{"id":"F2007L02119","name":"AD/G1159/48 - Roll Axis Hardover Protection System","slug":"ad-g1159-48-roll-axis-hardover-protection-system","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":67246,"registerId":"commonwealth-F2007L02119-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Gulfstream (Grumman) G1159 and G-IV Seri","sectionType":"division","heading":"Gulfstream (Grumman) G1159 and G-IV Series Aeroplanes","content":"### Gulfstream (Grumman) G1159 and G-IV Series Aeroplanes\n\n| AD/G1159/48 | Roll Axis Hardover Protection System | 8/2007 |\n| ----------- | ------------------------------------ | ------ |\n\n```html\n

Applicability:

Gulfstream Aerospace Corporation model/series aeroplanes as follows:

Mode/Series

GV
GV-SP

Serial Numbers

674 through 693 inclusive
5001 through 5072 inclusive

Requirement:

1. If not previously accomplished, repair the force link assembly wire harness by doing all actions specified in the Accomplishment Instructions of the applicable service information identified in Table 1 of this Directive.

Table 1

Model

Service Information

GV-SP series

Gulfstream G500 Customer Bulletin 14, dated 13 June 2005

GV-SP series

Gulfstream G550 Customer Bulletin 14, dated 23 June 2005

GV series

Gulfstream GV Customer Bulletin 135, dated 23 June 2005

Note 1: The Gulfstream customer bulletins identified in Table 1 of this Directive include Vought Service Bulletin SB-VAIGV/GVSP-27-PG0098, dated 9 May 2005, as an additional source of service information for the repair.

2. If, during the Requirement 1 repair, any nick or other damage is found on or to the environmental seal around the installed wires (see paragraph 2.B.(2)c)7. or 2.C.(2)c)7. of SB-VAIGV/GVSP-27-PG0098), repair using a method approved by the Manager, Atlanta Aircraft Certification Office (ACO), United States Federal Aviation Administration (FAA). For a repair method to be approved by the Manager, Atlanta ACO, as required by this paragraph, the Manager's approval letter must specifically refer to FAA AD 2006-18-13.

Note 2: For information regarding a repair method approved by the Manager, Atlanta ACO contact your area Gulfstream Field Service Representative.

Note 3: FAA AD 2006-18-13 Amdt 39-14752 refers.

\n```\n\n| Compliance: | For Requirement 1 - Before 31 October 2007. |\n| ----------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| | For Requirement 2 - Before further flight, after the damage to the environmental seal is detected. |\n| | This Airworthiness Directive becomes effective on 2 August 2007. |\n| Background: | The FAA has advised that a report indicating that the aileron force link assembly wiring harness outer shield and insulation on the primary conductors may have been inadvertently cut due to an improper method used to remove the wiring outer jacket. This Directive is issued to prevent the loss of the hardover prevention system (HOPS) in the roll axis due to a short circuit in the wiring harness, which could result in reduced controllability of the aeroplane. |\n\n![](image.001.png) \nDavid Punshon \nDelegate of the Civil Aviation Safety Authority\n\n21 June 2007","sortOrder":0},{"sectionNumber":"AD/G1159/48","sectionType":"part","heading":"AD/G1159/48","content":"## AD/G1159/48","sortOrder":1},{"sectionNumber":"Roll Axis Hardover Protection System","sectionType":"part","heading":"Roll Axis Hardover Protection System","content":"## Roll Axis Hardover Protection System","sortOrder":2},{"sectionNumber":"8/2007","sectionType":"part","heading":"8/2007","content":"## 8/2007","sortOrder":3}],"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"},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The Directive imposes corrective repairs on the wiring harness for the specified serial numbers and adds an approval requirement for certain seal damage repairs referencing FAA AD 2006‑18‑13. The text contains no indication that it expands or narrows scope from a prior instrument; it applies only to the listed models/serials and the actions in Table 1."},"complexity_factors":["Targeted applicability by model and serial number (GV: 674–693; GV‑SP: 5001–5072) narrows scope but requires fleet checks.","Mandated corrective action references multiple manufacturer service bulletins (Table 1), requiring operators to obtain and follow specific technical documents.","Two-tier repair rule: standard repair (Requirement 1) and alternative repair for environmental‑seal damage subject to FAA Manager approval (Requirement 2), introducing regulatory coordination and approval paperwork.","Cross‑reference to FAA AD 2006‑18‑13 for approval creates dependency on external AD and specific wording in approval letters.","Compliance deadline (before 31 October 2007) imposes a firm scheduling and logistical burden on affected operators.","Safety‑critical system (HOPS) involvement increases inspection and repair scrutiny and potential operational downtime."],"plain_english_summary":"This Airworthiness Directive requires operators of specified Gulfstream GV and GV‑SP aeroplanes (listed serial numbers) to repair the aileron force link assembly wiring harness using the Gulfstream service bulletins in Table 1 to prevent loss of the roll‑axis Hardover Prevention System (HOPS) from wiring shorts. Operators must complete the repair by 31 October 2007 (Requirement 1). If damage to the environmental seal is found, repairs may only use a method approved by the Manager, Atlanta ACO, and that approval must specifically reference FAA AD 2006‑18‑13 (Requirement 2)."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific wiring defect in specific Gulfstream aircraft models. It does not expand beyond the original safety issue identified by the FAA."},"complexity_factors":["Single primary requirement with one conditional secondary requirement (damage found during repair)","Cross-reference to three external service bulletins and one FAA Airworthiness Directive (AD 2006-18-13)","Specific serial number applicability creates narrow scope but requires careful checking","Approval mechanism requires specific reference to FAA AD in approval letter (bureaucratic conditionality)","No defined terms section; technical terms (HOPS, force link assembly, environmental seal) assume aviation maintenance knowledge","Short document (~400 words) with clear structure: Applicability → Requirement → Compliance → Background"],"plain_english_summary":"This CASA Airworthiness Directive orders owners/operators of specified Gulfstream GV, GV‑SP, G500 and G550 serials to perform an urgent wiring repair on the force link assembly wire harness to correct accidentally cut shielding/insulation from manufacture. It closes a potential short in the Hardover Prevention System that could lead to loss of roll control.\n\nRepairs must be done by 31 Oct 2007; any discovered seal nicks must be rectified before the next flight using an FAA‑approved method. Compliance is mandatory."}},"importantCases":[],"_links":{"self":"/api/acts/ad-g1159-48-roll-axis-hardover-protection-system","history":"/api/acts/ad-g1159-48-roll-axis-hardover-protection-system/history","analysis":"/api/acts/ad-g1159-48-roll-axis-hardover-protection-system/analysis","conflicts":"/api/acts/ad-g1159-48-roll-axis-hardover-protection-system/conflicts","importantCases":"/api/acts/ad-g1159-48-roll-axis-hardover-protection-system/important-cases","documents":"/api/acts/ad-g1159-48-roll-axis-hardover-protection-system/documents"}}