{"id":"F2007L00544","name":"AD/SMA/2 Amdt 1 - Engine Electronic Control Unit","slug":"ad-sma-2-amdt-1-engine-electronic-control-unit","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":63848,"registerId":"commonwealth-F2007L00544-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"SMA Piston Engines","sectionType":"division","heading":"SMA Piston Engines","content":"### SMA Piston Engines\n\n| AD/SMA/2 Amdt 1 | Engine Electronic Control Unit | 4/2007 DM |\n| --------------- | ------------------------------ | --------- |\n\n```html\n

Applicability:

All aircraft with a Société de Motorisations Aéronautiques (SMA) SR305-230 or SR305-230-1 engine equipped with an electronic control unit (ECU) having a part number (P/N) listed below:

SF01160009-0
SP01160051-0
SP01160051-3
SP01160089-0

SF01160011-0
SP01160051-1
SP01160051-4
SP01160089-1

SP01160013
SP01160051-2
SP01160051-5
SP01160089-2

Note 1: These engines are known to be installed on, but not limited to, Cessna 182 and Reims F182 series aeroplanes.

Requirement:

1. If the ECU was not replaced in accordance with the original issue of the Directive, determine the P/N and the serial number (S/N) of the ECU installed on the aircraft.

2. If the ECU is determined to have a P/N listed in the ‘Applicability’ section of this Amendment and a S/N 131 or below, with the exception S/Ns 70, 71, 83 and 88.

a. Do not operate the engine unless in accordance with restriction noted below.

b. Remove and replace the ECU with an ECU P/N SP01160089-3, in accordance with the SMA Service Bulletin SB-01-76-005, dated 15 December 2006, or later EASA approved revision.

One ferry flight to a location capable of completing the ECU replacement is allowed. The pilot should be ready to react appropriately to a sudden power increase.

3. Replace all remaining affected P/N ECU with an ECU P/N SP01160089-3 in accordance with the SMA SB-01-76-005 or later EASA approved revision.

4. Spare ECUs having a part number listed in the ‘Applicability’ section of this Amendment may not be installed on any SMA SR305-230 or SR305-230-1 engine as a replacement part.

Note 2: EASA Emergency AD 2007-0033 refers.

\n```\n\n| Compliance: | For Requirement 1 - Before further flight after 7 March 2007. |\n| ----------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| | For Requirement 2 - Immediately after the Requirement 1 determination. |\n| | For Requirement 3 - Not later than 31 March 2007. |\n| | For Requirement 4 - After 31 March 2007. |\n| | This Amendment becomes effective on 7 March 2007. |\n| Background: | The European Aviation Safety Agency (EASA) has been advised by the engine manufacturer that over a period of time, the alteration of one ECU electronic component can cause a rapid uncontrolled power increase. Several occurrences have already been reported during engine start or during engine warm-up. This could result in loss of control of the aircraft. |\n| | This original issue of this Directive required the aircraft to be inspected to determine the ECU S/N and, if necessary, the replacement of the ECU. The Directive also allows a one time flight to a location capable of effecting replacement of the ECU. EASA has now advised that this was a temporary corrective action. |\n| | This Amendment clarifies the applicability by including a part number range and advises that the affected engine may also be installed on Reims F182 aeroplanes. At the same time, the Amendment identifies a replacement ECU part number and requires the replacement of all affected ECUs, irrespective of their serial number. Additionally, the Amendment prohibits the fitment of an affected ECU as a spare after 31 March 2007. |\n| | The original issue of this Directive became effective on 17 October 2006. |\n\n![](image.001.png) \nDavid Punshon \nDelegate of the Civil Aviation Safety Authority\n\n27 February 2007","sortOrder":0},{"sectionNumber":"AD/SMA/2 Amdt 1","sectionType":"part","heading":"AD/SMA/2 Amdt 1","content":"## AD/SMA/2 Amdt 1","sortOrder":1},{"sectionNumber":"Engine Electronic Control Unit","sectionType":"part","heading":"Engine Electronic Control Unit","content":"## Engine Electronic Control Unit","sortOrder":2},{"sectionNumber":"4/2007 DM","sectionType":"part","heading":"4/2007 DM","content":"## 4/2007 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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Yes. The Amendment expands and clarifies scope from the original Directive by specifying ECU part‑number ranges, identifying a single replacement P/N (SP01160089‑3), removing earlier serial‑number exceptions and requiring replacement of all affected units, and by prohibiting installation of affected ECUs as spares after 31 March 2007 (Background; Requirements 2–4)."},"complexity_factors":["Applicability defined by a list of multiple ECU part numbers (P/Ns) for SMA SR305‑230 / SR305‑230‑1 engines, requiring owners to identify both P/N and serial number (Requirement 1).","Serial-number conditionality: earlier text referred to S/N ≤131 with specific exceptions; Amendment removes that carve‑out by later requiring replacement of all affected P/Ns irrespective of S/N (Requirements 2–3, Background).","Phased compliance deadlines: immediate check before further flight after 7 Mar 2007, immediate action if certain S/Ns found, replacement deadline 31 Mar 2007, and spare‑fit prohibition after 31 Mar 2007 (Compliance section).","Operational allowance and risk: one ferry flight permitted to a repair location but pilot warned of possible sudden power increase — creates an operational safety/insurance consideration (Requirement 2b and accompanying paragraph).","Dependency on external document: replacement must follow SMA Service Bulletin SB‑01‑76‑005 or a later EASA‑approved revision, creating reliance on manufacturer/EASA revisions for compliance method (Requirements 2b,3).","Compliance enforcement and parts control: ban on installing listed spare ECUs after a date imposes inventory/parts‑management obligations on operators and suppliers (Requirement 4)."],"plain_english_summary":"Mechanically, this directive requires owners/operators of aircraft with SMA SR305‑230 or SR305‑230‑1 engines fitted with specified ECU part numbers to check the ECU part and serial number, replace affected units with ECU P/N SP01160089‑3 by set deadlines, and bans fitting the listed ECUs as spares after 31 March 2007; one ferry flight is allowed to reach a replacement facility. The EASA/manufacturer reported that an altered ECU component can cause sudden uncontrolled power increases during start/warm‑up, and the amendment tightens applicability and mandates replacement to address that safety risk."},"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":true,"description":"The original 2006 directive required inspection and conditional replacement. This 2007 amendment significantly expanded the scope: it now mandates replacement of ALL affected ECUs regardless of serial number (not just specific ones), prohibits future installation of affected units as spare parts, and adds new aircraft types (Reims F182) to the applicability. The amendment transformed a targeted inspection requirement into a comprehensive fleet-wide replacement mandate."},"complexity_factors":["Multiple conditional requirements based on part numbers and serial number ranges","Specific serial number exceptions within a range (S/Ns 70, 71, 83, 88 excluded from the 131-or-below rule)","Staggered compliance deadlines (four different dates/timing requirements)","Cross-reference to external technical document (SMA Service Bulletin SB-01-76-005)","Reference to European regulatory counterpart (EASA Emergency AD 2007-0033)","Nested applicability criteria (aircraft type → engine type → ECU part number → ECU serial number)"],"plain_english_summary":"This CASA Airworthiness Directive orders owners/operators of aircraft with SMA SR305-230 or SR305-230-1 engines to inspect specified ECU part/serial numbers because a faulty electronic component can cause sudden, uncontrollable engine power increases (runaway), risking loss of control. \n\nAffected aircraft must be grounded (one ferry flight to repair allowed) and fitted with the approved replacement ECU by 31 March 2007; after that date the old ECUs may not be used as spares."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sma-2-amdt-1-engine-electronic-control-unit","history":"/api/acts/ad-sma-2-amdt-1-engine-electronic-control-unit/history","analysis":"/api/acts/ad-sma-2-amdt-1-engine-electronic-control-unit/analysis","conflicts":"/api/acts/ad-sma-2-amdt-1-engine-electronic-control-unit/conflicts","importantCases":"/api/acts/ad-sma-2-amdt-1-engine-electronic-control-unit/important-cases","documents":"/api/acts/ad-sma-2-amdt-1-engine-electronic-control-unit/documents"}}