{"id":"F2007L04084","name":"AD/PREMIER/2 - Starter Generator Shimming","slug":"ad-premier-2-starter-generator-shimming","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":160907,"registerId":"commonwealth-F2007L04084-current","compilationNumber":null,"startDate":"2026-04-04","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Hawker Beechcraft (Raytheon) 390 Series ","sectionType":"division","heading":"Hawker Beechcraft (Raytheon) 390 Series Aeroplanes","content":"### Hawker Beechcraft (Raytheon) 390 Series Aeroplanes\n\n| AD/PREMIER/2 | Starter Generator Shimming | 12/2007 DM |\n| ------------ | -------------------------- | ---------- |\n\n| Applicability: | Model 390 aeroplanes, serial numbers RB-1 and RB-4 through RB-149. |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement: | 1. Inspect the left-hand and right-hand starter-generators, Raytheon Aircraft Company (RAC) part number (P/N) 390-389001-0001 or Advance Industries, Inc. (AI) P/N MG94A-1, to determine the serial number and suffix letter as specified in paragraph 3.A.(2) of RAC Mandatory Service Bulletin SB 24-3790 Issued August 2006. |\n| | Note 1: If a starter-generator specified in paragraph 3.A.(2) of SB 24-3790, Issued August 2006, is not found during the Requirement 1 inspection, no further action is required. |\n| | 2. If any starter-generator(s) specified in paragraph 3.A.(2) of SB 24-3790 Issued August 2006, is/are found during the Requirement 1 inspection, replace that starter-generator with a properly shimmed starter-generator in accordance with SB 24-3790 Issued August 2006 as follows: |\n| | a. If both starter-generators are identified as being improperly shimmed: |\n| | (i) Replace at least one affected starter-generator, and |\n| | (ii) Replace the other affected starter-generator. |\n| | b. If only one starter-generator is identified as being improperly shimmed, replace the affected starter-generator. |\n| | 3. Starter-generators with RAC P/N 390-389001-0001 or AI P/N MG94A-1 that is specified in paragraph 3.A.(2) of SB 24-3790 Issued August 2006 may not be installed on any aeroplane as a replacement spare. |\n| | Later revisions of the above SB, approved by the United States Federal Aviation Administration (FAA) as an Alternate Method of Compliance (AMOC) to FAA AD 2007-20-07, is/are considered acceptable for compliance with the equivalent Requirements of this Directive. |\n| | Note 2: FAA AD 2007-20-07 Amdt 39-15217 refers. |\n\n| Compliance: | For Requirement 1 - Within the next 50 hours time-in-service (TIS) after the effective date of this Directive or within the next 3 months after the effective date of this Directive, whichever occurs first. |\n| ----------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| | For Requirement 2.a. - |\n| | (i) Within 10 hours TIS after the Requirement 1 inspection. |\n| | (ii) Within the next 200 hours TIS after the effective date of this Directive or within the next 12 months after the effective date of this Directive, whichever occurs first. |\n| | For Requirement 2.b. - Within the next 200 hours TIS after the effective date of this Directive or within the next 12 months after the effective date of this Directive, whichever occurs first. |\n| | For Requirement 3 - Immediately following the Requirement 1 inspection. |\n| | This Airworthiness Directive becomes effective on 7 November 2007. |\n| Background: | The FAA has received reports of a manufacturing error where certain starter-generators may have been improperly shimmed. Improperly shimmed starter-generators could result in premature starter-generator failure. This failure could lead to increased chances of dual starter-generator failure on the same flight. |\n| | This Directive is issued to ensure any improperly shimmed starter-generators and detected and replaced. |\n\n![](image.001.png) \nDavid Punshon \nDelegate of the Civil Aviation Safety Authority\n\n10 October 2007","sortOrder":0},{"sectionNumber":"AD/PREMIER/2","sectionType":"part","heading":"AD/PREMIER/2","content":"## AD/PREMIER/2","sortOrder":1},{"sectionNumber":"Starter Generator Shimming","sectionType":"part","heading":"Starter Generator Shimming","content":"## Starter Generator Shimming","sortOrder":2},{"sectionNumber":"12/2007 DM","sectionType":"part","heading":"12/2007 DM","content":"## 12/2007 DM","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard Airworthiness Directive with focused, targeted scope. It addresses a specific manufacturing defect in specific aircraft models and does not represent scope creep from original intent. The reference to FAA AD 2007-20-07 as an acceptable alternative compliance method is standard mutual recognition practice between aviation safety authorities, not an expansion of scope."},"complexity_factors":["Multiple conditional requirements (Requirements 1, 2.a, 2.b, and 3) with different compliance timelines","Cross-references to external technical documents (Raytheon Service Bulletin SB 24-3790 and FAA AD 2007-20-07)","Nested sub-requirements (2.a has sub-parts i and ii with different deadlines)","Technical aviation terminology requiring specialized knowledge (TIS/time-in-service, shimming, starter-generator part numbers)","Dual compliance triggers (flight hours vs. calendar time — 'whichever occurs first')","Limited applicability scope (specific serial number range RB-1, RB-4 through RB-149)"],"plain_english_summary":"This AD requires owners/operators of Hawker Beechcraft (Raytheon) Premier I (Model 390) aeroplanes with specified serial numbers to inspect starter‑generators for a manufacturing shimming defect that can cause premature failure. If faulty units are found they must be removed and barred from use as spares.\n\nThe mandatory actions prevent potential dual electrical loss in flight, preserving critical systems and grounding non‑compliant aircraft until corrected."},"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":4,"scope_assessment":{"changed":false,"description":"The Directive stays within its original technical scope: identify and replace improperly shimmed starter-generators on the specified Model 390 serial-numbered airplanes and bar the affected part numbers from use as spares (Applicability; Requirement 1–3; Compliance). It does not broaden to other models, components, or novel regulatory powers; compliance depends on the referenced Service Bulletin and FAA AD for the substantive technical criteria."},"complexity_factors":["External technical reliance: compliance requires checking serial numbers/suffixes and shimming criteria as set out in RAC Mandatory Service Bulletin SB 24-3790 (Aug 2006) rather than being self-contained (Requirement 1; Requirement 2).","Cross-reference to FAA rulemaking: accepts later SB revisions only if FAA-approved as an AMOC, adding interstate regulatory linkage (Note: FAA AD 2007-20-07 reference).","Multiple, staggered compliance windows: different actions carry different deadlines (50 hours TIS/3 months; 10 hours TIS; 200 hours TIS/12 months; immediate prohibition on spare installation) increasing scheduling complexity (Compliance).","Parts-management effect: prohibition on installing specified RAC/AI P/Ns as spares creates inventory and procurement constraints for operators (Requirement 3).","Applicability limits: only specified serial-numbered aircraft are affected, so fleet-level applicability requires careful serial reconciliation (Applicability).","Replacement sequencing ambiguity: the procedure for replacing one versus both improperly shimmed units has conditional steps that operators must interpret and follow precisely (Requirement 2.a–b)."],"plain_english_summary":"This Airworthiness Directive requires operators of Hawker Beechcraft 390 Series aeroplanes (serial RB-1 and RB-4–RB-149) to inspect specific starter-generators against Raytheon Mandatory Service Bulletin SB 24-3790 (Aug 2006) and replace any units found to be improperly shimmed. Affected parts may not be used as replacement spares. The rule is intended to prevent premature starter-generator failure; aircraft operators pay inspection and replacement costs and must meet tight time limits for compliance."}},"importantCases":[],"_links":{"self":"/api/acts/ad-premier-2-starter-generator-shimming","history":"/api/acts/ad-premier-2-starter-generator-shimming/history","analysis":"/api/acts/ad-premier-2-starter-generator-shimming/analysis","conflicts":"/api/acts/ad-premier-2-starter-generator-shimming/conflicts","importantCases":"/api/acts/ad-premier-2-starter-generator-shimming/important-cases","documents":"/api/acts/ad-premier-2-starter-generator-shimming/documents"}}