{"id":"F2006B05677","name":"AD/PA-30/35 Amdt 1 - Aircraft Flight Manual, Flight into Icing Conditions","slug":"ad-pa-30-35-amdt-1-aircraft-flight-manual-flight-into-icing-conditions","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135426,"registerId":"commonwealth-F2006B05677-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-30/35 Amdt 1 - Aircraft Flight Manual, Flight into Icing Conditions","content":"![](image.001.png)  \n![](image.002.png)  \nPiper PA-30 & 39 (Twin Comanche) Series Aeroplanes\n\nAIRWORTHINESS DIRECTIVE\n\n![](image.002.png)\n\n![](image.002.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/PA-30/35 and issues the following AD under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\nAD/PA-30/35\n\nAmdt 1\n\n  \nAircraft Flight Manual, Flight into Icing Conditions 7/2000\n\nApplicability: Models PA30, PA39, and PA40. Requirement: Revise:\n\n    The Limitations Section of the aircraft's Aircraft Flight Manual (AFM) by incorporating the following:\n\n\"WARNING\"\n\nSevere icing may result from environmental conditions outside of those for which the aircraft is certificated.\n\nFlight in freezing rain, freezing drizzle, or mixed icing conditions (super cooled liquid water and ice crystals) may result in:\n\n    ice build-up on protected surfaces and exceed the capability of the ice protection system, or\n\n    ice forming aft of the protected surfaces.\n\nThis ice may not be shed using the ice protection systems, and may seriously degrade the performance and controllability of the aircraft.\n\nDuring flight, severe icing conditions that exceed those for which the aircraft is certificated shall be determined by the visual cues described below. If one or more of these visual cues exists, immediately request priority handling from Air Traffic Control to facilitate a route or an altitude change to exit the icing conditions. The cues are:\n\n    unusually extensive ice accumulation on the airframe and windscreen in areas not normally observed to collect ice, and/or\n\n    accumulation of ice on the upper surface of the wing aft of the protected area, and/or\n\n    accumulation of ice on the engine nacelles and propeller spinners farther aft than normally observed.\n\nSince the auto-pilot, when installed and operating, may mask tactile cues that indicate adverse changes in handling characteristics, use of the auto-pilot is prohibited when any of the visual cues specified above exist, or when unusual lateral trim requirements or auto-pilot trim warnings are encountered while the aircraft is in icing conditions.\n\nAll wing icing inspection lights must be operative prior to flight into known or forecast icing conditions at night. This direction supersedes any relief provided by any Minimum Equipment List.\n\n    2. The Normal Procedures Section of the AFM by incorporating the following:\n\nTHE FOLLOWING WEATHER CONDITIONS MAY BE CONDUCIVE TO SEVERE IN-FLIGHT ICING:\n\n    Visible rain at temperatures below 0 degrees Celsius ambient air temperature;\n    Droplets that splash or splatter on impact at temperatures below 0 degrees Celsius ambient air temperature.\n\nPROCEDURES FOR EXITING A SEVERE ICING\n\nENVIRONMENT: (These procedures are applicable to all flight phases from take-off to landing.)\n\nMonitor the ambient air temperature.\n\nWhile severe icing may form at temperatures as cold as -18 degrees Celsius, increased vigilance is warranted at temperatures around freezing when visible moisture is present.\n\nIf the visual cues which are specified in the Limitations Section of the AFM for identifying severe icing conditions are observed, accomplish the following:\n\n    Immediately request priority handling from Air Traffic Control to facilitate a route or an altitude change to exit the severe icing conditions in order to avoid extended exposure to flight conditions more severe than those for which the aircraft has been certificated.\n\n    Avoid abrupt and excessive manoeuvring that may exacerbate control difficulties.\n\n    Do not engage the autopilot.\n    If the autopilot had previously been engaged, hold the control wheel firmly and disengage the autopilot.\n\n    If an unusual roll response or un-commanded roll control movement is observed, reduce the angle-of-attack.\n\n    Do not extend flaps when holding in icing conditions. Operation with flaps extended can result in a reduced wing angle-of-attack, with the possibility of ice forming on the upper surface further aft on the wing than normal, possibly aft of the protected area.\n\n    If the flaps are extended, do not retract them until the airframe is clear of ice.\n    Report these weather conditions to Air Traffic Control.\n\nNote 1: Certificate of Registration holders should initiate action to ensure notification of this change is conveyed to any person who may operate their aircraft as pilot in command.\n\nNote 2: FAA AD 99-14-01 refers.\n\nCertification for accomplishment of this Directive may be carried out:\n\n    after a copy of this Directive is included in the appropriate sections of the aircraft's AFM; and\n\n    b. may be carried out at a minimum, by the holder of a private pilot's licence.\n\nCompliance: Within 30 days after the Effective date of this Amendment.\n\nThis Amendment becomes effective on 13 July 2000.\n\nBackground: This Directive is issued to minimise the potential hazards associated with operating the aircraft in severe icing conditions by providing more clearly defined procedures and limitations associated with such conditions.\n\nAmendment 1 is issued to correct a word processing error in the initial issue.\n\nThe original issue of this Airworthiness Directive became effective on 23 March 2000.\n\n![](image.003.png)  \n\nBernard Malcolm Hole\n\nDelegate of the Civil Aviation Safety Authority 31 May 2000\n\n![](image.002.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 14 June 2000.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Amendment 1 corrects a word‑processing error in the initial issue; the AD revokes the prior AD and republishes the same operational requirements (Background: \"Amendment 1 is issued to correct a word processing error in the initial issue\"). No change to applicability (Models PA30, PA39, PA40) or the compliance obligations is indicated."},"complexity_factors":["Document change requirement: AFM Limitations and Normal Procedures must be revised and incorporated into the aircraft AFM (Requirement section).","Operational judgement: pilots must identify “severe icing” by visual cues and make immediate ATC priority requests and routing/altitude changes (Requirement: visual cues; Procedures for exiting).","Pilot behaviour constraints: autopilot prohibited when specified visual cues or unusual trim warnings occur; procedures for disengagement and control inputs are specified (Requirement).","Equipment operability mandate: all wing icing inspection lights must be operative before night flight into known/forecast icing; supersedes MEL relief (Requirement).","Compliance timing and certification: AFM update and certification must be done within 30 days; certification may be completed after insertion into AFM and may be signed by a private pilot (Compliance; Certification paragraph).","Interaction with existing documents and operations: refers to FAA AD 99‑14‑01 and may require notifying other pilots/operators (Note 2; Note 1), creating an administrative notification burden.","Ambiguity risk: identification of severe icing relies on visual cues and pilot judgment, creating potential variability in operational response and ATC interactions (Requirement: visual cues; Procedures)."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of Piper PA‑30, PA‑39 and PA‑40 (Twin Comanche) aeroplanes to update the Aircraft Flight Manual within 30 days to add specific limitations and normal‑procedure text for identifying and exiting severe in‑flight icing. It changes pilot actions (visual cues, autopilot prohibition in specified icing cues, flap and trim guidance) and equipment checks (wing inspection lights operable) so pilots and registrants must revise manuals, ensure equipment readiness, and follow new reporting and handling steps."},"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":3,"scope_assessment":{"changed":false,"description":"This amendment maintains the original scope of the March 2000 directive. Amendment 1 was issued solely to correct a word processing error in the initial issue, as explicitly stated in the Background section. The substantive safety requirements regarding flight into icing conditions remain unchanged from the original intent."},"complexity_factors":["Single specific aircraft type applicability (Piper PA-30/39/40 series only)","Straightforward amendment structure with clear 'Applicability', 'Requirement', 'Compliance', and 'Background' sections","No defined terms section or complex cross-references to other legislation","Simple conditional logic limited to 'if-then' operational scenarios (if visual cues observed, then take specific actions)","Two-part requirement structure (Limitations Section and Normal Procedures Section) with numbered sub-points","Single amendment note correcting a 'word processing error' in original issue","Minimal regulatory references (only cites CAR 1998 subregulation 39.1(1) and FAA AD 99-14-01 in passing)","Clear compliance pathway: insert text into AFM, certify completion, can be done by private pilot holder"],"plain_english_summary":"This AD requires owners/operators of Piper PA-30, PA-39 and PA-40 Twin Comanche aircraft to amend their Aircraft Flight Manual within 30 days of 13 July 2000 with new warnings and procedures for severe icing. It adds visual cues, mandatory escape actions (including immediate ATC priority routing and autopilot prohibition), night lighting checks, and reporting steps. It matters because severe icing can overwhelm protections and lead to loss of control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-30-35-amdt-1-aircraft-flight-manual-flight-into-icing-conditions","history":"/api/acts/ad-pa-30-35-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/history","analysis":"/api/acts/ad-pa-30-35-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/analysis","conflicts":"/api/acts/ad-pa-30-35-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/conflicts","importantCases":"/api/acts/ad-pa-30-35-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/important-cases","documents":"/api/acts/ad-pa-30-35-amdt-1-aircraft-flight-manual-flight-into-icing-conditions/documents"}}