{"id":"F2009L00738","name":"AD/PC-12/56 - Stick-Pusher Servo-Cables Attachment Clamps","slug":"ad-pc-12-56-stick-pusher-servo-cables-attachment-clamps","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":77684,"registerId":"commonwealth-F2009L00738-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Pilatus PC-12 Series Aeroplanes","sectionType":"division","heading":"Pilatus PC-12 Series Aeroplanes","content":"### Pilatus PC-12 Series Aeroplanes\n\n| AD/PC-12/56 | Stick-Pusher Servo-Cables Attachment Clamps | 4/2009 DM |\n| ----------- | ------------------------------------------- | --------- |\n\n| Applicability: | Model PC-12, PC-12/45 and PC-12/47 aircraft, with manufacturer serial number 101 through 544 and 546 through 888; and,Model PC-12/47E aircraft, with manufacturer serial number 545 and 1001 through 1101.                                                                                                                                                                                                                                                                                     |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Inspect the stick-pusher servo-cables for correct installation, position and tension, in accordance with the accomplishment instructions of Pilatus PC-12 Service Bulletin No. 27-020 Revision 1, or later EASA approved revision.If any damage is found, before further flight, accomplish all corrective actions in accordance with the accomplishment instructions of Pilatus PC-12 Service Bulletin No. 27-020 Revision 1, or later EASA approved revision.Note: EASA AD 2009-0040 refers. |\n| Compliance:    | Within 150 flight hours or 30 days after 1 March 2009, whichever occurs first.                                                                                                                                                                                                                                                                                                                                                                                                                 |\n|                | This Airworthiness Directive becomes effective on 1 March 2009.                                                                                                                                                                                                                                                                                                                                                                                                                                |\n| Background:    | Reports were received of the rear stick-pusher cable clamp shifting forward on the elevator cable. This condition, if not corrected, could reduce the effectiveness of the stick-pusher and/or limit elevator control movement. Ambiguous information in the adjustment procedure for the stick-pusher cable tension, and stick-pusher cable tension decrease with time, were identified as contributing factors.                                                                              |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n23 February 2009","sortOrder":0},{"sectionNumber":"AD/PC-12/56","sectionType":"part","heading":"AD/PC-12/56","content":"## AD/PC-12/56","sortOrder":1},{"sectionNumber":"Stick-Pusher Servo-Cables Attachment Cla","sectionType":"part","heading":"Stick-Pusher Servo-Cables Attachment Clamps","content":"## Stick-Pusher Servo-Cables Attachment Clamps","sortOrder":2},{"sectionNumber":"4/2009 DM","sectionType":"part","heading":"4/2009 DM","content":"## 4/2009 DM","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":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive addressing a specific mechanical defect in a specific aircraft type. It has not expanded beyond its original safety purpose."},"complexity_factors":["Very short document (approximately 300 words)","Only 4 defined elements: specific aircraft models, serial number ranges, the referenced service bulletin, and EASA AD 2009-0040","Single straightforward requirement with one conditional (if damage found, fix before flight)","No nested exceptions or complex conditional logic","Clear compliance deadline with simple alternative calculation (150 hours OR 30 days)","Minimal cross-referencing (only to Pilatus Service Bulletin 27-020 and EASA AD 2009-0040)"],"plain_english_summary":"This AD mandates owners/operators of specified Pilatus PC‑12 models to inspect stick‑pusher servo cables for correct installation, position, and tension, and to repair any damage before flight. \n\nIt responds to reports of a slipping cable clamp that can reduce stick‑pusher effectiveness or restrict elevator travel, caused by unclear maintenance instructions and cable tension loss; compliance is required within the stated flight‑hour/time window."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The provided text sets a clear applicability and required actions; there is no indication in this document that the AD's scope was altered from its stated applicability or intended corrective measures."},"complexity_factors":["Multiple affected models and non-contiguous serial number ranges (PC-12, PC-12/45, PC-12/47: s/n 101–544 and 546–888; PC-12/47E: s/n 545 and 1001–1101) increasing tracking effort for operators.","Mandated compliance with Pilatus Service Bulletin No. 27-020 Revision 1 or a later EASA‑approved revision, requiring access to and reliance on an external manufacturer document.","Short compliance window: within 150 flight hours or 30 days after 1 March 2009.","Safety-critical requirement that any damage found must be corrected before further flight, which may impose immediate repair costs and aircraft downtime.","Dependence on EASA approval for later revisions introduces regulatory dependency and potential uncertainty if revisions are issued.","Background notes ambiguity in the original adjustment procedure and that cable tension can decrease over time, implying possible repeat inspections or ongoing maintenance monitoring."],"plain_english_summary":"**Requires inspection and, if needed, immediate corrective action on the stick‑pusher servo‑cable attachment clamps of specified Pilatus PC‑12 series aeroplanes, following Pilatus Service Bulletin No. 27‑020 (or a later EASA‑approved revision).** It applies to listed PC‑12 models and serial numbers and must be done within 150 flight hours or 30 days after 1 March 2009. The directive responds to reports that a rear clamp can shift forward and could reduce stick‑pusher effectiveness or limit elevator control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pc-12-56-stick-pusher-servo-cables-attachment-clamps","history":"/api/acts/ad-pc-12-56-stick-pusher-servo-cables-attachment-clamps/history","analysis":"/api/acts/ad-pc-12-56-stick-pusher-servo-cables-attachment-clamps/analysis","conflicts":"/api/acts/ad-pc-12-56-stick-pusher-servo-cables-attachment-clamps/conflicts","importantCases":"/api/acts/ad-pc-12-56-stick-pusher-servo-cables-attachment-clamps/important-cases","documents":"/api/acts/ad-pc-12-56-stick-pusher-servo-cables-attachment-clamps/documents"}}