{"id":"F2007L04750","name":"AD/ROBIN/27 Amdt 2 - Rudder Pedal Bars","slug":"ad-robin-27-amdt-2-rudder-pedal-bars","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":71263,"registerId":"commonwealth-F2007L04750-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Robin Aviation Series Aeroplanes","sectionType":"division","heading":"Robin Aviation Series Aeroplanes","content":"### Robin Aviation Series Aeroplanes\n\n| AD/ROBIN/27 Amdt 2 | Rudder Pedal Bars | 1/2008 |\n| ------------------ | ----------------- | ------ |\n\n| Applicability: | Model R 2100, R 2100 A, R 2112, R 2120 U, R 2160, R 2160 D, and R 2160 I aircraft, serial numbers 1 through 378; and aircraft not fitted with reinforced rudder bars part number (P/N) 27.40.31.010 and P/N 27.40.31.020.Model HR 200/100, HR 200/100S, HR 200/120, HR 200/120B, and HR 200/160 aircraft, serial numbers 1 through 378, and aircraft not fitted with reinforced rudder bars part number P/N 27.40.31.010 and P/N 27.40.31.020.Note 1: This Directive is not applicable if reinforced rudder bars are already installed in accordance with a previous issue of this Directive.Note 2: This Directive is not applicable to the R 2000 series aircraft manufactured by Alpha Aviation. These aircraft are fitted with reinforced rudder bars at manufacture.                                                                                                                                                                                                                                                                                                                  |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | 1. For Model R 2000 series aircraft, replace the left rudder bar P/N 27.23.05.010 and the right rudder bar P/N 27.23.05.020 with reinforced rudder bars part number P/N 27.40.31.010 and P/N 27.40.31.020 respectively, in accordance with Alpha Aviation Service Bulletin AA-SB27-003.2. For Model HR 200 and R 2120 U aircraft, check the geometrical shape of both the rudder bars in accordance with Figure 1. Maintain the rudder bars in the neutral position and measure distances G1, G2, and D1, D2 (the distance between the foot tubes and the front face of the frame box located under the seats). The difference between G1 and G2, or D1 and D2 is the distortion.a. If D1=D2 and G1=G2 (+/- 5mm), there is no significant distortion and no action is required, re-inspect at intervals not to exceed 500 hours time in service.b. If the distortion is between 5mm and 10mm, re-inspect at intervals not to exceed 100 hours time in service, until replaced with reinforced rudder bars part number P/N 27.40.31.010 and P/N 27.40.31.020 in accordance withAA-SB27-003. |\n\n|             | c. If the distortion is equal to or greater than 10mm, replace both rudder bars in accordance with AA-SB27-003.Figure 1Note 1: Reinforced rudder bars part number P/N 27.40.31.010 and P/N 27.40.31.020 have a flat welded reinforcing gusset on the right side and a bent welded reinforcing gusset on the left side. Refer to AA-SB27-003 for details.Note 2: The installation of P/N 27.40.31.010 and P/N 27.40.31.020 rudder bars is terminating action to the requirements of this Directive.Note 3: NZ CAA AD DCA/R2000/23B refers. |\n| ----------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Compliance: | 1. Within 50 hours time in service after 17 January 2008 or before 17 April 2008, whichever occurs first, unless already accomplished.2. Within 100 hours time in service after 17 January 2008, and thereafter at the intervals specified in Requirement 2, until both rudder bars are replaced withP/N 27.40.31.010 and P/N 27.40.31.020 rudder bars.                                                                                                                                                                                   |\n|             | This Amendment becomes effective on 17 January 2008.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |\n| Background: | The manufacturer received a report of rudder bar distortion which occurred during intensive aerobatic operation.Amendment 1 was issued in response to a NZ CAA AD, which was prompted by the new Type Certificate holder for the HR 200 and R 2000 series aircraft, Alpha Aviation; correcting the applicable aircraft serial number range and including a means of identifying reinforced rudder bars.                                                                                                                                   |\n\n|     | Amendment 2 is issued in response to a revision of the related NZ CAA AD, which expands aircraft applicability and reduces the inspection interval for unmodified HR 200 and R 2120 U aircraft. |\n| --- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.002.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n29 November 2007","sortOrder":0},{"sectionNumber":"AD/ROBIN/27 Amdt 2","sectionType":"part","heading":"AD/ROBIN/27 Amdt 2","content":"## AD/ROBIN/27 Amdt 2","sortOrder":1},{"sectionNumber":"Rudder Pedal Bars","sectionType":"part","heading":"Rudder Pedal Bars","content":"## Rudder Pedal Bars","sortOrder":2},{"sectionNumber":"1/2008","sectionType":"part","heading":"1/2008","content":"## 1/2008","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":4,"scope_assessment":{"changed":true,"description":"The original directive appears to have covered only the R 2000 series aircraft. Amendment 1 expanded scope to include HR 200 series and corrected serial number ranges. Amendment 2 further expanded applicability to include R 2120 U aircraft and reduced inspection intervals for unmodified HR 200 and R 2120 U aircraft. The directive has evolved from a simple replacement order for one aircraft family to a complex, tiered inspection regime covering multiple aircraft families with different compliance paths based on measured distortion levels."},"complexity_factors":["Multiple aircraft model variants with overlapping but distinct applicability rules (R 2000 series vs HR 200/R 2120 U series)","Nested conditional logic: different actions required based on measured distortion thresholds (0-5mm, 5-10mm, 10mm+)","Cross-reference to external technical document (Alpha Aviation Service Bulletin AA-SB27-003) for implementation details","Dual compliance timelines (50 hours/17 April 2008 deadline vs ongoing 100-hour inspection intervals)","Multiple exclusion clauses (Note 1: previous directive compliance; Note 2: Alpha Aviation manufactured R 2000 series)","Technical measurement requirements (G1, G2, D1, D2 distances) requiring reference to Figure 1","Amendment history references (Amendment 1, Amendment 2) explaining evolution of requirements"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspection or replacement of rudder pedal bars on specified Robin R 2100/R 2112/R 2120 U/R 2160 and HR 200 series aeroplanes (serials 1–378) unless already fitted with reinforced bars; Alpha Aviation R 2000s are excluded. Owners must replace or measure for distortion and follow re-check or immediate replacement intervals.  \n\nAction is required within 50 flight hours after 17 Jan 2008 or by 17 Apr 2008 to prevent loss of directional control during aerobatic operations."},"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":true,"description":"Amendment 2 broadened which aircraft are covered and shortened inspection intervals for unmodified HR 200 and R 2120 U aircraft compared with the prior Directive. (Background: \"Amendment 2 is issued in response to a revision of the related NZ CAA AD, which expands aircraft applicability and reduces the inspection interval for unmodified HR 200 and R 2120 U aircraft.\")"},"complexity_factors":["Multiple affected airframes and serial‑number limits create scope parsing (Applicability).","Measurement‑based thresholds (compare G1/G2 and D1/D2) produce three outcome bands: no action, increased inspection frequency, or mandatory replacement (Requirement: measurement procedure / Figure 1).","Different inspection intervals tied to measured distortion and fixed compliance deadlines (Compliance 1 & 2; Requirement a–c).","Mandatory replacement with specific part numbers (P/N 27.40.31.010 / 27.40.31.020) and reliance on an external service bulletin for the work scope (Requirement 1; AA‑SB27‑003).","Exemptions and terminating action: installs already done exempt the Directive; installation of reinforced bars terminates further inspection obligations (Applicability Note 1; Requirement Note 2).","Cross‑jurisdictional reference to NZ CAA Airworthiness Directive and prior amendments increases traceability needs (Requirement Note 3; Background).","Operational compliance burden falls on aircraft owners/operators (inspection time, parts cost, downtime) with CASA enforcement via effective dates (Compliance; signature/effective date)."],"plain_english_summary":"Requires owners/operators of certain Robin and HR 200-series light aircraft (serials 1–378 and those not already fitted with reinforced rudder bars) to inspect rudder pedal bars for geometric distortion and, when distortion exceeds set limits, to replace them with specified reinforced parts per Alpha Aviation Service Bulletin AA-SB27-003. Inspections and replacements must meet fixed flight‑hour deadlines and recurring intervals; installing the reinforced bars terminates the inspection requirement."}},"importantCases":[],"_links":{"self":"/api/acts/ad-robin-27-amdt-2-rudder-pedal-bars","history":"/api/acts/ad-robin-27-amdt-2-rudder-pedal-bars/history","analysis":"/api/acts/ad-robin-27-amdt-2-rudder-pedal-bars/analysis","conflicts":"/api/acts/ad-robin-27-amdt-2-rudder-pedal-bars/conflicts","importantCases":"/api/acts/ad-robin-27-amdt-2-rudder-pedal-bars/important-cases","documents":"/api/acts/ad-robin-27-amdt-2-rudder-pedal-bars/documents"}}