{"id":"F2006B03111","name":"AD/B747/211 - Upper Rudder Pedal Cover Doubler","slug":"ad-b747-211-upper-rudder-pedal-cover-doubler","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42483,"registerId":"commonwealth-F2006B03111-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B747/211 - Upper Rudder Pedal Cover Doubler","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)  \nBoeing 747 Series Aeroplanes\n\nAD/B747/211 Upper Rudder Pedal Cover Doubler 11/99\n\nApplicability: Model 747-400 series aircraft, as listed in Boeing Alert Service Bulletin 747- 27A2378.\n\nRequirement: Conduct initial and repeat inspections in accordance with the technical requirements of FAA AD 99-16-08 Amdt 39-11243.\n\nCompliance: As specified in the Requirement document for the initial and repetitive inspections, with a revised effective date of 4 November 1999.\n\nThis Airworthiness Directive becomes effective on 4 November 1999.\n\nBackground: The FAA received a report of a disbonded doubler on the upper rudder pedal cover that interfered with rudder pedal movement. This Directive requires initial and repetitive inspections of the doubler to determine whether it is securely bonded to the pedal cover; the Directive also provides for optional terminating action for the repetitive inspections.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The text of the directive does not indicate any change in scope from an earlier instrument. It applies to model 747-400 series aircraft listed in the named Boeing service bulletin and requires inspections per the referenced FAA AD; no expansion or narrowing of applicability is described in this document (Applicability; Requirement)."},"complexity_factors":["Cross-reference to FAA AD 99-16-08 Amdt 39-11243 for technical requirements increases complexity because the AD does not itself contain inspection methods or intervals (Requirement).","Limited applicability requires checking Boeing Alert Service Bulletin 747-27A2378 to determine which 747-400 aircraft are covered (Applicability).","Presence of both repetitive inspections and an optional terminating action creates an alternative-compliance pathway that operators must evaluate (Background).","Effective date requirement means operators must align maintenance scheduling from a specific date, creating a short-term administrative deadline (Compliance)."],"plain_english_summary":"This directive requires owners/operators of certain Boeing 747-400 series aircraft to carry out initial and repetitive inspections of the upper rudder pedal cover doubler—using the inspection methods and intervals in FAA AD 99-16-08—and offers an optional terminating action to end repeats. Effective 4 Nov 1999, it responds to reported disbonding that can interfere with pedal movement; operators (or their maintenance contractors) bear the inspection and corrective costs."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect on a specific aircraft model. It has not expanded beyond its original purpose of ensuring the rudder pedal cover doubler remains securely bonded."},"complexity_factors":["Very short document (approximately 150 words)","Only 1 defined term implicitly referenced (the doubler, explained in the Background)","Single cross-reference to FAA AD 99-16-08 and Boeing Alert Service Bulletin 747-27A2378","No nested conditional logic or exceptions","Straightforward command structure: inspect, repeat, optional terminating action","Technical aviation terminology is minimal and explained in context"],"plain_english_summary":"This is an **Airworthiness Directive** (a mandatory safety order) issued by Australia's Civil Aviation Safety Authority for **Boeing 747-400 aircraft**.\n\n**What it does:**\n- Requires airlines and aircraft operators to inspect a specific part called the \"upper rudder pedal cover doubler\" — essentially a reinforcing plate on the cover of the rudder pedals (the foot controls the pilot uses to steer the plane on the ground and coordinate turns in the air).\n- The inspection must happen initially, then be repeated regularly.\n- Operators can stop the repeated inspections if they perform a permanent fix (called \"terminating action\").\n\n**Why it matters:**\nThe US Federal Aviation Administration (FAA) discovered that this doubler plate could come loose (\"disbond\"). If it detaches, it can jam the rudder pedals, potentially preventing pilots from controlling the aircraft's direction. This is a critical flight safety issue.\n\n**Who it affects:**\n- Airlines and operators flying Boeing 747-400 series aircraft\n- Maintenance crews responsible for inspecting and repairing these planes\n\n**Key details:**\n- The directive references a specific Boeing service bulletin and an FAA directive (99-16-08)\n- Compliance deadlines are set by those referenced documents\n- The rule took effect on 4 November 1999"}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-211-upper-rudder-pedal-cover-doubler","history":"/api/acts/ad-b747-211-upper-rudder-pedal-cover-doubler/history","analysis":"/api/acts/ad-b747-211-upper-rudder-pedal-cover-doubler/analysis","conflicts":"/api/acts/ad-b747-211-upper-rudder-pedal-cover-doubler/conflicts","importantCases":"/api/acts/ad-b747-211-upper-rudder-pedal-cover-doubler/important-cases","documents":"/api/acts/ad-b747-211-upper-rudder-pedal-cover-doubler/documents"}}