{"id":"F2008L04599","name":"AD/B737/349 - Windshield Wiper Motors","slug":"ad-b737-349-windshield-wiper-motors","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":120930,"registerId":"commonwealth-F2008L04599-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 737 Series Aeroplanes","sectionType":"division","heading":"Boeing 737 Series Aeroplanes","content":"### Boeing 737 Series Aeroplanes\n\n| AD/B737/349 | Windshield Wiper Motors | 1/2009 |\n| ----------- | ----------------------- | ------ |\n\n| Applicability: | Model 737 aeroplanes as follows: |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| | Model 737-400 and -500 series aeroplanes as identified in Boeing Alert Service Bulletin (ASB) 737-30A1059, dated 10 September 2007. |\n| | Model 737-600, -700, -700C, -800 and -900 series aeroplanes as identified in Boeing Service Bulletin (SB) 737-30A1057, Revision 1, dated 31 October 2007. |\n| Requirement: | 1. Inspect to determine the part number and serial number of the windshield wiper motors for the pilot's and first officer's windshields, and do all applicable corrective actions, by accomplishing all of the applicable actions specified in the Accomplishment Instructions of ASB 737-30A1059, (for Model 737-400 and-500 series aeroplanes); or SB 737-30A1057, Revision 1 (for Model 737-600,-700, -700C, -800 and -900 series aeroplanes); as applicable. |\n| | A review of aeroplane maintenance records is acceptable in lieu of the Requirement 1 inspection if the part number and serial number of the windshield wiper motors can be conclusively determined from that review. |\n| | Following the inspection or records review, as applicable, for any windshield wiper motor that is found not to be affected by the requirements of this Directive, re-identifying the part number is not required. |\n| | Note 1: ASB 737-30A1059 and SB 737-30A1057, Revision 1, refer to Rosemount Aerospace SB 2313M-347/2313M-348-30-01, dated 30 June 2006, as an additional source of service information for determining whether the windshield wiper motor (identified in the Rosemount SB as the \"power module'') has been previously replaced and for changing the part number. |\n| | Note 2: Appendix A of SB 2313M-347/2313M-348-30-01 identifies an incorrect serial number for Model Number 2313M-348-3. Serial number M252 should be M0252. |\n| | Note 3: SB 2313M-347/2313M- 348-30-01 specifies marking affected parts with an approved opaque material per BAC5307, classification RO, with an approved permanent marking material; however, for the purposes of this Directive, any permanent method of part marking is acceptable. |\n\n| | For Model 737-400, -500, -600, -700 and -800 series aeroplanes: Accomplishing the modification of the wiring to the windshield wiper motors required by AD/B737/218 (paragraph (b) of FAA AD 2003-20-13) is acceptable for compliance with the Requirement 1 of this Directive, provided that no Rosemount Aerospace windshield wiper motor having part number (P/N) 2313M-347-3 or P/N 2313M-348-3 (P/N 2313M347-3 or P/N 2313M348-3) has been installed. |\n| ----------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| | For Model 737-600, -700, -700C, -800 and -900 series aeroplanes: Actions accomplished before the effective date of this Directive in accordance with ASB737-30A1057, dated 6 October 2006, are acceptable for compliance with the Requirement 1; provided that the wiper motor serial number was legible for inspection purposes and the operational test specified in Step 3 in Work Packages 2 and 3 of the Accomplishment Instructions of ASB 737-30A1057, Revision 1, was completed. |\n| | 2. Rosemount Aerospace windshield wiper motors having P/N 2313M-347-3 or P/N 2313M-348-3 (P/N 2313M347-3 or P/N 2313M348-3) may not be installed on any aeroplane as a replacement spare. |\n| | Later revisions of the above SB(s), approved by the United States Federal Aviation Administration (FAA) as an Alternate Method of Compliance (AMOC) to FAA AD 2008-24-05, are considered acceptable for compliance with the equivalent Requirements of this Directive. |\n| | Note 4: FAA AD 2008-24-05 Amdt 39-15745 refers. |\n| Compliance: | For Requirement 1 - Within 60 months after the effective date of this Directive. |\n| | For Requirement 2 - As of the effective date of this Directive. |\n| | This Airworthiness Directive becomes effective on 15 January 2009. |\n| Background: | This Directive requires an inspection to determine the part and serial numbers of the windshield wiper motors for the pilot's and first officer's windshields together with the accomplishing of applicable corrective actions. This Directive results from two reports that the left and right windshield wipers stopped working in flight. The Directive is issued to prevent failure of the windshield wipers in wet weather, which could result in decreased visibility for the flightcrew. |\n\n![](image.001.png) \nJames Coyne \nDelegate of the Civil Aviation Safety Authority\n\n27 November 2008","sortOrder":0},{"sectionNumber":"AD/B737/349","sectionType":"part","heading":"AD/B737/349","content":"## AD/B737/349","sortOrder":1},{"sectionNumber":"Windshield Wiper Motors","sectionType":"part","heading":"Windshield Wiper Motors","content":"## Windshield Wiper Motors","sortOrder":2},{"sectionNumber":"1/2009","sectionType":"part","heading":"1/2009","content":"## 1/2009","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains a focused, narrow scope on windshield wiper motor safety. It does not appear to have expanded beyond its original technical safety purpose. The various cross-references and alternative compliance methods are typical of aviation safety regulations and serve to reduce operator burden rather than expand regulatory reach."},"complexity_factors":["Multiple overlapping applicability rules covering different 737 models (-400/-500 vs -600 through -900)","Cross-references to four external documents: two Boeing Service Bulletins, one Rosemount Aerospace Service Bulletin, and one FAA Airworthiness Directive","Conditional compliance pathways: physical inspection OR records review OR prior modifications under AD/B737/218 OR prior actions under earlier ASB","Nested exceptions and clarifications in three numbered Notes plus additional conditional paragraphs","Specific part number variations with and without dashes (P/N 2313M-347-3 vs P/N 2313M347-3) requiring explicit dual identification","Dual effective dates: immediate ban on installations vs 60-month compliance window for inspections"],"plain_english_summary":"This AD requires operators of certain Boeing 737 models to verify and, if needed, correct the windshield wiper motors on the pilot and first officer windows and prohibits use of identified faulty replacement motors. It allows using clear maintenance records in lieu of physical checks and recognizes prior wiring modifications as compliance for some airplanes.\n\nIssued after in‑flight wiper failures, the rule preserves pilot visibility in wet weather and gives operators 60 months to complete required actions."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The Directive's scope—inspect or verify windshield wiper motor part/serial numbers on listed 737 models, complete corrective actions per the cited service bulletins, and ban installation of two specific Rosemount P/Ns—aligns with the stated safety objective to prevent wiper failure. It targets identification, correction and prohibition of specified parts, while permitting limited alternative compliance paths (records review, prior mods, FAA‑approved AMOCs); it does not expand beyond those remedial and preventive measures."},"complexity_factors":["Applicability spans multiple 737 variants with different Boeing service bulletins (ASB 737-30A1059 and SB 737-30A1057 Rev 1), requiring model‑specific actions.","Cross-references to Rosemount SB 2313M-347/2313M-348-30-01 and FAA AD 2008-24-05 create multi-source compliance paths and potential reconciliation issues.","Allows records review in lieu of physical inspection if serial/part numbers are conclusive, adding evidential burdens on maintenance recordkeeping (Requirement 1).","Accepts prior modifications (AD/B737/218) as alternative compliance for certain models provided no affected Rosemount P/N has been installed, introducing conditional equivalence.","Immediate prohibition on install of specific P/Ns (2313M-347-3, 2313M-348-3) imposes an operational sourcing constraint and spare‑parts control obligation (Requirement 2).","Compliance timing split (60 months for inspection; immediate for prohibition) creates different planning and cashflow implications.","Operational detail dependence (legible serial numbers, completion of specific operational tests referenced in Work Packages) raises practical inspection and record verification complexity.","Allowance for later SB revisions approved by FAA as AMOCs introduces ongoing regulatory monitoring for acceptable alternative instructions."],"plain_english_summary":"Requires operators of specified Boeing 737 models to inspect or review records to identify part and serial numbers of pilot and first‑officer windshield wiper motors, carry out corrective actions in the listed Boeing/Rosemount service instructions, and prohibits installing Rosemount motors P/N 2313M‑347‑3 or 2313M‑348‑3 as replacement spares. Compliance requires the inspection within 60 months and the parts ban is effective immediately. The stated purpose is to prevent in‑flight wiper failure; operators bear inspection, corrective and replacement costs and must ensure legible serial records."},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-b737-349-windshield-wiper-motors","history":"/api/acts/ad-b737-349-windshield-wiper-motors/history","analysis":"/api/acts/ad-b737-349-windshield-wiper-motors/analysis","conflicts":"/api/acts/ad-b737-349-windshield-wiper-motors/conflicts","importantCases":"/api/acts/ad-b737-349-windshield-wiper-motors/important-cases","documents":"/api/acts/ad-b737-349-windshield-wiper-motors/documents"}}