{"id":"F2009L01968","name":"AD/FMS/3 Amdt 1 - Honeywell NZ-2000 and IC-800 Navigation Computers","slug":"ad-fms-3-amdt-1-honeywell-nz-2000-and-ic-800-navigation-computers","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":79156,"registerId":"commonwealth-F2009L01968-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Flight Management Systems","sectionType":"division","heading":"Flight Management Systems","content":"### Flight Management Systems\n\n| AD/FMS/3 Amdt 1 | Honeywell NZ-2000 and IC-800Navigation Computers | 6/2009 |\n| --------------- | ------------------------------------------------ | ------ |\n\n```html\n

Applicability:

Honeywell NZ-2000 navigation computers and Honeywell IC-800 or IC-800E integrated avionics computers.

Note 1: These computers are known to be installed on, but not limited to, the following Transport Category aeroplanes:

Manufacturer

Bombardier, Inc

Dassault Aviation
Gulfstream Aerospace Corporation
Lockheed
Hawker Beechcraft (formerly Raytheon Aircraft Company)

Model

CL-600-2B16 (CL-601-3A, CL-601-3R and CL-604)
Mystère-Falcon 900
G-1159A, G-IV and GV
382G series
BAe.125 Series 800A (including C-29A and U-125)

Requirement:

1. If not previously accomplished in accordance with the original issue of this Directive, determine if the installed NZ-2000 navigation computers and IC-800 or IC-800E integrated avionics computers serving flight management systems (FMS) have computer part numbers and software modification levels identified in Honeywell Technical Newsletter (TN) A23-6111-008, Revision 001, dated
22 February 2007.

Note 2: For purposes of this Directive, aeroplanes with FMS computers having a part number and software modification level identified in the newsletter are \"affected aeroplanes.''

2. For any affected aeroplane, revise the Limitations Section of the applicable Aircraft Flight Manual (AFM) to incorporate the information included in Appendix A of TN A23-6111-008, Revision 001. This may be accomplished by inserting a copy of Appendix A of the newsletter into the AFM.

3. Upgrade the applicable software as specified in Table 1.

\n```\n\n```html\n

After upgrading the applicable software in accordance with Requirement 3, Requirements 1 and 2 are no longer necessary and the Requirement 2 AFM revision may be removed.

Table 1

Upgrade new software in -

In accordance with the Accomplishment Instructions of -

For -

The IC-800 or IC-800E integrated avionic computer (IAC), as applicable

Honeywell Alert Service Bulletin (ASB) 7017300-22-A6112, Revision 001, dated 7 February 2008

The IAC identified in ASB 7017300-22-A6112, Revision 001

The NZ-2000 navigation computer (NAV computer)

Honeywell ASB 7018879-34-A6060, Revision 001, dated
21 January 2008

The NAV computer identified in ASB 7018879-34-A6060, Revision 001

Honeywell ASB 7018879-34-A6062, dated 12 June 2007

The NAV computer identified in ASB 7018879-34-A6062

Honeywell ASB 7018879-34-A6063, dated 6 July 2007

The NAV computer identified in ASB 7018879-34-A6063

Actions accomplished before the effective date of this Amendment in accordance with Honeywell Service Bulletin 7017300-22-A6112, dated 22 June 2007, are acceptable for compliance with the software upgrade to the IC-800 or IC-800E IACs.

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 2009-08-01, are considered acceptable for compliance with the equivalent Requirements of this Directive.

Note 3: FAA AD 2009-08-01 Amdt 39-15874 refers.

Compliance:

For Requirements 1 and 2 - Within 14 days after the effective date of this Amendment.

For Requirement 3 - Within 12 months after the effective date of this Amendment.

This Amendment becomes effective on 4 June 2009.

\n```\n\n| Background: | The FAA has received reports of in-flight unannunciated shifts of computed position in aeroplanes with Honeywell NZ-2000 navigation and IC-800 integrated avionics computers serving Honeywell FMSs. The computed position shift, attributed to a software design error induced during a previous software modification, occurs when the number of inertial reference units (IRUs) supplying data to the FMS degrades from 3 to 2 or from 2 to 1, or increases from 2 to 3 or from 1 to 2. |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| | If the FMS system is coupled to an autopilot or flight director system, this shift in the FMS computed position could result in uncommanded deviations from the intended flight path of the aeroplane and, if those deviations are undetected by the flight crew, compromise terrain and/or traffic avoidance. |\n| | The original issue of this Directive required affected units to be identified and, if necessary, introduced a temporary revision to the AFM Limitations Section. This was considered an interim action, as the manufacturer was developing a modification that would address the unsafe condition. |\n| | This Amendment continues the Requirements of the original issue of the Directive and introduces a terminating action which allows the removal of the AFM temporary revision. The Amendment also adds the IC-800E IAC to the applicability and removes Hawker 800XP and 1000 from the list of possible affected aeroplanes. |\n| | The original issue of this Directive became effective on18 April 2007. |\n\n![](image.001.png) \nJames Coyne \nDelegate of the Civil Aviation Safety Authority\n\n24 April 2009","sortOrder":0},{"sectionNumber":"AD/FMS/3 Amdt 1","sectionType":"part","heading":"AD/FMS/3 Amdt 1","content":"## AD/FMS/3 Amdt 1","sortOrder":1},{"sectionNumber":"Honeywell NZ-2000 and IC-800Navigation C","sectionType":"part","heading":"Honeywell NZ-2000 and IC-800Navigation Computers","content":"## Honeywell NZ-2000 and IC-800 \nNavigation Computers","sortOrder":2},{"sectionNumber":"6/2009","sectionType":"part","heading":"6/2009","content":"## 6/2009","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":6,"scope_assessment":{"changed":true,"description":"The Amendment continues the original Directive's interim AFM revision requirement and adds a terminating action permitting removal of the temporary AFM revision after the prescribed software upgrades are installed. It expands applicability to include the IC-800E IAC and removes Hawker 800XP and 1000 from the previously listed possible affected aeroplanes (Background; post-Requirement 3 text)."},"complexity_factors":["Technical specificity: compliance depends on matching computer part numbers and software modification levels listed in Honeywell Technical Newsletter A23-6111-008 (Requirement 1).","Multiple upgrade paths: Table 1 references several Honeywell Alert Service Bulletins (ASBs) and revisions for different units (IC-800/IC-800E and NZ-2000), creating parallel procedures to follow.","Regulatory cross-reference: Acceptable later SB revisions and Alternate Methods of Compliance depend on FAA AD 2009-08-01 and FAA approval (Table 1 / Note 3), introducing inter-jurisdictional coordination.","Phased compliance burden: short deadline to determine affected units and revise AFM (14 days) versus longer timeframe for software upgrade (12 months) (Compliance section).","Operational drafting: temporary AFM limitation as an interim mitigation with a separate terminating action once software is upgraded (post-Requirement 3 text).","Applicability breadth: directive names specific avionics but lists multiple airframe manufacturers/models (Note 1) and amends applicability by adding IC-800E and removing certain Hawker models (Background).","Identification and administrative work: operators must inspect avionics, amend AFMs (may insert Appendix A), and ensure upgrades are executed per ASBs — creating parts, labour and paperwork demands (Requirements 1–3).","Safety-consequence linkage: the defect manifests as mode/IRU-failure-induced position shifts when IRU counts change, with consequences depending on autopilot/flight-director coupling (Background)."],"plain_english_summary":"This airworthiness directive requires operators to identify Honeywell NZ-2000 and IC-800/IC-800E flight‑management computers, insert a temporary limitation into the Aircraft Flight Manual if units are affected, and install specified software upgrades within set deadlines. It applies to transport‑category aeroplanes fitted with those avionics and aims to correct a software defect that can produce unannounced shifts in computed position and lead to uncommanded autopilot deviations."},"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":4,"scope_assessment":{"changed":true,"description":"The original 2007 directive was an interim measure requiring identification of affected units and temporary flight manual revisions. This 2009 amendment expands scope by: (1) adding the IC-800E integrated avionics computer to applicability, (2) providing a terminating action (software upgrade) that allows removal of the temporary flight restrictions, and (3) removing the Hawker 800XP and 1000 models from the affected list. The directive has evolved from a temporary operational restriction to a permanent hardware/software fix."},"complexity_factors":["Multiple cross-references to external Honeywell technical documents (Technical Newsletter A23-6111-008, three different Alert Service Bulletins)","Conditional compliance logic: Requirements 1 and 2 become unnecessary after Requirement 3 is completed","Nested applicability criteria involving specific part numbers, software modification levels, and aircraft models","Reference to foreign regulatory equivalence (FAA AD 2009-08-01 and AMOC approvals)","Dual compliance timelines (14 days vs 12 months) depending on which requirement is being satisfied","Amendment structure that modifies previous directive (removing Hawker 800XP/1000, adding IC-800E) requiring understanding of delta changes"],"plain_english_summary":"This CASA AD mandates fixes for a software flaw in Honeywell NZ-2000 and IC-800/IC-800E avionics that can silently shift aircraft position when the number of inertial reference units changes, risking unexpected autopilot deviations and collisions. It affects operators of specified Bombardier, Dassault, Gulfstream, Lockheed and Hawker Beechcraft/C-29A/U-125 aircraft.\n\nOperators must insert a temporary AFM warning within 14 days and install a Honeywell software upgrade within 12 months; the 2009 amendment adds IC-800E coverage and corrects affected models."}},"importantCases":[],"_links":{"self":"/api/acts/ad-fms-3-amdt-1-honeywell-nz-2000-and-ic-800-navigation-computers","history":"/api/acts/ad-fms-3-amdt-1-honeywell-nz-2000-and-ic-800-navigation-computers/history","analysis":"/api/acts/ad-fms-3-amdt-1-honeywell-nz-2000-and-ic-800-navigation-computers/analysis","conflicts":"/api/acts/ad-fms-3-amdt-1-honeywell-nz-2000-and-ic-800-navigation-computers/conflicts","importantCases":"/api/acts/ad-fms-3-amdt-1-honeywell-nz-2000-and-ic-800-navigation-computers/important-cases","documents":"/api/acts/ad-fms-3-amdt-1-honeywell-nz-2000-and-ic-800-navigation-computers/documents"}}