{"id":"F2007L00861","name":"AD/ERJ-170/5 - Ice Detection System","slug":"ad-erj-170-5-ice-detection-system","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":64641,"registerId":"commonwealth-F2007L00861-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Embraer ERJ-170 Series Aeroplanes","sectionType":"division","heading":"Embraer ERJ-170 Series Aeroplanes","content":"### Embraer ERJ-170 Series Aeroplanes\n\n| AD/ERJ-170/5 | Ice Detection System | 5/2007 DM |\n| ------------ | -------------------- | --------- |\n\n| Applicability: | ERJ-170( ) model aeroplanes.                                                                                                                                                                                                                                                                                                    |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Carry out an ice detection system operational test in accordance with AMM TASK 30-81-01-710-801-A.                                                                                                                                                                                                                              |\n|                | Installation of Primus EPIC system software Load 15.3 or higher in accordance with Embraer Service Bulletin 170-31-0002, original issue, or later revision approved by either the Brazilian Departamento de Avição Civil (DAC) or Agência Nacional de Avição Civil (ANAC) constitutes terminal action for the repetitive tests. |\n|                | Note: DAC AD 2004-11-07R1 refers.                                                                                                                                                                                                                                                                                               |\n| Compliance:    | Within 100 hours time in service (TIS) after the effective date of this Directive or when the aircraft accumulates a total of 1000 hours TIS and thereafter at intervals not to exceed 1000 hours TIS until the installation of Primus EPIC system software Load 15.3 or higher is accomplished.                                |\n|                | This Airworthiness Directive becomes effective on 4 April 2007.                                                                                                                                                                                                                                                                 |\n| Background:    | The Brazilian DAC has advised that a particular failure mode of the aircraft ice detection system is not adequately tested by the software of the Primus EPIC Modular Avionics Unit, which can allow the operation of the aircraft without the required ice protection.                                                         |\n\n![](image.001.png)  \nCharles Lenarcic  \nDelegate of the Civil Aviation Safety Authority\n\n28 March 2007","sortOrder":0},{"sectionNumber":"AD/ERJ-170/5","sectionType":"part","heading":"AD/ERJ-170/5","content":"## AD/ERJ-170/5","sortOrder":1},{"sectionNumber":"Ice Detection System","sectionType":"part","heading":"Ice Detection System","content":"## Ice Detection System","sortOrder":2},{"sectionNumber":"5/2007 DM","sectionType":"part","heading":"5/2007 DM","content":"## 5/2007 DM","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"This Directive does not expand the class of affected aircraft beyond ERJ-170 models; it prescribes interim repetitive testing until a specific software upgrade is installed, then terminates that testing. It implements a corrective maintenance requirement tied to a previously identified failure mode (referenced DAC AD) rather than broadening regulatory scope."},"complexity_factors":["Single clear mandatory action: perform ice-detection system operational test in accordance with AMM TASK 30-81-01-710-801-A (Requirement).","Repeating timing rules: initial compliance within 100 hours TIS after effective date or when aircraft reaches 1000 hours TIS, then every 1000 hours TIS until terminal action (Compliance).","Terminal action relies on software upgrade: installation of Primus EPIC system software Load 15.3 or higher per Embraer Service Bulletin 170-31-0002, original issue or later revision approved by DAC or ANAC (Requirement).","Cross-authority approval: later SB revisions require approval by Brazilian DAC or ANAC, adding regulatory coordination (Requirement).","Reference to technical maintenance procedure: directs compliance to a specific AMM task, requiring access to and competence with that manual (Requirement).","Applicability label is minimally specified as 'ERJ-170( ) model aeroplanes', which is potentially ambiguous and could complicate operator interpretation (Applicability).","Background links to a prior DAC AD (DAC AD 2004-11-07R1), indicating this is a targeted corrective action responding to a known software failure mode (Background)."],"plain_english_summary":"Requires operators of Embraer ERJ-170 aeroplanes to perform an operational test of the ice-detection system at specified flight-hour intervals until a software upgrade is installed. The Directive makes the test mandatory, sets timing for the checks, and says installing Primus EPIC software Load 15.3 (or later approved revision) ends the repetitive test requirement. It affects aircraft operators and maintenance organisations because it creates recurring maintenance work and an optional one-off software upgrade as the terminating action."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard, targeted Airworthiness Directive addressing a specific safety defect in a specific aircraft type. The scope remains precisely limited to ice detection system compliance for ERJ-170 aircraft, with no evidence of scope creep beyond the original safety purpose."},"complexity_factors":["Single, specific aircraft model applicability (ERJ-170)","Clear two-path compliance structure (repetitive testing OR terminal action)","References external technical documents (AMM TASK 30-81-01-710-801-A, Embraer Service Bulletin 170-31-0002) without reproducing them","Simple conditional logic: 'within 100 hours TIS OR at 1,000 hours TIS, whichever comes first'","Only one defined term implied (TIS = Time in Service)","No nested exceptions or complex cross-referencing within the instrument itself"],"plain_english_summary":"This AD requires operators of Embraer ERJ-170 aircraft in Australia to verify the ice-detection system and ultimately install an upgraded cockpit software to eliminate a known blind spot. It mandates repeated testing until the permanent Primus EPIC software fix is applied, because the existing logic can fail to detect a critical fault and allow flight in icing conditions—a significant safety risk."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-erj-170-5-ice-detection-system","history":"/api/acts/ad-erj-170-5-ice-detection-system/history","analysis":"/api/acts/ad-erj-170-5-ice-detection-system/analysis","conflicts":"/api/acts/ad-erj-170-5-ice-detection-system/conflicts","importantCases":"/api/acts/ad-erj-170-5-ice-detection-system/important-cases","documents":"/api/acts/ad-erj-170-5-ice-detection-system/documents"}}