{"id":"F2006B01982","name":"AD/A320/93 Amdt 4 - MLG Forward Pintle Pin Cross Bolt","slug":"ad-a320-93-amdt-4-mlg-forward-pintle-pin-cross-bolt","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41204,"registerId":"commonwealth-F2006B01982-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/A320/93 Amdt 4 - MLG Forward Pintle Pin Cross Bolt","content":"![](image.001.png)  \n![](image.002.png)  \nAirbus Industrie A319, A320 and A321 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/A320/93 Amdt 3 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/A320/93\n\nAmdt 4\n\n  \nMLG Forward Pintle Pin Cross Bolt 6/2001\n\nApplicability: All Model A319, A320, and A321 aircraft without Airbus Industrie modification 28903 or 30044 in production or Service Bulletin A320-32-1213 in service.\n\nRequirement: 1. For all Model A320 aircraft, without Airbus Industrie modification 23573 or Service Bulletin (SB) A320-32-1119 original issue or Revision 1.\n\nModify the main landing gear forward pintle pin cross bolt in accordance with SB A320-32-1119 original issue or Revision 1, and apply the inspection program as defined in Requirement 2, until accomplishment of Requirement 3; or,\n\nModify the forward pintle pin cross bolt in accordance with SB A320-32-1213, original issue, Revision 1 or Revision 2.\n\n    2. Perform a detailed visual inspection of the left and right forward pintle pin cross bolt and apply if necessary the corrective actions in accordance with SB\n\nA320-32-1187.\n\n    2. a. For those left and/or right main landing gear legs which have already been inspected in accordance with AOT 32-17 before the issue of Amendment 1 of this Directive, perform the bolt torque check in accordance with SB A320-32-1187.\n\n    3. Modify the forward pintle pin cross bolt in accordance with SB A320-32-1213, original issue, Revision 1 or Revision 2.\n\nNote 1: Accomplishment of SB A320-32-1213 on both left and right main landing gears constitutes terminating action for the inspection requirements of this Directive.\n\nNote 2: DGAC AD 2000-428-153(B) R1 refers.\n\nCompliance: 1. Before accumulation of 20,000 flights or during the next main landing gear overhaul, whichever occurs first.\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n2. For all aircraft; at the following three thresholds whichever occurs later:\n\nwithin 30 months from aircraft first entry into service or before accumulation of 2,000 flights, whichever occurs first; or,\n\nwithin 15 months or before 1,000 flights, whichever occurs first from accomplishment of SB A320-32-1119 original issue or Revision 1, or gear replacement; or,\n\nwithin 500 flights from 26 March 1998.\n\nThereafter, repeat the inspection at intervals not to exceed 15 months or 1,000 flights, whichever occurs first; until modification in accordance with SB A320-32-1213.\n\n    2. a. Within 15 months or before 1,000 flights, whichever occurs first, from last inspection in accordance with AOT 32-17 R1; or,\n\nwithin 500 flights from 28 January 1999.\n\n    3. For all aircraft; before 14 October 2005, or during the next main landing gear overhaul, whichever occurs later.\n\nNote: The Compliance times of the previous issue of this Directive remain unchanged for this issue.\n\nThis amendment becomes effective on 14 June 2001.\n\nBackground: The DGAC required certain inspections to determine the integrity of the main landing gear forward pintle pin cross bolt and its associated pintle pin, in order to prevent the possible collapse of the associated main gear.\n\nAmendment 1 introduced SB A320-32-1187 as the Requirement document, and clarified compliance requirements.\n\nAmendment 2 consolidated the requirements of two previously issued Directives. This Directive includes the requirements of AD/A320/44, and requires incorporation of a modification which constitutes terminating action for the on-going repeat requirements.\n\nAmendment 3 clarified Requirement 1 applicability and Requirement 3 compliance; and corrected a typographical error in Requirement 1 compliance.\n\nAmendment 4 is issued to introduce later revisions of SB A320-32-1119 and correct a typographical error in Paragraph 2 of Compliance part of this Directive.\n\nAmendment 3 of this Airworthiness Directive became effective on 22 March 2001.\n\nAmendment 2 of this Airworthiness Directive became effective on 30 November 2000.\n\nThe original issue of this Airworthiness Directive became effective on 26 March 1998.\n\n![](image.003.png)  \n\nDavid Alan Villiers\n\nDelegate of the Civil Aviation Safety Authority 7 May 2001\n\n![](image.002.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 16 May 2001.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":6,"scope_assessment":{"changed":false,"description":"The amendment consolidates prior requirements, introduces later revisions of referenced Service Bulletins and clarifies compliance timings, but continues to address the same unsafe condition (integrity of the forward pintle pin cross bolt to prevent landing gear collapse). It adds a specific terminating modification (SB A320-32-1213) for ending repeat inspections but does not expand the types of unsafe conditions covered."},"complexity_factors":["Multiple aircraft models subject to applicability with production- and SB-based exclusions (A319, A320, A321; excludes aircraft with mod 28903 or 30044 or SB A320-32-1213).","Several Service Bulletins referenced (A320-32-1119, A320-32-1187, A320-32-1213) including multiple allowable revisions.","Conditional compliance paths: operators may either modify immediately or follow an inspection programme until modification is done.","Multiple, staggered compliance thresholds using mixed metrics (flight cycles, calendar months, and overhaul timing) with “whichever occurs first/last” formulations.","Repeating inspection intervals (15 months or 1,000 flights) that continue until a terminating modification is installed.","Requirements include inspections, torque checks and corrective actions, adding operational and maintenance tasks and recordkeeping.","Cross-references and consolidation of prior ADs and foreign authority AD (DGAC), increasing traceability needs.","Amendments introduce revised SBs and corrections, requiring operators to track SB revision status to determine applicability."],"plain_english_summary":"This Airworthiness Directive requires operators of Airbus A319/A320/A321 aeroplanes (unless certain production modifications or service bulletins are already embodied) to inspect and/or modify the main landing gear forward pintle pin cross bolt to prevent possible main gear collapse. Operators must carry out detailed visual inspections at specified flight/ calendar thresholds, perform corrective actions or torque checks where needed, and fit a particular modification (Service Bulletin A320-32-1213) to stop the repeat inspections. The aircraft operator bears the cost and decides scheduling within the stated compliance windows."},"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"},"kimi_summary":{"content_quality":"ok","complexity_score":7,"scope_assessment":{"changed":true,"description":"The original AD (effective March 1998) was a straightforward inspection directive to prevent landing gear collapse. Through four amendments, it has evolved into a complex, multi-path maintenance program. Amendment 2 consolidated a separate directive (AD/A320/44), Amendment 3 clarified applicability and corrected errors, and Amendment 4 introduced later technical revisions. The scope expanded from simple inspection to a phased modification program with interim inspections, alternative compliance paths, and terminating actions. The Background section explicitly notes this consolidation and expansion of requirements."},"complexity_factors":["Multiple amendment history (Amendments 1-4) with cross-references to previous versions and their effective dates","Nested conditional applicability: different requirements apply depending on whether aircraft have specific Airbus modifications (23573, 28903, 30044) or service bulletins (A320-32-1119, A320-32-1213) installed","Three distinct requirements (1, 2, 3) with sub-requirement 2a creating additional branching logic","Complex compliance timing with multiple alternative thresholds: 'whichever occurs first/last' calculations involving flight hours, calendar months, service bulletin completion dates, and specific calendar dates (26 March 1998, 28 January 1999, 14 October 2005)","Cross-references to external documents: DGAC AD 2000-428-153(B) R1, Airbus Service Bulletins (multiple revisions), and AOT 32-17","Terminating action concept creates dependency between Requirements 2 and 3","Different compliance paths for A320 versus A319/A321 models in Requirement 1"],"plain_english_summary":"This AD mandates inspections and modifications to the forward pintle pin cross bolt on Airbus A319/A320/A321 aircraft that lack specific factory mods or service bulletin SB A320‑32‑1213. It requires interim repetitive inspections, an initial modification option, and ultimately a terminating fix to stop recurring checks.\n\nIt affects operators, owners and maintenance organisations and prevents possible landing‑gear collapse during takeoff or landing by aligning CASA requirements with updated Airbus service instructions."}},"importantCases":[],"_links":{"self":"/api/acts/ad-a320-93-amdt-4-mlg-forward-pintle-pin-cross-bolt","history":"/api/acts/ad-a320-93-amdt-4-mlg-forward-pintle-pin-cross-bolt/history","analysis":"/api/acts/ad-a320-93-amdt-4-mlg-forward-pintle-pin-cross-bolt/analysis","conflicts":"/api/acts/ad-a320-93-amdt-4-mlg-forward-pintle-pin-cross-bolt/conflicts","importantCases":"/api/acts/ad-a320-93-amdt-4-mlg-forward-pintle-pin-cross-bolt/important-cases","documents":"/api/acts/ad-a320-93-amdt-4-mlg-forward-pintle-pin-cross-bolt/documents"}}