{"id":"F2006L02516","name":"AD/F100/79 - Passenger Service Unit","slug":"ad-f100-79-passenger-service-unit","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":59742,"registerId":"commonwealth-F2006L02516-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Fokker F100 (F28 Mk 100) Series Aeroplan","sectionType":"division","heading":"Fokker F100 (F28 Mk 100) Series Aeroplanes","content":"### Fokker F100 (F28 Mk 100) Series Aeroplanes\n\n| AD/F100/79 | Passenger Service Unit | 9/2006 |\n| ---------- | ---------------------- | ------ |\n\n| Applicability: | F28 Mark 0100 aeroplanes equipped with Honeywell International (Grimes Aerospace) Passenger Service Units (PSU) part number (P/N) 10-1178-XX series or 10-1571-XX series, unless modified per Fokker Service Bulletin SBF100-25-070 dated 15 March 1995.                                                                                                                                                                                          |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Inspect the affected PSU (P/N 10-1178-XX series or 10-1571-XX series) panel interface connectors in accordance with Section 3 - Accomplishment Instructions of Fokker Service Bulletin SBF100-25-108 dated 31 March 2006 or later EASA approved revision.                                                                                                                                                                                      |\n|                | 2. If, as a result of the Requirement 1 inspection, any discrepancies are found, rectify the discrepancy in accordance with Section 3 - Accomplishment Instructions of SBF100-25-108 or later EASA approved revision.                                                                                                                                                                                                                             |\n|                | Note: CAA-NL AD NL-2006-008 (EASA Approval 2006-0193) refers.                                                                                                                                                                                                                                                                                                                                                                                     |\n| Compliance:    | For Requirement 1 - Within 36 months after the effective date of this Directive.                                                                                                                                                                                                                                                                                                                                                                  |\n|                | For Requirement 2 - Before further flight after the Requirement 1 inspection.                                                                                                                                                                                                                                                                                                                                                                     |\n|                | This Airworthiness Directive becomes effective on 31 August 2006.                                                                                                                                                                                                                                                                                                                                                                                 |\n| Background:    | The Netherlands Civil Aviation Authority (CAA-NL) has advised that recently, a Fokker 100 (F28 Mark 0100) operator noted that the electrical connectors of the PSUs did not lock properly during installation in the aircraft.                                                                                                                                                                                                                    |\n|                | Investigation revealed that the lack of locking is caused by the tolerance in thickness of the gaskets (seals) inside the PSU connectors. This condition, if not corrected, may cause the connector to overheat, leading to electrical arcing and subsequent failure of the PSU Panels. In such instances, smoke is likely to be emitted. To rectify and prevent this occurring, the PSU manufacturer has narrowed the tolerances of the gaskets. |\n\n|     | Since an unsafe condition has been identified that is likely to exist or develop on aircraft of these type designs, this Directive requires inspection and, where necessary, replacement of the affected PSU Panel J1 and J2 interface connector gaskets. |\n| --- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n21 July 2006","sortOrder":0},{"sectionNumber":"AD/F100/79","sectionType":"part","heading":"AD/F100/79","content":"## AD/F100/79","sortOrder":1},{"sectionNumber":"Passenger Service Unit","sectionType":"part","heading":"Passenger Service Unit","content":"## Passenger Service Unit","sortOrder":2},{"sectionNumber":"9/2006","sectionType":"part","heading":"9/2006","content":"## 9/2006","sortOrder":3}],"analysis":{"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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive applies as stated to F28 Mark 0100 aeroplanes with the listed PSU part numbers and requires inspection and, if necessary, gasket replacement per the referenced service bulletin. The document does not indicate any expansion or narrowing of that original applicability or intent."},"complexity_factors":["Targeted technical applicability by specific aircraft type (F28 Mark 0100) and PSU part numbers (10-1178-XX, 10-1571-XX) increases precision but requires accurate fleet records.","Dependence on external technical documents: inspection and rectification must follow Fokker Service Bulletin SBF100-25-108 or a later EASA‑approved revision, creating reliance on up-to-date approvals and access to the SB.","Compliance timing: a 36-month window for inspection and a strict 'before further flight' requirement for rectification creates operational scheduling constraints.","Repair action limited to gasket/interface connector discrepancies and replacement of PSU Panel J1/J2 interface connector gaskets where required — technical parts and work by maintenance personnel are necessary.","Cross-reference to CAA‑NL AD NL-2006-008 and allowance for earlier modification per SBF100-25-070 (15 Mar 1995) introduces conditional exclusions and verification steps."],"plain_english_summary":"Requires operators of Fokker F100 (F28 Mark 0100) aeroplanes fitted with Honeywell/Grimes Passenger Service Units P/N 10-1178-XX or 10-1571-XX to inspect PSU panel interface connectors and, where discrepancies are found, rectify them per Fokker Service Bulletin SBF100-25-108 (or later EASA-approved revision). Inspections are due within 36 months and repairs must be completed before further flight. CASA issued the directive to prevent connector overheating, arcing and smoke; operators bear inspection and repair costs."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific safety defect in specific PSU models on Fokker F100 aircraft. The scope has not expanded beyond this targeted technical issue."},"complexity_factors":["Single, specific technical issue (PSU connector gaskets)","Clear two-step requirement structure (inspect, then rectify if needed)","Only two compliance deadlines (36 months for inspection, before next flight for repairs)","Limited applicability (specific aircraft type + specific part numbers + specific exclusion)","No nested exceptions or conditional logic beyond the initial applicability carve-out","References external technical documents (Service Bulletin) but does not reproduce them","Short document (approximately 300 words of substantive content)"],"plain_english_summary":"This AD requires operators of Fokker F100 jets with certain Honeywell overhead passenger service units (PSUs) to inspect the PSU electrical connectors within 36 months and correct any defects before further flight. It targets aircraft whose PSU gaskets may allow connectors to not lock, risking overheating, arcing, and cabin smoke. It affects airlines using the listed PSU models unless already modified—it's a preventive safety action after a real connector-failure incident."}},"importantCases":[],"_links":{"self":"/api/acts/ad-f100-79-passenger-service-unit","history":"/api/acts/ad-f100-79-passenger-service-unit/history","analysis":"/api/acts/ad-f100-79-passenger-service-unit/analysis","conflicts":"/api/acts/ad-f100-79-passenger-service-unit/conflicts","importantCases":"/api/acts/ad-f100-79-passenger-service-unit/important-cases","documents":"/api/acts/ad-f100-79-passenger-service-unit/documents"}}