{"id":"F2006B05674","name":"AD/PA-30/32 - Flap Extension Limitation - Warning Placard","slug":"ad-pa-30-32-flap-extension-limitation-warning-placard","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135415,"registerId":"commonwealth-F2006B05674-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-30/32 - Flap Extension Limitation - Warning Placard","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)  \nPiper PA-30 & 39 (Twin Comanche) Series Aeroplanes\n\nAD/PA-30/32 Flap Extension Limitation \\- Warning Placard 6/83\n\nApplicability: Models PA-30, PA-39 series which have been modified in accordance with FAA Supplemental Type Certificate SA2312WE (Robertson STOL modification kit).\n\nRequirement: 1. To prevent possible loss of aeroplane control due to an asymmetric flap extension or retraction, install a placard on the panel near the flap actuator which reads:\n\n“DO NOT EXTEND FLAPS BEYOND 15 DEGREES (TAKEOFF POSITION)”.\n\n2. The placard may be removed when a positive flap retraction system is installed in accordance with Robertson Aircraft Corporation Service Bulletin 19 dated 22 October 1982.\n\nNote: FAA AD 82-23-01 refers.\n\nCompliance: Within 25 hours time in service after 16 May 1983.\n\nBackground: An accident investigation has shown that a loss of aeroplane lateral control can occur if an asymmetric flap condition is allowed to develop, in subject aircraft fitted with the Robertson STOL modification kit. A Robertson Service Bulletin has been issued in order to overcome the problem.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete airworthiness directive addressing a specific safety issue with a specific aircraft modification. It has not expanded beyond its original purpose of preventing asymmetric flap accidents in Robertson STOL-modified PA-30/39 aircraft."},"complexity_factors":["Single, specific aircraft type and modification scope","Only 2 operative requirements (install placard, or alternatively install mechanical fix)","No defined terms section","No cross-references to other legislation (only references to FAA documents and manufacturer service bulletins for context)","Clear, unconditional directive with simple alternative compliance path","Total length: approximately 200 words"],"plain_english_summary":"This safety order applies to Piper PA‑30 and PA‑39 Twin Comanche aeroplanes fitted with the Robertson STOL kit: owners/operators must place a placard by the flap controls warning “DO NOT EXTEND FLAPS BEYOND 15 DEGREES (TAKEOFF POSITION)” to prevent asymmetric flap extension that can lead to loss of control. The placard was required within 25 flight hours after 16 May 1983 and may be removed by installing the positive flap retraction system per Robertson Service Bulletin 19."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"Does not change the original safety objective. Mechanically it imposes a temporary operational limitation (placard installation) on PA‑30/PA‑39 aircraft with the Robertson STOL kit (Requirement 1), removable only after installing the positive flap retraction system per Robertson Service Bulletin 19 (Requirement 2). Compliance deadline is 25 hours TIS after 16 May 1983. Costs and compliance actions are borne by the aircraft owner/operator; pilots must comply with the 15° flap limit until retrofit is completed."},"complexity_factors":["Very narrow applicability: only PA‑30 and PA‑39 aircraft modified by FAA STC SA2312WE (Robertson STOL kit).","Simple technical action: install a placard near flap actuator stating a 15° limit (low material and labour cost).","Conditional removal: placard may be removed only after installation of a positive flap retraction system per Robertson Service Bulletin 19, which may impose retrofit cost and work.","Operational change: pilots must not extend flaps beyond 15° unless the retrofit is fitted — an immediate procedural constraint on flight crews.","Short compliance window: specified 25 hours time‑in‑service deadline increases near‑term administrative/maintenance demand on owners.","Cross-reference to FAA AD 82‑23‑01 and Robertson Service Bulletin creates dependency on external documents for remedial action details.","Enforcement and documentation burden is low (inspection of placard/retrofit status), but responsibility and cost fall to the owner/operator."],"plain_english_summary":"Requires owners/operators of Piper PA‑30 and PA‑39 aeroplanes fitted with the Robertson STOL kit to install a cockpit placard by the flap actuator reading “DO NOT EXTEND FLAPS BEYOND 15 DEGREES (TAKEOFF POSITION)”. The placard can be removed only after fitting a positive flap retraction system per Robertson Service Bulletin 19. The measure is intended to reduce the risk of loss of lateral control from asymmetric flap extension; compliance was required within 25 hours time‑in‑service. Costs and installation responsibility lie with the aircraft owner/operator."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-30-32-flap-extension-limitation-warning-placard","history":"/api/acts/ad-pa-30-32-flap-extension-limitation-warning-placard/history","analysis":"/api/acts/ad-pa-30-32-flap-extension-limitation-warning-placard/analysis","conflicts":"/api/acts/ad-pa-30-32-flap-extension-limitation-warning-placard/conflicts","importantCases":"/api/acts/ad-pa-30-32-flap-extension-limitation-warning-placard/important-cases","documents":"/api/acts/ad-pa-30-32-flap-extension-limitation-warning-placard/documents"}}