{"id":"F2006B10202","name":"AD/GAF-N22/54 - D.C. Power - Generator Cable Termination","slug":"ad-gaf-n22-54-d-c-power-generator-cable-termination","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55860,"registerId":"commonwealth-F2006B10202-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/GAF-N22/54 - D.C. Power - Generator Cable Termination","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nGAF N22 and N24 Series Aeroplanes\n\nAD/GAF-N22/54 D.C. Power \\- Generator Cable Termination 10/89 T\n\nApplicability: All Nomad N22 and N24 series aircraft. Requirement: 1. Inspection of Cable Terminations.\n\n    Gain access to the generator cable connections at both ends of stud P/N-I/N-81- 424, passing through the firewall in the wing leading edge (refer IPC Chap. 71- 50-00 Fig. 1, Item 23).\n\nNote: It will be necessary to raise the upper engine cowls and the wing leading edge servicing doors to gain access.\n\n    b. Pull back the protective covers from the cable-to-stud connections, and inspect all components for signs of damage due to overheating resulting from high electrical resistance in the termination. Check also for security of attachment of the cable to the stud, at each side of the firewall.\n\n    c. If evidence of overheating is apparent, all damaged components must be replaced.\n\n2. Application of Warning Placard.\n\na. Manufacture and affix a temporary placard to the generator control panel on the overhead console, with the following text:\n\nMAXIMUM SINGLE GENERATOR CURRENT NOT TO EXCEED 75 AMPS.\n\nNote 1: Incorporation of Mod N724 (Part 3 of ASB ANMD-24-5 R1) constitutes terminating action for the requirements of this A.D.\n\nNote 2: Nomad ASB ANMD-24-5 R1 refers.\n\nCompliance: Requirement 1.\n\n    Aircraft whose total electrical load exceeds 150 amps \\- Before next flight after 21 August 1989, and thereafter before each flight until mod N724 is incorporated.\n\n    b. Aircraft whose total electrical load does not exceed 150 amps \\- Prior to exceeding 100 hours time in service from 21 August 1989.\n\nRequirement 2.\n\n    Aircraft whose total electrical load exceeds 150 amps \\- Before next flight after 21 August 1989.\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n    b. Aircraft whose total electrical load does not exceed 150 amps \\- Prior to exceeding 100 hours time in service after 21 August 1989.\n\nBackground: ASTA have advised severe damage and over heating has occurred at the generator firewall terminal lug which may affect safety of flight.","sortOrder":0}],"analysis":{"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 Airworthiness Directive maintains its original narrow scope — addressing a specific electrical safety defect in GAF Nomad aircraft. It has not expanded beyond its initial purpose of mandating inspection and temporary operating limitations for generator cable terminations."},"complexity_factors":["Single technical subject matter (electrical cable termination) with straightforward inspection requirements","Two-tier compliance schedule based on electrical load threshold (150 amps) creating conditional logic","Cross-reference to external technical documents (IPC Chap. 71-50-00, Mod N724, ASB ANMD-24-5 R1) that are not reproduced in the text","Specific part numbers referenced (stud P/N-I/N-81-424) requiring technical manual lookup","No defined terms section or interpretation provisions","Clear structure with numbered requirements and sub-paragraphs (1a, 1b, 1c, 2a, 2b)"],"plain_english_summary":"This Airworthiness Directive from CASA for GAF Nomad N22/N24 aircraft requires immediate action to address overheating generator cable connections at the firewall that create a fire and electrical-failure risk. It mandates inspection, replacement if damage is found, and a temporary placard limiting single-generator current until a permanent modification is fitted.\n\nIt affects all Nomads but imposes earlier, pre-flight compliance for high‑electrical‑load aircraft and a short-term timetable for lower‑load aircraft — critical to prevent in‑flight fires or loss of electrical systems."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD stays within the original safety-focused purpose described in the background (addressing overheating/damage at the generator firewall terminal lug). It requires inspection, repair, and a temporary placard, and points to a specific terminating modification (Mod N724). The instrument does not add functions or obligations beyond remediating the overheating risk and managing interim operational constraints, so the scope has not grown beyond that original intent."},"complexity_factors":["Short, single-aircraft-type applicability (Nomad N22 and N24)","2 primary mandatory requirements (inspection and placard)","Conditional compliance timing with 2 load-based branches (>150 A and ≤150 A)","Reference to a terminating modification (Mod N724) and an external service bulletin (ASB ANMD-24-5 R1)","Simple inspection steps but requires physical access (cowls and servicing doors)","No layered exceptions or complex penalty/appeal procedures"],"plain_english_summary":"**What this directive does (mechanically)**\n\n- Applies to all GAF Nomad N22 and N24 series aircraft. (Applicability)\n- Requires a physical inspection of the generator cable terminations that pass through the firewall on the wing leading edge (detailed steps under Requirement 1):\n  - Gain access by raising the upper engine cowls and wing leading edge servicing doors.\n  - Pull back protective covers on both cable-to-stud connections for stud P/N-I/N-81-424 and inspect for signs of overheating or loose attachment (inspect both sides of the firewall).\n  - Replace any components that show evidence of overheating. (Requirement 1)\n- Requires a temporary warning placard on the generator control panel stating: “MAXIMUM SINGLE GENERATOR CURRENT NOT TO EXCEED 75 AMPS.” (Requirement 2)\n- Compliance timing is conditional on the aircraft’s total electrical load:\n  - If the aircraft’s total electrical load exceeds 150 amps: the inspection and placard must be done before the next flight after 21 August 1989, and the inspection must be repeated before each flight until Mod N724 is incorporated. (Requirement 1 & 2)\n  - If the aircraft’s total electrical load does not exceed 150 amps: the inspection must be done before the aircraft exceeds 100 hours time in service after 21 August 1989; the placard must be fitted before that same 100-hour threshold. (Requirement 1.b & Requirement 2.b)\n- Incorporation of modification N724 (Part 3 of ASB ANMD-24-5 R1) is identified as terminating action for the AD — once Mod N724 is installed, these AD requirements are no longer necessary for that aircraft. (Note 1)\n- The AD refers operators to Nomad Service Bulletin ASB ANMD-24-5 R1 for further details. (Note 2)\n\n**Why it matters (official rationale and practical effect)**\n\n- The background states that severe damage and overheating occurred at the generator firewall terminal lug and that this may affect safety of flight. The AD’s mechanically targeted actions (inspection, replacement of damaged parts, and a current-limiting placard) are intended to detect and mitigate that overheating risk while operators either carry out inspections or incorporate the terminating modification. (Background; Requirement 1 & 2)\n\n**Who is affected and who pays/decides**\n\n- Affected parties: owners and operators of Nomad N22 and N24 aircraft, maintenance organisations and engineers who perform the inspections or modifications. (Applicability; Requirement 1)\n- Who pays: the aircraft owner/operator pays for access (removing cowls/doors), inspection labour, replacement parts if damage is found, installation of the placard, and ultimately the cost of Mod N724 if chosen. (Requirement 1 & Note 1)\n- Who decides/complies: the operator is required to comply with the AD; maintenance providers carry out the work to airworthiness standards. The Civil Aviation Safety Authority (CASA) enforces the AD as part of the airworthiness framework. (AD structure)\n\n**Behavioral and market effects, trade-offs and risks**\n\n- Immediate operational constraint: operators with higher electrical loads (>150 A) must act before the next flight, possibly grounding an aircraft until inspection is done. This creates short-term downtime and scheduling consequences. (Requirement 1 & Compliance timing)\n- Recurring inspection burden: until Mod N724 is installed, affected aircraft with >150 A loads must be inspected before each flight, imposing ongoing labour and time costs; operators face an incentive to install Mod N724 to remove repeated inspections. (Requirement 1 compliance schedule; Note 1)\n- Safety mitigation vs. cost: replacing damaged terminations reduces risk of in-flight electrical failure but has direct part and labour costs. The placard imposes a hard operating limit (75 A single-generator current) that may force operational changes (e.g., shedding electrical loads or using alternate power arrangements) until the mod is fitted. (Requirement 2)\n- Implementation risk: inspections rely on access and visual assessment; subtle or internal damage could be missed, producing residual risk unless components are replaced or Mod N724 is installed. (Requirement 1 inspection steps)\n- Concentration of benefits and costs: the safety benefit is concentrated on operators of the Nomad N22/N24 fleet; the cost burden is likewise concentrated on those same operators and their maintenance providers. There is no broad market-wide change to competition or ownership beyond these operators choosing whether/when to fit the terminating mod.\n\n**Concrete mechanisms that change behaviour**\n\n- Short-term operational constraint: immediate inspection and placard requirements for high-load aircraft force prompt action by operators. (Compliance)\n- Incentive to invest: identification of Mod N724 as terminating action creates a clear financial choice—pay recurring inspection and potential grounding costs, or pay once to install the mod and remove the recurring obligation. (Note 1)\n\n**References to the AD text**\n\n- Inspection and replacement requirement: Requirement 1.\n- Placard requirement and text: Requirement 2.\n- Compliance timing based on total electrical load: Compliance section under Requirement 1 and Requirement 2.\n- Terminating action: Note 1 (Mod N724 / ASB ANMD-24-5 R1)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-gaf-n22-54-d-c-power-generator-cable-termination","history":"/api/acts/ad-gaf-n22-54-d-c-power-generator-cable-termination/history","analysis":"/api/acts/ad-gaf-n22-54-d-c-power-generator-cable-termination/analysis","conflicts":"/api/acts/ad-gaf-n22-54-d-c-power-generator-cable-termination/conflicts","importantCases":"/api/acts/ad-gaf-n22-54-d-c-power-generator-cable-termination/important-cases","documents":"/api/acts/ad-gaf-n22-54-d-c-power-generator-cable-termination/documents"}}