{"id":"F2006B09970","name":"AD/FSM/26 - Air Metering Stop Pin P/N 62-226 Fitted to MA4-5, MA-5 and MA-6 Series Carburettors","slug":"ad-fsm-26-air-metering-stop-pin-p-n-62-226-fitted-to-ma4-5-ma-5-and-ma-6-series-carburettors","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55251,"registerId":"commonwealth-F2006B09970-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/FSM/26 - Air Metering Stop Pin P/N 62-226 Fitted to MA4-5, MA-5 and MA-6 Series Carburettors","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nFuel Supply and Metering Equipment\n\nAD/FSM/26 Air Metering Stop Pin P/N 62-226 Fitted to\n\nMA4-5, MA-5 and MA-6 Series Carburettors\n\n  \n5/89\n\nApplicability: Facet Aerospace (Marvel Schebler) MA4-5, MA-5 and MA-6 series carburettors manufactured after April 1984 whose part number and serial numbers are listed in the Requirement Document.\n\nNote: These carburettors may be used on but not limited to Lycoming 0-360, 0-540, VO-540 and TVO-435 series engines; Teledyne Continental 0-470 series engines and Pezetel (Franklin) model 6A-350 series engines).\n\nRequirement: Modify affected carburettors in accordance with Facet Aerospace products service bulletin A1-88 dated August 1988.\n\nNote: FAA AD 89-04-02 Amdt 39-6109 refers.\n\nCompliance: Unless already accomplished prior to installation, at the next removal or prior to achieving 200 operating hours after 18 May 1989 whichever is the sooner.\n\nBackground: This directive is issued to prevent a potential risk to the safety of flight due to the possibility of the engine throttle becoming jammed inside the carburettor if the air metering stop pin becomes loose.","sortOrder":0}],"analysis":{"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 in specific carburettor models. It has not expanded beyond its original purpose of preventing throttle jamming due to a loose stop pin."},"complexity_factors":["Single, specific mechanical defect addressed with clear part numbers and serial number ranges","Straightforward applicability test based on manufacturer, model series, and manufacture date","Simple compliance deadline: next removal OR 200 hours, whichever is sooner","Only one requirement: follow the referenced service bulletin","No nested exceptions, conditional logic, or extensive cross-referencing beyond the single FAA AD reference","Short document (approximately 200 words) with minimal defined terms"],"plain_english_summary":"This CASA Airworthiness Directive mandates modification of Facet (Marvel Schebler) MA4‑5, MA‑5 and MA‑6 carburettors manufactured after April 1984 because an air‑metering stop pin can work loose and jam the throttle, risking loss of engine power control. Owners/operators of affected aircraft (engines like Lycoming O‑360/O‑540, Continental O‑470, Franklin 6A‑350, etc.) must apply Facet Service Bulletin A1‑88 at next carburettor removal or within 200 flight hours from 18 May 1989."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Scope remains targeted to MA4-5, MA-5 and MA-6 series carburettors manufactured after April 1984 whose part and serial numbers are listed in the Requirement Document; it requires modification per service bulletin A1-88 and sets the same compliance window (Applicability; Requirement; Compliance). No expansion or contraction of affected equipment is indicated in the text supplied."},"complexity_factors":["Applicability is limited to carburettors identified by part number and serial number, requiring operators to check serial lists (Applicability).","Mandates modification per an external service bulletin (Facet Aerospace service bulletin A1-88) rather than prescribing procedural detail in the directive (Requirement).","Conditional compliance timing—at next removal or before 200 operating hours after 18 May 1989—creates scheduling and record-keeping obligations (Compliance).","Safety-critical operational impact (risk of throttle jamming) raises urgency and potential disruption to aircraft availability (Background).","Cross-reference to an FAA AD introduces an external regulatory linkage that may affect interpretation or maintenance practices (Note)."],"plain_english_summary":"This Airworthiness Directive requires owners/operators to modify specific Facet Aerospace (Marvel Schebler) MA4-5, MA-5 and MA-6 carburettors (manufactured after April 1984 and listed by part and serial number) by following Facet service bulletin A1-88. The stated purpose is to prevent possible throttle jamming if the air‑metering stop pin becomes loose. Who pays and acts: the aircraft owner/operator must arrange and fund the modification; compliance is at the next carburettor removal or within 200 operating hours after 18 May 1989, whichever is sooner."}},"importantCases":[],"_links":{"self":"/api/acts/ad-fsm-26-air-metering-stop-pin-p-n-62-226-fitted-to-ma4-5-ma-5-and-ma-6-series-carburettors","history":"/api/acts/ad-fsm-26-air-metering-stop-pin-p-n-62-226-fitted-to-ma4-5-ma-5-and-ma-6-series-carburettors/history","analysis":"/api/acts/ad-fsm-26-air-metering-stop-pin-p-n-62-226-fitted-to-ma4-5-ma-5-and-ma-6-series-carburettors/analysis","conflicts":"/api/acts/ad-fsm-26-air-metering-stop-pin-p-n-62-226-fitted-to-ma4-5-ma-5-and-ma-6-series-carburettors/conflicts","importantCases":"/api/acts/ad-fsm-26-air-metering-stop-pin-p-n-62-226-fitted-to-ma4-5-ma-5-and-ma-6-series-carburettors/important-cases","documents":"/api/acts/ad-fsm-26-air-metering-stop-pin-p-n-62-226-fitted-to-ma4-5-ma-5-and-ma-6-series-carburettors/documents"}}