n \n\nRequirement: Action in accordance with BAe TNS CF-20 Issue 1. Compliance:  Within seven days time in service after 7 December 1988.\n\nBackground: Incorrectly manufactured connecting pins have been found in service, one of which caused an in-flight asymmetric flap condition.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive addressing a specific manufacturing defect in a specific aircraft part. It has not expanded beyond its original purpose of grounding/remediating faulty flap connecting pins."},"complexity_factors":["Single, specific mechanical component addressed","Clear, unambiguous compliance deadline (7 days time-in-service after fixed date)","No defined terms section — common aviation terminology used","Single cross-reference to external technical document (BAe TNS CF-20)","No conditional logic, exceptions, or nested provisions","Extremely short — approximately 100 words of substantive content"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it does:**\nOrders owners and operators of **de Havilland DH114 Heron series aeroplanes** to inspect and replace a specific part — the **flap-to-flap jack connecting pin** — within seven days of flying time after 7 December 1988.\n\n**Why it matters:**\nSome of these connecting pins were manufactured incorrectly. One faulty pin already caused an **in-flight asymmetric flap condition** — meaning the flaps (the moving surfaces on the wings that help control lift during takeoff and landing) extended unevenly on one side. This creates a serious risk of loss of control.\n\n**Who must comply:**\nAnyone operating any model of the DH114 Heron aircraft.\n\n**How to comply:**\nFollow the technical instructions in **BAe TNS CF-20 Issue 1** — a service bulletin from British Aerospace detailing the required inspection and replacement procedure."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument applies to all DH114 (Heron) models and requires the actions specified in BAe TNS CF-20 Issue 1 within a seven-day window. The text supplied contains no indication that the applicable fleet, the component targeted, or the remedial scope was altered from the directive's stated purpose to address incorrectly manufactured connecting pins. Therefore there is no apparent change of scope from the instrument's original stated intent (Applicability; Requirement; Background; Compliance)."},"complexity_factors":["Short, clear applicability clause: applies to all DH114 (Heron) models (Applicability).","Requirement delegates technical detail to an external document (BAe TNS CF-20 Issue 1), so users must obtain and follow that separate technical procedure (Requirement).","Tight statutory compliance deadline — seven days time in service after 7 December 1988 — raises logistical complexity for operators (Compliance).","Safety-critical subject matter (flap-to-flap jack connecting pin) increases urgency and constrains operational options, though the AD itself is brief (Background)."],"plain_english_summary":"The Civil Aviation Safety Authority requires all operators of DH114 (Heron) aeroplanes to follow BAe TNS CF‑20 Issue 1 to inspect and, and where necessary, remove or replace suspect flap‑to‑flap jack connecting pins within seven days of 7 December 1988.\n\nOperators bear inspection, parts and labour costs and possible downtime; the directive targets a specific manufacturing defect after one pin caused an in‑flight asymmetric flap and is intended to preserve flight safety."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dh114-49-flap-to-flap-jack-connecting-pin","history":"/api/acts/ad-dh114-49-flap-to-flap-jack-connecting-pin/history","analysis":"/api/acts/ad-dh114-49-flap-to-flap-jack-connecting-pin/analysis","conflicts":"/api/acts/ad-dh114-49-flap-to-flap-jack-connecting-pin/conflicts","importantCases":"/api/acts/ad-dh114-49-flap-to-flap-jack-connecting-pin/important-cases","documents":"/api/acts/ad-dh114-49-flap-to-flap-jack-connecting-pin/documents"}}